1501 results about "Biomass feedstock" patented technology

The invention discloses a magnetic biochar composite adsorbent as well as a preparation method and water treatment application thereof, and relates to the technical field of adsorption materials. The preparation method consists of a biochar matrix and magnetic particles loaded on the surface and in pores of the biochar matrix, and comprises the following steps: preparation of the biochar matrix: step 1, firstly, selecting a biomass raw material; the magnetic charcoal composite adsorbent has unique structure and performance advantages, abundant pore structures and surface functional groups of the adsorbent can provide a large number of adsorption sites for pollutants, and due to the existence of magnetic particles, after the adsorption process is completed, the adsorbent only needs to be placed in an external magnetic field such as an electromagnet and a permanent magnet, so that the magnetic charcoal composite adsorbent can be used for adsorbing the pollutants. The adsorbent can be rapidly separated from the solution or the suspension, the separation time can be controlled within 1-10 minutes, the recovery efficiency of the adsorbent is greatly improved, the treatment cost is reduced, and the adsorbent can be repeatedly used and has good economical efficiency and environmental protection property.

The invention relates to the technical field of preparation and application of porous carbon materials, in particular to a preparation method and application of a high-performance biomass-based porous carbon material.The preparation method comprises the following steps that biomass raw materials are smashed, dried and sieved to obtain smashed materials, the obtained smashed materials are carbonized to obtain carbonized materials, and the carbonized materials are dried to obtain the high-performance biomass-based porous carbon material. Mixing the obtained carbonized material and a coating material according to a ratio, coating to obtain a precursor, activating the obtained precursor to obtain an activated product, washing and drying to obtain the biomass-based porous carbon material, coating the biomass material, and then activating to prepare the biomass-based porous carbon material capable of controlling the macropore ratio and the specific surface area. The biomass-based porous carbon material provided by the invention has relatively high micropore volume and specific surface area, can provide more active sites for chemical vapor deposition silicon and improve the deposition efficiency, and can be used as a lithium battery negative electrode material.

The invention discloses a biomass asphalt composite derivative hard carbon material and a preparation method and application thereof, and the preparation method comprises the following steps: step (1), placing biomass raw material powder in an acid pickling solvent for acid pickling, washing to be neutral after acid pickling, and drying to obtain a biomass precursor; (2) mixing the biomass precursor with asphalt to obtain a precursor mixture; and (3) carrying out low-temperature pre-oxidation on the precursor mixture, and then carrying out high-temperature carbonization, so as to obtain the biomass asphalt composite derivative hard carbon material after the high-temperature carbonization is finished. The prepared biomass asphalt composite derivative hard carbon material is used for preparing a sodium ion battery negative electrode. The technical problems that an existing biomass hard carbon material is low in capacity and tap density, difficult in impurity removal and the like can be solved, the biomass hard carbon material can be used for a sodium-ion battery negative electrode, and the sodium storage performance of a sodium-ion battery is improved.

The invention discloses a preparation method of a biomass hard carbon negative electrode material with low specific surface area, which comprises the following steps: S1, pretreating a biomass raw material to obtain a carbon precursor; s2, carbonizing the carbon precursor at low temperature; s3, crushing and processing low-temperature carbides; s4, preparing a pickling solution for pickling; s5, fine grinding after acid pickling; s6, fusion: fusing a product obtained after fine grinding with asphalt to form a carbon precursor; s7, performing air oxidation modification to obtain an oxidized carbon precursor; s8, carrying out high-temperature carbonization treatment on the oxidized carbon precursor; S9, scattering and dissociating; s10, screening is carried out; and preparing the sodium-ion battery hard carbon negative electrode material. The surface of the biomass carbon material is coated with asphalt, macropores or mesopores on the surface are filled and coated with the asphalt, and then a hard carbon structure is formed through air oxidation and high-temperature carbonization, so that the specific surface area and the first charge-discharge irreversible capacity of the material are reduced, and the coulombic efficiency and the specific capacity are improved.

The invention relates to the technical field of mesoporous carbon material preparation, in particular to a high-temperature mesoporous carbon preparation method which comprises the following steps: S1, mixing a metal halide and an inorganic hydrogen bond donor, and heating and stirring until a solution is clear to obtain an inorganic eutectic solvent; s2, mixing the inorganic eutectic solvent and a biomass raw material for reaction; s3, filtering and washing the material obtained in the step S2; and S4, carbonizing the material obtained in the step S3 in a high-temperature inert atmosphere to obtain the high-temperature mesoporous carbon. According to the method, the wood fiber biomass such as the lowest-value straw, the lowest-value bamboo and the lowest-value wood dust is directly used as raw materials, component separation does not need to be conducted on the wood fiber biomass, and high-value utilization of a large amount of low-value wood fiber biomass can be achieved. The method is relatively simple in process, relatively mild in condition and relatively high in product yield, and an activating agent does not need to be used. The biomass mesoporous carbon prepared by the method also has a high specific surface area in a huge mesoporous volume state, and the specific capacitance in an alkaline electrolyte exceeds 260F / g.

The invention relates to the technical field of soil function improvement, in particular to a rice field soil recarburization and capacity expansion method based on a charcoal-based organic fertilizer. The method comprises the following steps: crushing a biomass raw material, pyrolyzing and cooling to obtain biochar; immersing the biochar in a functional bacteria solution containing actinomycetes and bacillus for activating treatment to obtain modified biochar; mixing the modified biochar and decomposed straw, composting and fermenting to obtain organic fertilizers with different particle sizes; the large-particle-size organic fertilizer is applied to deep soil, the soil is covered with soil after straw is laid on the soil, and the small-particle-size organic fertilizer is applied to surface soil. Through layered application, the large-particle-size biochar repairs the deep soil structure and expands the carbon storage capacity, and meanwhile, the carbon stability is improved through carbon-nitrogen synergistic metabolism driven by functional bacteria, so that the carbon immobilization efficiency is improved, meanwhile, soil recarburization and expansion are achieved, the contradiction between carbon sequestration and structure degradation and nutrient imbalance in a traditional recarburization and expansion technology is solved, and the soil recarburization and expansion efficiency is improved. Synergic improvement of a carbon sink function and agricultural productivity is promoted.

The invention discloses a carbon emission evaluation method and system for coal-fired biomass direct-mixing coupling power generation, and relates to the related field of carbon emission evaluation, and the method comprises the steps: determining the type and characteristics of a biomass raw material, and setting blending combustion conditions; establishing a carbon emission parameter calculation model; establishing a coal-fired biomass direct-mixing coupling carbon emission full-life-cycle evaluation model by combining carbon emission in stages of growth, collection, transportation, pretreatment and ash treatment of biomass raw materials; evaluating the influence of the retention duration of the biomass raw material on the combustion carbon emission to obtain a retention duration influence factor, and correcting the coal-fired biomass direct-mixing coupling carbon emission full-life-cycle evaluation model according to the retention duration influence factor; and performing carbon emission evaluation by adopting the corrected coal biomass direct mixing coupling carbon emission full life cycle evaluation model. The technical problem that existing carbon emission evaluation is insufficient in accuracy and comprehensiveness is solved, and the technical effect of improving the accuracy and comprehensiveness of carbon emission evaluation is achieved.

The invention discloses a biomass-based sodium ion battery hard carbon material and a preparation method and application thereof, and the preparation method comprises the following steps: uniformly mixing a biomass raw material, an oxidation pore-forming reagent and water to obtain a precursor dispersion liquid, standing and drying the precursor dispersion liquid to obtain a hard carbon precursor, pre-carbonizing the hard carbon precursor at 650-900 DEG C for 1-5 h, and cooling to room temperature to obtain the biomass-based sodium ion battery hard carbon material. And carrying out acid pickling to remove impurities so as to obtain an oxidation pore-forming activated material, carrying out deep carbonization on the oxidation pore-forming activated material at 1150-1450 DEG C for 1-8 hours, and cooling to room temperature, so as to obtain the biomass-based sodium ion battery hard carbon material. The biomass-based sodium-ion battery hard carbon material obtained by the invention has the advantages of high first-circle charge specific capacity, high first-circle discharge specific capacity, high slope capacity, high first-circle coulombic efficiency and high cycle stability.

The invention relates to the technical field of chemical automation control, and discloses an intelligent closed-loop control system for producing p-dichlorobenzene by a biomass method, which comprises a signal acquisition module, a residence time reconstruction module, a thermal coupling analysis module, a parameter self-adaptive scheduling module and an execution control module. The rheological characteristics of raw materials are monitored by collecting the current of a stirring motor, the liquid level is dynamically increased through a retention time reconstruction module to prolong the retention time of the materials, and a liquid level periodic migration strategy is introduced to prevent scaling of a gas-liquid interface; the thermal coupling analysis module and the parameter self-adaptive scheduling module are used for calculating thermal retardation post factors, temperature control parameters are corrected in real time, the upper limit of cooling output is limited, inner wall supercooling crystallization is prevented, and the problems that the conversion rate is reduced, the heat transfer efficiency is reduced and equipment is hung on the wall due to viscosity fluctuation of biomass raw materials are effectively solved. And the self-adaptive stable control of the reaction process is realized.

The invention discloses a biomass pyrolysis coupling magnesite calcination synergetic poly-generation method and system. The method mainly comprises the following steps: pyrolyzing a biomass raw material in a biomass pyrolyzing furnace to generate biomass charcoal and biomass gas; biomass gas is fed into the combustion chamber to be combusted, one part of combustion products are fed into the biomass pyrolyzing furnace to supply heat, and the other part of the combustion products are fed into the heat exchanger; feeding the magnesite into a calcining furnace for high-temperature smelting to generate carbon dioxide and magnesium oxide; high-temperature carbon dioxide gas exhausted by the calcining furnace is used for drying and preheating magnesite, one part of the cooled gas is recycled, one part of the cooled gas is fed into the biomass pyrolyzing furnace to react with biomass charcoal, and the other part of the cooled gas enters the heat exchanger to be heated and then enters the calcining furnace. According to the method, light calcined magnesia and carbon dioxide capture are achieved, joint production of high-added-value multi-aperture biomass charcoal and a high-purity carbon dioxide product is generated, biomass fuel which is zero-carbon energy is used for replacing traditional fossil energy, and low-carbon even zero-carbon carbonization in the initial smelting link of magnesite is achieved.

The invention provides a biochar composite porous material for heavy metal contaminated soil remediation and a preparation method and application of the biochar composite porous material. The preparation method comprises the steps that biomass raw materials are subjected to high-temperature pyrolysis carbonization and then smashed, ground and sieved, and biochar powder is obtained; dispersing in a phosphoric acid solution to obtain a biochar solution, and filtering, washing and drying after a hydrothermal activation reaction to obtain activated biochar; dispersing in a chitosan solution, carrying out ultrasonic oscillation, filtering, washing and drying to obtain modified charcoal; mixing sodium bentonite, attapulgite and deionized water, uniformly mixing the modified charcoal, the functional slurry and a sodium carboxymethyl cellulose solution to obtain composite slurry, performing compression molding to obtain a green body, and then drying and calcining the green body. The biochar composite porous material prepared by the invention can simultaneously play multiple roles of physical adsorption, chemical chelation, ion exchange and the like in a heavy metal contaminated soil treatment process, so that efficient fixation of various heavy metal ions is realized.

The invention relates to the field of preparation methods of activated carbon, in particular to a preparation method of biomass activated carbon with a high specific surface area. The method comprises the following steps: S1, cleaning and drying a biomass raw material, then crushing and sieving to obtain powder with uniform granularity, and then grinding and fully mixing the powder with an activator potassium hydroxide to obtain mixture powder; s2, putting the corundum crucible filled with the mixture powder into a tubular furnace, and carrying out two-stage uninterrupted programmed heating and heat preservation in a nitrogen atmosphere; then naturally cooling to room temperature to obtain a crude product of biomass activated carbon; and S3, carrying out acid pickling on the crude product of the biomass activated carbon until a cleaning solution is neutral, and finally drying a solid sample. According to the method, the technological process is simplified, the preparation time is shortened, and the biomass activated carbon with the high specific surface area can be synthesized on a large scale. The method can be applied to industrial production of natural gas or methane storage adsorbents of the ANG technology.

The invention discloses an iron-modified cow dung biochar material as well as a preparation method and application thereof, and belongs to the technical field of new material and resource recycling. The preparation method comprises the following steps: dipping a cow dung solid waste biomass raw material in a K2FeO4 solution, heating in a water bath, drying to obtain a K2FeO4 composite biomass material, and carbonizing at high temperature in a tubular furnace to obtain the K2FeO4 modified cow dung biochar material (FCBC). The K2FeO4 modified cow dung biochar material (FCBC) provided by the invention has better Cd < 2 + > elimination treatment capacity than unmodified cow dung biochar (CBC), and also has an incomparable Cd < 2 + > adsorption effect compared with traditional modified or unmodified plant-derived biochar. According to the method, the practical scene of the livestock and poultry manure waste is widened, the aims of harmlessness, reduction and recycling of the manure are achieved, and more optimal schemes can be provided for prevention and treatment of water and soil pollution.

The invention provides phosphorus-doped hydrothermal synchronously-activated hierarchical pore green biochar, a preparation method thereof and application of the phosphorus-doped hydrothermal synchronously-activated hierarchical pore green biochar in formaldehyde adsorption, and belongs to the technical field of biomass resource high-value utilization and air pollution control. The preparation method comprises the following steps: mixing a biomass raw material with a phosphoric acid catalyst, carrying out hydrothermal carbonization reaction, carrying out solid-liquid separation on a reaction product after the reaction is finished, collecting a solid-phase material, drying, mixing with potassium hydroxide, activating, washing and drying the obtained product, and thus obtaining the phosphorus-doped hydrothermal synchronously-activated hierarchical porous green charcoal. Phosphoric acid is introduced in the hydrothermal stage to serve as a structure-directing agent and a doping source, uniform doping of phosphorus and coordinated regulation and control of a pore structure are achieved, a hierarchical pore channel system is formed in the subsequent activation process, and the physical adsorption and chemical fixation capacity of the biochar to formaldehyde molecules is greatly improved.

The invention discloses a new energy power generation prediction method based on weather data, and the method comprises the following steps: a, carrying out the characteristic analysis of a raw material, collecting the physical characteristic parameters of a biomass raw material, including the heat value of a dry basis, the moisture content of a wet basis and the mass, and generating an initial power generation prediction through a thermodynamic model; b, a distributed temperature and humidity sensor network is deployed in a raw material storage area, temperature, humidity and rainfall data are collected in real time, and the raw material mildew rate and moisture content change are dynamically predicted in combination with environmental parameters; through multi-dimensional data perception, multi-physical field coupling modeling and an intelligent decision engine, dynamic prediction of the raw material quality and the transportation efficiency in biomass energy power generation is realized, the power generation capacity prediction error is reduced, meanwhile, the raw material loss is reduced, and a key technical support is provided for large-scale efficient utilization of biomass energy power generation in new energy power generation.

The invention discloses a biomass dry distillation pyrolysis device, and belongs to the field of biomass pyrolysis, the biomass dry distillation pyrolysis device comprises a shell, a cavity I formed in the shell, a cover body fixedly connected to the upper end of the shell, and an air supply fan fixedly connected to the outer surface of the shell and used for conveying oxygen into the cavity I. The interior of the cavity I is further connected with a feeding unit; the feeding unit comprises a cross-shaped plate body fixedly connected to the interior of the cavity I; according to the biomass raw material particle sorting device, the sorting of particles with different densities is realized by utilizing the force of airflow and the density difference of material particles, so that biomass raw material particles with relatively high density fall into the heat-extending dissolving-assisting blanking disc and roll downwards along the heat-extending dissolving-assisting blanking disc, and the biomass raw material particles with relatively high density are fully preheated before being pyrolyzed; the energy consumption required in the pyrolysis process is reduced, the subsequent sufficient pyrolysis treatment on the interiors of the biomass particles is facilitated, and the situation that the interiors of the biomass raw material particles with relatively high density are not sufficiently pyrolyzed is avoided.

The invention discloses a drying, carbonizing and activating integrated method for activated carbon preparation. The drying, carbonizing and activating integrated method comprises the steps of water-containing feeding, catalytic decoking, fuel gas distribution, high-temperature combustion, activated combustion, integrated activating, integrated carbonizing and integrated drying. According to the integrated method, combustible components in dried tail gas are utilized to form high temperature for activation, then waste heat of activated tail gas is utilized for carbonization, and waste heat of carbonized tail gas is further utilized for drying, so that energy self-circulation is formed; meanwhile, according to the integrated method, self-contained water vapor of the raw materials is utilized, and water vapor is reversely provided for the activation process through circulation of the self-contained water vapor; the method can realize integration of drying, carbonization and activation processes in bamboo activated carbon production, and has the characteristics of energy self-supply, high production efficiency and low process energy consumption. The method not only can be applied to preparation of activated carbon by taking bamboo as a raw material, but also can be applied to preparation of activated carbon by taking wood, coconut shells, fruit shells and other biomass raw materials.

The invention relates to the technical field of soil remediation, in particular to a charcoal-fungus symbiont for a freeze-thaw environment and a preparation method and application of the charcoal-fungus symbiont. The preparation method of the charcoal-fungus symbiont comprises the following steps: crushing a biomass raw material, and carrying out pyrolysis to prepare basic charcoal; placing the basic biochar in an iron oxide solution, and carrying out an iron oxide loading reaction to obtain iron oxide biochar; the preparation method comprises the following steps: dipping iron oxide biochar in a chitosan solution for coating modification, then continuously adding a cross-linking agent for cross-linking solidification, and freeze-drying to obtain chitosan-iron oxide composite modified biochar; and immersing the chitosan-iron oxide composite modified biochar into a bacterial suspension of functional microorganisms, oscillating and adsorbing, and freeze-drying to obtain the carbon-bacteria symbiont. The invention aims to improve the heavy metal pollution phenomenon of soil and the soybean root rot disaster in the freezing and thawing cycle environment at the same time.

The invention discloses a biological carbon / graphene composite material as well as a preparation method and application thereof. The method comprises the following steps: impregnating a biomass raw material with a copper salt solution to obtain a precursor; the precursor is pyrolyzed to obtain a copper oxide modified biological carbon material, then under the conditions of reducing atmosphere and high temperature, carbon dioxide serves as a carbon source, graphene is generated on the copper oxide modified biological carbon material in situ, the biological carbon / graphene / copper composite material is obtained, and the biological carbon / graphene / copper composite material is subjected to copper leaching treatment to obtain the graphene / copper composite material. Obtaining a finished product. The composite material has excellent electrochemical performance, and has excellent rate capability, capacitance and long cycle service life when being used for preparing a capacitor. The preparation method is simple, low in cost and suitable for industrial production.

The invention relates to the technical field of smelting, in particular to a preparation method of direct reduction iron. The preparation method of the direct reduced iron comprises the following steps: by taking high-temperature and high-pressure hydrogen-rich synthesis gas generated by gasifying a biomass raw material as reducing gas, reducing pellets containing medium-low-grade iron ores to obtain the direct reduced iron, the high-temperature and high-pressure hydrogen-rich synthesis gas comprises H2 and CO; when the molar fraction of H2 is 50% < = XH2lt; when the content is 65% and the molar fraction of CO is 30%-45%, the reduction reaction temperature is 900-950 DEG C; when the molar fraction of H2 is 65% < = XH2lt; when the molar fraction of CO is 90% and the molar fraction of CO is 5%-30%, the reduction reaction temperature is 850-900 DEG C; when the molar fraction XH2 of H2 is greater than or equal to 90%, the reduction reaction temperature is 800-850 DEG C; the method can realize direct reduction of hydrogen groups of medium-low-grade iron ores, and is low in energy consumption and less in carbon emission.

The invention relates to the field of biomass energy and chemical industry, in particular to an efficient methanol preparation method based on biomass graded catalytic conversion and cycle coupling. The method comprises the following steps: in a graded catalytic oxidation reaction system, mixing a biomass raw material with a composite vanadium-based catalyst, water, oxygen and circulating methanol for reaction to generate a gas-liquid mixture containing methyl formate; recycling methyl formate by using a gradient variable-pressure rectification separation system; carrying out an interface hydrogenation reaction under the action of a copper-zinc-LTA hierarchical pore catalyst to generate methanol; finally, part of methanol is purified and recycled through membrane separation. The method realizes efficient conversion from biomass to methanol, has the advantages of mild reaction conditions, low energy consumption, high yield and good catalyst stability, and opens up a new path for industrialization of preparation of methanol from biomass.

The invention discloses a method for efficiently preparing furfural and glucose from forest grass biomass. The method comprises the following steps: mixing a forest grass biomass raw material, a molten salt hydrate and an organic solvent, and carrying out a pretreatment reaction to obtain a furfural-containing pretreatment solution and pretreatment residues; mixing the pretreated residues, sulfuric acid and molten salt hydrate, and then performing hydrolysis reaction to obtain hydrolysate containing glucose; the method for preparing furfural and glucose from forest grass biomass provided by the invention is simple, convenient to operate, environment-friendly, short in time, high in yield, economical and efficient, and has a wide industrial application prospect.

The invention discloses a preparation method of a phosphorus-doped hard carbon composite material for a sodium battery. The preparation method comprises the following steps: preparing a hard carbon precursor, preparing a phosphorus-doped precursor, preparing a catalyst precursor, preparing a hard carbon composite material, and carrying out pickling purification. Through pre-oxidation treatment on the biomass raw material, oxygen-containing free radicals can be introduced, the structural disorder can be improved, the sodium storage space and the capacity can be improved, phosphorus elements are uniformly distributed into the hard carbon material through a vapor deposition method, meanwhile, graphene and carbon nanotubes are formed in the material, closed pores are increased, the sodium storage space is improved, and the performance of the hard carbon material is improved. According to the present invention, the ion transmission path is shortened, the sodium ion transmission is accelerated, the capacity and the conductivity of the material are enhanced, the material is coated with the amorphous carbon formed by the asphalt, such that the phosphorus expansion can be inhibited, the contact with the electrolyte can be avoided, the capacity and the first effect can be improved, and the phosphorus and the coating layer can be re-distributed while the asphalt coating is performed so as to form the small amount of the phosphorus fiber crystal; and the conductivity and the capacity are improved.

The invention relates to the field of adsorbents, and discloses a modified activated carbon material as well as a preparation method and application thereof. The material contains a copper metal organic framework, activated carbon and polyvinyl formal, is in a microbead shape, and has a large specific surface area and high sulfur capacity. The preparation method of the modified activated carbon material comprises the following steps: taking activated carbon which is prepared from a biomass raw material and is subjected to nitric acid dipping treatment as a substrate, loading a metal organic framework material, and then forming the metal organic framework material and a polymer raw material into microbeads by using a phase reversal method. According to the method, the whole process is high in controllability, metal components are introduced through a metal organic framework, metal active components are highly dispersed, and the adsorption performance is further enhanced; the prepared formed modified activated carbon material shows good sulfur dioxide adsorption performance and is convenient to use and recycle.

The invention discloses low-impurity biomass hard carbon as well as a preparation method and application thereof. The low-impurity biomass hard carbon is prepared from biomass raw material powder through impurity removal and carbonization; the invention discloses a preparation method of low-impurity biomass hard carbon. The preparation method comprises the following steps: mixing biomass raw material powder with a strain of macro fungi, and culturing until the macro fungi grow sporocarp; the application of the low-impurity biomass hard carbon is that the low-impurity biomass hard carbon is used for preparing a sodium ion battery negative electrode material. According to the method provided by the invention, impurities such as inorganic salts and metal elements in the biomass raw material for preparing the biomass hard carbon can be effectively removed, and meanwhile, the microporous structure of the biomass hard carbon material is maintained, so that the sodium storage performance and the cycling stability of the biomass hard carbon material serving as a sodium-ion battery negative electrode material are improved.

The invention discloses biomass charcoal prepared through pyrolysis-water quenching and a method for preparing iron ore pellets through the biomass charcoal, and belongs to the technical field of iron ore pellet production. Biomass raw materials are pyrolyzed, pyrolytic carbon generated through pyrolysis is rapidly subjected to water quenching at the pyrolysis temperature, then filtering separation, drying and grinding are carried out, and the biomass charcoal is obtained and has the advantages of being low in ash content, low in K and Cl content, high in heat value, low in volatile component content, good in combustion performance and the like, meets the requirement for internal matching of pellets and has the advantages of being environmentally friendly and free of pollution. The coal-based fossil fuel can completely or partially replace fossil fuel for use, and the dependence on the coal-based fossil fuel and the emission of CO2 and pollutants in the iron ore pellet production process are reduced on the premise that normal production of the iron ore pellets is not affected.

The invention belongs to the field of binders, and particularly relates to a flame-retardant binder as well as a preparation method and application thereof. The preparation method of the flame-retardant binder comprises the following steps: uniformly stirring and mixing a biomass raw material and a solvent to obtain a biomass solution; uniformly stirring and mixing a cross-linking agent and the biomass solution to obtain a precursor solution with the solid content of 5-50wt%; and adjusting the pH value of the precursor solution to 3-5 to prepare the flame-retardant binder. According to the invention, the biomass raw material and the cross-linking agent are taken as raw materials, the construction of a cross-linked network is realized by taking pH as driving force, and the bio-based adhesive with the advantages of high adhesive property, high flame retardant property, recoverability, environment friendliness and the like is prepared by controlling the solid content of a precursor solution and the pH of a system; the method can be applied to preparation of products such as a multilayer plate composite material, a particle plate composite material, a coating composite material and a flame-retardant film, and has wide practical application.

The invention relates to the technical field of aquaculture, in particular to an aquaculture water environment repairing agent and a preparation method thereof, and the repairing agent is composed of a modified biochar composite material, chlorella microspheres, a cross-linking agent and a microbial compound inoculant. The modified biochar composite material is prepared through the steps of mixing attapulgite and biomass raw materials, performing acid activation, performing pyrolysis and the like, and tannic acid is used for further modification so as to enhance the adsorption capacity; the chlorella microspheres are prepared from sodium alginate and a CaCl2 solution, and have good suspension property and stability; the microbial complex microbial inoculant contains various beneficial bacteria, and can decompose organic matters and reduce the content of ammonia nitrogen and nitrite; the components of the repairing agent are combined through the cross-linking agent to form particles, so that the repairing agent is convenient to put and recycle. The repairing agent disclosed by the invention has efficient pollutant removal capacity, and can be used for remarkably improving the water quality of aquatic water, improving the transparency of the water, increasing dissolved oxygen and promoting the health and stability of an aquatic ecosystem.

Through sourcing net-primary productivity additive algae-based biomass feedstock, the exclusive use of renewable energy in processing, and the appropriate formulation and processing, a novel algae-derived bio-based plastic is both carbon-negative and provides some performance advantages over existing algae-based film plastics especially with regard to optical clarity. A system may be provided that produces a carbon-negative bioplastic. The production of the bioplastic in a process chamber may be controlled by an electronic controller. The electronic controller may be controlled by a host system, such a server. The electronic controller may be configured to direct production of the bioplastic in the process chamber using hydrocolloid, which is derived from algae.

The invention relates to a preparation method of a biomass hard carbon negative electrode material and application of the biomass hard carbon negative electrode material in the field of energy storage. The method comprises the following steps: carrying out pretreatment, crushing and pre-carbonization treatment on a biomass raw material to obtain a pre-carbonized material; mixing and stirring the pre-carbonized material and an acid solution, washing and drying to obtain an acid-treated hard carbon material; soaking the obtained acid-treated hard carbon material in an alkaline solution, heating and stirring, washing and drying to obtain an alkali-treated hard carbon material; mixing the obtained alkali-treated hard carbon material with a pore-forming agent, carrying out ball milling, carrying out solid-liquid separation, and carrying out high-temperature carbonization and grinding on the obtained solid phase to obtain a powder sample; and mixing the obtained powder sample with hydrofluoric acid, and carrying out hydrothermal treatment to obtain the biomass hard carbon negative electrode material. The sodium ion battery prepared by taking the biomass hard carbon negative electrode material as a negative electrode material has the characteristics of high initial coulombic efficiency, high low-voltage platform specific capacity and excellent cycle performance and rate capability.