35results about How to "Promote hydrogen production" patented technology

The invention discloses a catalyst for preparing a multi-carbon product by electro-reduction of carbon dioxide and carbon monoxide as well as a preparation method and application thereof, and belongsto the field of electro-catalysis. The catalyst is a halogen-modified copper electro-catalyst, and halogen comprises at least one of fluorine, chlorine, bromine and iodine. The preparation method of the catalyst comprises the following steps: loading a copper halide precursor on a gas diffusion layer, and carrying out electric reduction to obtain the halogen-modified copper electro-catalyst, wherein the copper halide precursor comprises at least one of a fluorine copper hydroxide precursor and other copper halide precursors except the fluorine copper hydroxide precursor. The catalyst is applied to a reaction for preparing a multi-carbon product by electrically reducing carbon dioxide and carbon monoxide, is high in reaction activity, high in selectivity and stable in catalytic performance,and maintains very high multi-carbon product selectivity in a very wide current range.

The invention relates to a method applicable to a palladium-modified metal electrode with foamed nickel materials as bases. The method comprises the steps that an oxidation layer and oil fouling on the surface of the foamed nickel base materials are removed; bivalent cobalt salt and sodium salt are used for preparing electro-deposition liquid, an inert graphite electrode is used a positive electrode, the foamed nickel base materials are used as a negative electrode, electro-deposition is performed with constant temperature and constant current for preparing a Co/foamed nickel electrode, and drying is performed; the Co/foamed nickel electrode is placed in a tube type resistance furnace, the temperature is increased at a constant speed till reaching the preset value, constant-temperature calcination is performed, and then the Co3O4/foamed nickel electrode can be obtained; and H2PdC14 impregnation-deposition liquid is prepared, the Co3O4/foamed nickel electrode is placed in the impregnation-deposition liquid, the impregnation-deposition liquid is shaked in a table concentrator till the impregnation-deposition liquid becomes colorless, and therefore a Pd/Co3O4/foamed nickel electrode is obtained. The hydrogen-evolution potential of the electrode can be lowered, the hydrogen production and storage capability of the system are improved, and it is ensued that electrocatalytic reduction and degradation are rapidly and efficiently performed on halogenated organic matter.

The invention discloses a method for preparing hydrogen from straws, which comprises the following steps: carrying out aerobic degradation on straws by using a composite microbial inoculum capable of degrading straws; cattle manure pretreatment: screening the cattle manure with a 50-mesh screen to remove granular solids and impurities, boiling for 30-60 minutes, and centrifugating to remove excessive moisture for later use; preparation of straw anaerobic degradation culture medium: preparing a liquid anaerobic degradation culture medium, and adding the straws subjected to aerobic degradation; and adding the pretreated cattle manure into the straw anaerobic degradation culture medium, charging nitrogen into the container to remove oxygen, sealing, and culturing at 60-70 DEG C at the rate of 120 r/min in a dark place. The method optimally combines anaerobic degradation and anaerobic fermentation, has the advantages of short required time for hydrogen production, low cost, no need of adding enzymes in the fermentation process and cheap raw materials, and greatly saves the cost.

The invention discloses a blended fuel cell, which is for the purpose of providing a direct-like sodium borohydride-hydrazine blended fuel cell. The blended fuel cell includes a fuel cell connected with an air blower, a fuel tank, a miniature transfer pump, wherein, the bottom outlet of the fuel tank connects with the miniature transfer pump and the fuel cell in sequence through pipelines, the outlet of the fuel cell is connected with the upside of the fuel tank, on the upside of which an air vent and a fuel filling opening are arranged, and on the lower part of which a residue outlet is arranged; a fuel solution is circulated through the miniature transfer pump; the fuel in the fuel tank is a sodium borohydride-hydrazine-water solution, wherein, the hydrazine is a chemical hydride whose hydrogen content is higher than that of the sodium borohydride, after the hydrazine is added, not only is the stability of the sodium borohydride improved, but also the energy density of the fuel can be enhanced, so that the producing of the hydrogen is easy, the energy density is higher, and the working efficiency of the fuel cell is improved.

The invention belongs to the technical field of microbial fermentation biological hydrogen production, and particularly relates to a medium for promoting hydrogen production of HAU-M1 photosynthetic bacteria flora and application thereof. The medium comprises 0.1-1g/L of NH4Cl, 0.01-0.5g/L of MgCl2, 0.01-0.2g/L of yeast extract, 0.1-1g/L of K2HPO4, 1-3g/L of NaCl, 1-5g/L of sodium glutamate and 0.3-2.5g/L of hydrogen-producing amino acid. The hydrogen-producing amino acid is one or a mixture of a plurality of L-cysteine, L-alanine, L-threonine, L-leucine and L-serine in any ratio. Based on a general inventive concept, the invention also provides application of the medium in biological hydrogen production, thereby effectively improving the hydrogen production capability of the HAU-M1 photosynthetic bacteria flora.

The present invention discloses a carbon-based composite biological fertilizer. The carbon-based composite biological fertilizer is prepared from the following raw materials in parts by weight: 20-60parts of biochar, 10-30 parts of plant ash, 8-25 parts of medical stone powder, 3-15 parts of zeolite powder, 2-8 parts of potassium feldspar powder, 1-6 parts of ground phosphate rock, 15-45 parts ofhumic acid, 1-10 parts of potassium fulvate and 1-15 parts of photosynthetic nitrogen fixation composite bacteria. The carbon-based composite biological fertilizer gives full play to the respective advantages of photosynthetic nitrogen fixation composite bacteria, biochar, plant ash, medical stone powder, zeolite powder, potassium feldspar powder, ground phosphate rock, humic acid and potassium fulvic acid, not only realizes effective improvement and remediation of soil and improves the crop yield, but also is beneficial to promoting the development of green low-carbon agriculture. The invention also provides a preparation method of the carbon-based composite biological fertilizer, which is simple and convenient to operate and convenient for batch production. The invention also provides application of the carbon-based composite biological fertilizer, and the carbon-based composite biological fertilizer is compounded with one or more of decomposed manure, an organic fertilizer, slag, biomass pyrolysis residues or crop wastes according to different types of soil, so that the fertilizer efficiency is exerted.

The invention provides ferro-nickel diselenide, as well as a preparation method and application thereof. The ferro-nickel diselenide is a polyhedral nanocrystal and has a chemical formula as NixFe1-xSe2, wherein the value of X is 0.5. A Ni2Fe(OH)7 compound is prepared on a foamed nickel substrate through an electrodeposition method, and the reaction time only needs hundreds of seconds compared with the time required for a traditional hydrothermal method, so that the reaction time is greatly shortened; and the preparation process is simple and easy to implement, large-area preparation can be realized, a substrate covering the Ni2Fe(OH)7 compound can be prepared at a time, and foamed nickel is subject to selenylation through a solvent thermal selenization method so as to obtain the ferro-nickel diselenide which shows favorable hydrogen generation and oxygen generation performance.

The invention belongs to the technical field of organic waste matter resource utilization, and particularly relates to a method for improving excess activated sludge anaerobic fermentation hydrogen production efficiency. The method comprises the steps that the pH in the whole process of excess activated sludge anaerobic fermentation hydrogen production is controlled to be about 10 all the time, the fermentation temperature is ensured to be within a high temperature range, the activity of homoacetogenic bacteria is sufficiently restrained, and the obtained hydrogen yield can reach 81 mL H2/g-VSS which is obviously higher than the excess activated sludge anaerobic fermentation hydrogen yield being about 25 mL H2/g-VSS reported at present. No pretreatment process needs to be carried out on activated sludge, the waste organic matter anaerobic fermentation hydrogen production level can be effectively improved, production of clean energy hydrogen is facilitated, and meanwhile resource utilization is carried out on excess activated sludge and other waste organic matter.

The invention belongs to the technical field of bioengineering technology, and particularly relates to a preparation method of an oxygen consumption protective layer on the chlorella cell surface. According to the preparation method of the oxygen consumption protective layer on the chlorella cell surface, cell surface engineering technology is introduced to the green alga cell surface, green algacells generate hydrogen in an atmospheric environment through single coating of the green alga cell surface, and a functional protective layer is constructed manually on the cell surface to improve inherent nature and functions of a living body. The preparation method of the oxygen consumption protective layer on the chlorella cell surface comprises the steps that step one, culture of pyrenoid chlorella cells is carried out; step two, pyrenoid chlorella cells modified by polydopamine are prepared; and step three, pyrenoid chlorella cells coated with the polydopamine and laccase are prepared. The oxygen consumption protective layer with a bi-component structure is constructed on the pyrenoid chlorella surface. The oxygen consumption protective layer has better biocompatibility, can maintainown activity of the living body, enables the periphery of the pyrenoid chlorella to maintain the atmospheric environment and generate hydrogen, and has a certain defensive and protective effect on the living body when the external environment is unfriendly.

The invention discloses a blended fuel cell, which is for the purpose of providing a direct-like sodium borohydride-hydrazine blended fuel cell. The blended fuel cell includes a fuel cell connected with an air blower, and a hydrogen generator comprising a fuel tank, a tubular reactor and a filter; wherein, the bottom outlet of the fuel tank connects with the transfer pump and the tubular reactor in sequence through pipelines, the outlet of the tubular reactor is connected with the filter arranged on the upside of the fuel tank, the air vent on the upside of the fuel tank is connected with the fuel cell through a hydrogen pipeline, the fuel in the fuel tank is a sodium borohydride-hydrazine-water solution. After the hydrazine is added, not only is the stability of the sodium borohydride improved, but also the energy density of the fuel can be enhanced, so that the producing of the hydrogen is easy, the energy density is higher, and the working efficiency of the fuel cell is improved.

The invention provides a method for improving dark fermentation hydrogen production performance by using a ferroferric oxide/reduced graphene oxide nano composite material. The addition amount of the ferroferric oxide/reduced graphene oxide nano composite material in the anaerobic dark fermentation system is 100-400mg/L, the ferroferric oxide/reduced graphene oxide nano composite material is prepared from the following components in percentage by mass: 22.79%-27.57% of nano ferroferric oxide and 22.79%-27.57% of reduced graphene oxide. The size of the ferroferric oxide/reduced graphene oxide nano composite material is 80 to 120 nm. The nano ferroferric oxide is uniformly distributed on the surface of the gauze-shaped reduced graphene oxide. According to the structure, the agglomeration phenomenon of ferroferric oxide and reduced graphene oxide is well avoided, the materials can be better dispersed in a dark fermentation hydrogen production system, the interrelation among microorganisms is increased, more electronic channels are constructed, and the hydrogen production performance of hydrogen production microorganisms is improved.

The invention relates to a fuel processor that produces hydrogen from a fuel. The fuel processor comprises a reformer and a heater. The reformer includes a catalyst that facilitates the production of hydrogen from the fuel; the heater provides heat to the reformer. Multipass reformer and heater chambers are described that reduce fuel processor size. Single layer fuel processors include reformer and heater chambers in a compact form factor that is well suited for portable applications. Some fuel processors described herein place an electrically resistive material in contact with a thermally conductive material to heat fuel entering the fuel processor. This is particularly useful during start-up of the fuel processor. Fuel processors described may also include features that facilitate assembly.

The invention discloses a preparation method of hydrogen gas and particularly relates to the preparation method of the hydrogen gas with blended fuel containing sodium borohydride and hydrazine. The invention includes the following steps: under normal temperature and pressure, sodium borohydride powders are dissolved in hydrated hydrazine N2H4.H2O to get mixed water solution containing the borohydride and the hydrazine and then water is added to ensure mass proportion of the borohydride, the hydrazine and the water to be 100:20 to 100:100 to 200 in the mixed water solution. The mixed water solution containing the borohydride and the hydrazine is transmitted through a reactor filled with catalysts and is hydrolyzed into mixed gas containing hydrogen gas and nitrogen gas under effects of the catalysts. The nitrogen gas is got after separation. The hydrazine is a chemical hydride with a larger hydrogen amount than the sodium borohydride. Adding hydrazine which can both improve the stability of the sodium borohydride and enhance the energy density of fuel has the advantages that the production of hydrogen becomes more convenient and the energy density is higher.

The invention discloses a method for preparing hydrogen-rich gas by catalyzing biomass tar cracking through aluminum smelting waste residues, which comprises the following steps: adding the aluminum smelting waste residues into medium strong acid, soaking for 2-4 hours, filtering, and baking the obtained precipitate at 300-400 DEG C for 3-6 hours to obtain pretreated aluminum smelting waste residues; adding the pretreated aluminum smelting waste residues into weak acid, performing ultrasonic treatment, performing centrifugal separation on an aluminum ash solution, baking for 3-6 hours at the constant temperature of 400-500 DEG C in an air atmosphere, and naturally cooling to room temperature to obtain a cracking catalyst; the method comprises the following steps: uniformly mixing a cracking catalyst and biomass according to a mass ratio of 1: 1, adding the mixture into a first-stage pyrolyzing furnace in an N2 atmosphere, and heating from room temperature to 500-900 DEG C to obtain first-stage pyrolyzing gas; and the first-stage pyrolysis gas enters a second-stage pyrolysis furnace for secondary catalytic cracking, and hydrogen-rich gas is obtained. According to the method, the hydrogen yield can be effectively increased by 200% or above, the tar yield is effectively reduced, the liquid yield is controlled to be 11% or below, and heavy components in the tar are greatly reduced.

The invention discloses a memory, and hydrogen resource optimization, device and equipment for a hydrogen system, and the method comprises the steps: carrying out the logic division of the hydrogen system, and building a corresponding unit model; establishing a substance mathematical model and an energy mathematical model; determining whether a feed stream of the hydrogen recovery unit can be used as a feed of the hydrogen using unit to determine whether the feed stream is used as a hydrogen supply stream or a hydrogen recovery stream; performing simulation solution on the substance mathematical model and the energy mathematical model to obtain a simulation operation result as a system initial value of the hydrogen system; according to a preset hydrogen consumption prediction model, obtaining a hydrogen consumption calculation result corresponding to the hydrogen using unit; and determining the value of each optimization variable by taking the minimum energy consumption of the hydrogen system as a target according to a hydrogen consumption measurement result. According to the method, firstly, the accuracy of the hydrogen consumption result value is improved, and then the objective function and the mathematical model are established from the angle of energy consumption minimization of the hydrogen system, so that parallel optimization of the hydrogen consumption and the energy consumption of the hydrogen system is achieved.

The invention discloses a photoelectrode material based on an InGaN/organic heterostructure as well as a preparation method and application of the photoelectrode material. The photoelectrode material comprises a Si substrate, an InGaN nano column arranged on the Si substrate, and an organic material layer arranged on the upper surface of the InGaN nano column, and the organic material layer is a non-fullerene material layer. The organic material IT-4F is used, so that the absorption spectrum range of the photoelectrode material is widened, surface charge recombination is effectively passivated, meanwhile, dissociation and transmission of charge carriers and reduction reaction of the charge carriers on an electrode/electrolyte interface are promoted through a heterostructure formed by the organic material IT-4F and the InGaN nanorods, and the photoelectric conversion efficiency is greatly improved; therefore, hydrogen production by photoelectrochemical water decomposition without bias voltage is realized, and an effective strategy is provided for efficiently converting solar energy into hydrogen energy.