20 results about "Hydrothermal carbonization" patented technology

The application provides a system and method for coupling new energy water electrolysis hydrogen production and solid waste resources, and the system comprises: a wind power generation unit, comprising an output end for supplying power to the outside; a hydrothermal carbonization unit connected with the output end of the wind power generation unit and comprising a first biochar unit and a first carbonization chamber for hydrothermal carbonization of biomass; a drying unit connected with the output end of the wind power generation unit and connected with the first biochar unit; a dry distillation carbonization unit connected with the output end of the wind power generation unit and comprising a tar collection unit, a second biochar unit, a pyrolysis gas collection unit and a second carbonization chamber for dry distillation carbonization of biomass; a water electrolysis hydrogen production unit connected with the output end of the wind power generation unit and comprising an electrolytic tank; and a methane preparation unit connected with the water electrolysis hydrogen production unit, the pyrolysis gas collection unit and the second biochar unit.

The application discloses a kind of FeCoNi nanoparticle loaded yeast-derived carbon composite wave-absorbing materials and preparation method thereof.The method uses yeast as biomass carbon source, and yeast-derived carbon is obtained by hydrothermal carbonization;Then, the three-metal precursor salt (Fe2+, Co2+, Ni2+) is dissolved in the solvent according to a certain mass ratio with yeast-derived carbon, and FeCoNi nanoparticles are in-situ loaded on the surface of yeast-derived carbon by hydrothermal impregnation method, and the composite wave-absorbing material is obtained after drying and inert atmosphere heat treatment.The FeCoNi nanoparticles in the obtained material are uniformly dispersed on the surface of carbon material, and the synergistic effect of dielectric loss and magnetic loss is utilized to achieve excellent electromagnetic wave absorption performance.The method is simple, low in cost, and requires small equipment, and the prepared material is environmentally friendly, sustainable, and has strong controllability, etc., and is suitable for radar stealth field.

Systems and methods of producing hydrochar include a well having a depth, a top positioned at surface, a bottom portion positioned at a subterranean location, the well comprising casing and tubing positioned therein, forming an annulus. The casing and tubing define a hydrothermal carbonization (HTC) reaction zone in a bottom portion of the well and a heat transfer and separation zone above the HTC reaction zone. The well may be heated using high pressure steam and / or a cable having an electric heating element positioned in the tubing in the HTC reaction zone configured to transfer energy to biomass slurry flowing through the tubing, converting some of the biomass slurry into hydrochar by HTC. The well depth and heating are design to produce temperature and pressure in the HTC reaction zone sufficient to form sub-critical water and produce a product fluid comprising the hydrochar.

The application relates to a method for recovering liquid-phase phosphorus and acetic acid by co-hydrothermal carbonization of fish paste and cellulose acetate, and belongs to the technical field of waste resource utilization and clean energy preparation. The method comprises the following steps: (1) mixing fish paste and cellulose acetate according to a mass ratio of 1:3-3:1, and carrying out hydrothermal carbonization at 200-240 DEG C for 0.5-2 h; (2) carrying out solid-liquid separation on the hydrothermal carbonization product to obtain liquid products and solid products; (3) recovering liquid-phase phosphorus and acetic acid from the liquid products; and (4) using the dried solid products as clean solid fuel. The application realizes the collaborative treatment of fish paste and cellulose acetate through a single process, simultaneously completes the recovery of phosphorus and acetic acid and the preparation of solid fuel, does not need to add chemicals, and has the advantages of simple process flow, low cost and environmental friendliness.

Flexible Device and Method for the Valorization of Biomass and Waste by Roasting and Hydrothermal Carbonization. The invention relates to a flexible system and method for the thermoconversion of biomass by roasting or hydrothermal carbonization of all types of biomass, depending on the biomass moisture content. The present invention relates to the technical field of the thermoconversion of biomass and waste to produce energy and / or materials. The invention will find particular application for the valorization of sewage sludge, manure, and driftwood waste, the moisture content of which can vary considerably. Figure for the abstract: Fig. 1

The application discloses a biomass-based carbon nanotube material for supercapacitor electrodes and a preparation method thereof. The biomass-based carbon nanotube material is prepared by using corn starch, pine wood, fungus and the like as raw materials, removing part of light components in the raw materials by a hydrothermal carbonization method to increase the carbon content, and then generating the carbon nanotube material by in-situ pyrolysis by using a one-step activation method. The carbon nanotube material prepared by the method has excellent conductivity and capacitance in supercapacitor tests. Moreover, the conductivity of the obtained carbon nanotube material can be adjusted by synthesis conditions, so that the electrochemical performance of the supercapacitor is improved. In addition, the preparation method is simple in process and has obvious cost advantages, and the obtained biomass-based carbon nanotube material is expected to be widely applied in the field of supercapacitor electrode materials.

The application discloses a preparation method of a high-yield biomass-based sodium ion battery hard carbon negative electrode material, and comprises the following steps: S1, pretreatment: biomass raw materials are crushed and sieved to obtain biomass raw material fragments; S2, hydrothermal carbonization: the biomass raw material fragments obtained in the step S1, a catalyst, an acid solution and a crosslinking agent are added into a reaction kettle for hydrothermal reaction carbonization to obtain a carbonized precursor; S3, precursor purification: the carbonized precursor obtained in the step S2 is subjected to centrifugal separation, water washing and drying to obtain a purified precursor; S4, crushing and powdering: the precursor obtained in the step S3 is crushed and powdered to obtain a precursor powder; and S5, high-temperature carbonization: the precursor powder obtained in the step S4 is placed in a high-temperature furnace and subjected to high-temperature carbonization in an inert gas atmosphere to obtain the biomass-based sodium ion battery hard carbon negative electrode material. The application has the characteristics of high yield, high purity and excellent electrochemical performance.

This invention discloses a method for preparing artificial coal through synergistic hydrothermal carbonization of steam-exploded straw and catering waste filtrate. First, straw is treated under a certain steam pressure for a period of time to obtain steam-exploded straw. Second, catering waste is centrifuged to obtain catering waste filtrate, which is then allowed to stand for a period of time to obtain upper and lower layers of catering waste filtrate. Finally, the steam-exploded straw and the upper or lower layer of catering waste filtrate are subjected to a hydrothermal carbonization reaction. The hydrothermal carbonization product is then separated into solid and liquid components, and the resulting solid product is the artificial coal. The steam explosion technology can initially remove easily hydrolyzed and difficult-to-carbonize cellulose and hemicellulose, increasing lignin content and enhancing the carbonizability of straw. The Maillard reaction between the reducing polysaccharides produced by straw hydrolysis and the amino acids produced by catering waste protein hydrolysis converts the organic matter in the raw materials into artificial coal, maximizing the utilization of the organic matter in the raw materials.

The application provides an efficient remediation method for continuous cropping obstacle soil, and belongs to the technical field of soil remediation.The method comprises the following steps: crushing kitchen garbage and mixing the kitchen garbage with water to obtain a mixed solution; under a closed condition at 180 DEG C to 240 DEG C, performing a hydrothermal carbonization reaction on the mixed solution, and then performing solid-liquid separation to obtain a hydrothermal solution; uniformly mixing a plant carbon source and a plant nitrogen source with the continuous cropping obstacle soil to be remediated, and then pouring the hydrothermal solution to form a mixed soil, wherein the addition amount of the hydrothermal solution is 0.1% to 0.5% of the dry weight of the soil to be remediated, the addition amount of the plant carbon source is 0.1% to 1.0% of the dry weight of the soil to be remediated, and the addition amount of the plant nitrogen source is 0.05% to 0.8% of the dry weight of the soil to be remediated; after the mixed soil is irrigated to saturation, the mixed soil is covered and sealed, and then kept in an environment above 28 DEG C for more than 30 days; after the film is removed, ventilation and airing are performed to complete soil remediation.The method can improve the reaction temperature of the soil to be remediated, degrades phenolic acid allelochemicals, inhibits harmful fungi, simultaneously fertilizes and adjusts the soil acidity, and improves the remediation effect of the continuous cropping obstacle soil.

The present application belongs to the field of nanometer carbon material preparation, discloses a kind of carbon quantum dots and preparation method thereof prepared by waste recovery, suitable for UV curing coating application, aims at solving the problems such as poor batch consistency of carbon dots prepared from waste and insufficient compatibility with coating, realizes the high value closed loop of electrochemical aluminum / transfer film waste coating waste material.The present application uses the waste coating waste material containing nitrogen polymer in the industry as raw material, after pre-classification and alkali alcohol mixed solvent pretreatment, hydrothermal carbonization and purification, surface modification is completed by UV photochemical grafting specific UV curing monomer, and 2-10nm nitrogen-doped graphene quantum dot powder is prepared;The process parameters such as hydrothermal and grafting are optimized, to realize the covalent bonding of carbon quantum dots and UV curing coating.The raw material of the present application is green and low cost, the batch consistency of the product is significantly improved, the compatibility and storage stability of the coating are greatly improved, and after adding, the fluorescence anti-counterfeiting and curing tracing of UV curing coating can be realized, which meets the requirements of double carbon target and new material industry development.

This invention discloses a method for the high-value utilization of kitchen waste and waste plastics, belonging to the field of solid waste resource utilization and environmental protection technology. This invention utilizes the synergistic conversion characteristics of kitchen waste and waste plastics, achieving high-value utilization of mixed solid waste through a co-hydrothermal carbonization process. By introducing anhydrous ethanol to pre-wet and disperse the surface of the waste plastics before co-hydrothermal carbonization, the problem of traditional plastics being unable to directly participate in hydrothermal reactions is avoided, reducing complex sorting and energy-intensive pretreatment steps. This invention also introduces iron salts as Lewis acid catalysts and structure inducers during the hydrothermal carbonization process, promoting the dehydration, condensation, and aromatization reactions of biomass components through in-situ catalysis. Combined with subsequent pyrolysis and acid washing, iron-based substances are effectively removed, thereby releasing and constructing a rich pore structure, ultimately obtaining a porous carbon material with high specific surface area and good porosity.

The present invention relates to a method for use in a biogas plant having at least one digester (12) and a thermal treatment unit (50), the method comprising the steps of : a ) anaerobically digesting an organic biomass (18) in at least one digester (12) through microorganisms at a temperature below 50 ° C to produce methane-containing biogas (16) and a digestate (14); b) removing a major fraction (32) of the digestate (14) from the digestion process after a fast retention time t and subjecting at least part of said major digestate fraction (32) to a thermal treatment in a thermal treatment unit (50) at a temperature above 175 ° C for at least one minute, wherein the thermal treatment step involves at least one treatment selected from the group consisting of pyrolysis, torrefaction, gasification, hydrothermal gasification, hydrothermal carbonization and hydrothermal liquefaction; and c ) retrieving a minor fraction (34) of the digestate (14) from the digestion process after an inoculum retention time T that is longer than the fast retention time t, returning said minor digestate fraction (34) into the digestion process and mixing the minor digestate fraction with the organic biomass (18) within the digester (12).

DEPCT69 The polymer composition has been revealed, and the polymer components are made using at least... One polymer and filler based on lignin is prepared from lignin provided under specific treatment. In hydrothermal carbonization, the amount of filler in the polymer composition is 5-50 parts. Per percent, and the total amount of living-generated carbon present in the polymer composition. The 4-100% percentage further reveals the cured polymer composition and the constituent materials. Including the cured polymer components;

This invention provides a method for preparing a magnetic hydrothermal biochar-based heavy metal adsorbent material, belonging to the field of environmental functional materials technology. It selects inexpensive, renewable, and easily modifiable natural biomass as raw material, and obtains a magnetic porous carbon framework through one-step hydrothermal carbonization. Then, epoxy groups are introduced using green electron beam radiation grafting technology. Finally, high-density amino functional groups are grafted onto the surface of the magnetic hydrothermal biochar through a dual-amino synergistic ring-opening reaction involving small-molecule polyamines with any one of ethylenediamine (EDA), triethylenetetramine (TETA), polyethyleneimine (PEI), and diethylenetriamine (DETA). The prepared adsorbent material possesses high adsorption capacity, rapid adsorption kinetics, and convenient magnetic separation and recovery performance, effectively solving the bottleneck problems of insufficient adsorption performance and difficulty in recovery of existing biomass adsorbents.

This invention relates to the field of biomass energy technology, specifically disclosing a biomass gasification fuel. The gasification fuel is prepared by a method comprising the following steps: hydrothermal carbonization of biomass raw materials to obtain a hydrothermal carbon intermediate; pyrolysis activation of the hydrothermal carbon intermediate using an alkaline metal oxide precursor solution to obtain a catalytic carbon material; feeding the catalytic carbon material into a gasification reactor for in-situ catalytic gasification under an oxygen-water vapor mixed gasifying agent to obtain crude syngas; passing the crude syngas into an integral honeycomb ceramic catalytic reforming reactor for in-situ reforming to obtain reformed gas; purifying the reformed gas sequentially through a high-temperature filter and a desulfurization adsorbent to obtain purified gas; recycling a portion of the purified gas back into the gasification reactor, with the remainder output as biomass gasification fuel. This invention has advantages such as low tar content, high syngas quality, high carbon conversion rate, and high energy utilization efficiency.

This invention belongs to the field of waste heat utilization technology in hydrothermal carbonization, and relates to a sludge hydrothermal carbonization waste heat heating system and method based on an absorption heat pump. It includes: a sludge hydrothermal carbonization subsystem, a dehydration heat exchange subsystem, and an absorption heat pump subsystem. The dehydration heat exchange subsystem includes a filter press, a product cooler, a drying device, a filtrate heat exchanger, a condensate tank, and a first wastewater storage tank, connected in sequence. The absorption heat pump subsystem includes a generator, a condenser, an evaporator, an absorber, a solution pump, a solution heat exchanger, a pressure reducing valve, and a second wastewater storage tank, connected in sequence. The input end of the absorber is used to connect to the output end of the heating device, and the output end of the condenser is used to connect to the input end of the heating device. This invention utilizes primary flash steam, secondary flash steam, and dehydrated filtrate to heat the return water of the heating network through the absorption heat pump subsystem to obtain heating hot water, solving the problems of high energy consumption and low waste heat recovery rate in existing sludge treatment methods.

The application discloses a traditional Chinese medicine residue hydrothermal carbonization reactor, which comprises rotatable shaft spiral blades, and the spiral blades of the shaft spiral blades are distributed in the axial direction of the shaft with equal pitch; and further comprises a microwave heater and a sound wave generator arranged on the side wall of the reactor. The application further discloses a hydrothermal carbonization system comprising the above reactor. The reactor can greatly improve the uniformity of the temperature and pressure of each region in the reactor during the carbonization process, thereby ensuring the uniformity and efficiency of the carbonization reaction, and further improving the quality of the hydrothermal carbon product.