35results about How to "Highly active and stable" patented technology

The invention discloses a copper-iron based catalyst in the technical field of catalyst preparation and application thereof in preparing low mixed alcohols by catalyzing synthesis gas. According to the invention, a copper-magnesium-iron hydrotalcite precursor is prepared by a nucleation-crystallization isolating method, and then the copper-magnesium-iron hydrotalcite precursor is roasted and then subjected to reduction treatment to obtain the copper-iron based catalyst of highly dispersed nanoparticles. The catalyst has the characteristics that the catalytic active ingredients are highly dispersed, the catalytic active ingredients have strong interaction with one another, and are high in stability, and as a result, the activity and selectivity of the catalyst are improved. After the copper-iron based catalyst is applied to preparing low mixed alcohols from the synthesis gas, the CO conversion rate is high, and the selectivity and space time yield of the low mixed alcohols are also improved; besides, the conversion rate of CO for synthesizing low mixed alcohols through CO hydrogenation is 56.89% and the selectivity of alcohols is 49.07%.

The invention discloses a method and a device for synthesizing a natural gas from wind/solar hybrid generation pyrolysis catalytic biomass. Renewable energy sources such as wind energy, solar energy and biomass are combined with electrolyzed water, water can be electrolyzed through wind and solar power generation, the biomass and organic wastes can be pyrolyzed and gasified, products oxygen and hydrogen obtained from the electrolyzed water can be respectively used as a biomass gasification agent and a methane synthesis gas, the gas obtained by gasifying the biomass and the organic wastes through catalysis can be converted into a synthesized natural gas which is supplied as energy, the technical problems that the solar energy and the wind energy are poor in stability and hard to store, the concentration of a combustible gas in the biomass gasified gas is low, the combustible gas quality is hard to control and the like can be effectively solved, and a sustainable energy supply system which can comprehensively utilize the solar energy, the wind energy and the biomass energy is provided.

In recent years, with the rapid growth of the traditional edible fungus industry all over China, the pollution and the hazard generated to the entironment and the edible fungus industry per se by a large number of obsolete fungus sticks (slags) after the primary planting of edible fungi also become bigger and bigger. The invention provides a method for rapidly fermenting and treating obsolete fungus sticks of edible fungi by utilizing sporotrichum thermophile, thereby not only realizing the comprehensive development and the deep utilization of wastes, but also reducing pollution sources to a large degree. In the invention, sporotrichum thermophile is utilized to rapidly ferment the obsolete fungus sticks and the fungus slags of the edible fungi, wherein the fermentation temperature is controlled within the range of 45-70 DEG C; fermentation lasts for 10-15 days, and compared with the traditional fermentation, the fermentation days are shortened by 8-10 days; the fermentation is complete, and harmful pests and eggs can be removed thoroughly; a variety of dedicated organic fertilizers can be prepared if the decomposition products of the fungus sticks are inoculated into other functional strains, coordination factors and the like; the weight proportion of the decomposition products is higher than 50 percent, and the decomposition products have high and stable activity, being beneficial to roots to absorb nutritive materials; the decomposition products can also serve as the compost for the secondary planting of the edible fungi and have convenient operation; common peasant households can prepare and then use the decomposition products on the spot and have low costs and are convenient and quick, thereby being easy to popularize.

The invention discloses a graphene oxide promoted copper-based methanol synthesis catalyst. The catalyst is composed of Cu, ZnO, Al2O3 and graphene oxide (GO). The catalyst is composed of, by mass, 45-65% of Cu, 25-45% of ZnO, 5-10% of Al2O3, and 5-15% of GO. The invention also discloses a preparation method of the catalyst. The catalyst provided by the invention has the advantages of high and stable activity, and low operation temperature. With the catalyst, CO2 conversion rate and methanol yield are both substantially improved.

The invention discloses a cellular denitrification catalyst and a preparation method thereof. The catalyst preparation method comprises the following steps: dissolving a titanium source precursor in an acid to form a solution; respectively dissolving a molybdenum source precursor and a rare earth precursor to form solutions; uniformly mixing the above solutions, regulating the pH value to 7-12, and performing precipitation and filtration; then adding deionized water to form a pulp through blending; adding a vanadium source precursor solution, performing uniform mixing, and then directly performing drying, roasting and powder grinding; then adding an extrusion aid, the molybdenum source precursor solution and a pore forming agent into the powder, adding water with stirring to form a paste through blending, and regulating the pH value to alkaline; then adding nano silicon dioxide, glass fibers and an adhesive, and performing uniform mixing; and conducting extruding through an extruder to obtain a cellular blank, and performing drying and roasting to obtain the finished product. The cellular denitrification catalyst prepared by the preparation method disclosed by the invention can overcome the defects of the denitrification catalyst in the prior art, such as active center imbalance and unstable activity in flue gas.

The invention discloses a methanation catalyst for synthetic natural gas from coal and a preparation method for the methanation catalyst, relating to a catalyst. The catalyst comprises the main components of Ni and Zr, and an accelerating agent Y; the chemical formula of the catalyst is NiiZrjYk, wherein the subscripts i, j and k in the formula are molar proportional factors of Ni, Zr and Y in the catalyst, wherein the catalyst comprises 38%-67% of Ni, 6%-30% of Y and the balance of Zr. The preparation method comprises the following steps of: mixing Ni(NO3)2.6H2O, Zr(NO3)4.3H2O and Y(NO3)3.6H2O and adding water to prepare solution A; dissolving Na2CO3 into the water to prepare solution B; and injecting the solution A into a container which is filled with partial solution B in advance, then enabling the pH value of a coprecipitation reaction system to be 7.0-7.5 by adjusting the added amount of the solution B, filtering the feed liquid after reaction and obtaining precipitates; cleaning the precipitates with deionized water till the concentration of Na+ ions in leacheate is below 0.1ppm, filtering, drying and roasting to obtain the methanation catalyst.

The invention discloses a catalyst used for preparing synthetic natural gas by using coal derived synthesis gas and a preparation method thereof, relates to a catalyst for preparing synthetic natural gas by hydrogenation and methanation of the coal derived synthesis gas, and provides a catalyst which has high and stable low temperature activity, can effectively improve the conversion rate of synthesis gas and the perpass yield of methane, and is used for preparing synthetic natural gas by using coal derived synthesis gas and a preparation method thereof. The catalyst is an ytterbium-promptingcoprecipitation nickel-zirconium base catalyst and comprises the main components Ni and Zr as well as an accelerator Yb. The method comprises the following steps of: mixing Ni(NO3)2.6H2O, Zr(NO3)4.3H2O and Yb(NO3)3.6H2O, then adding water in the mixture to prepare a solution A; dissolving K2CO3 into water to prepare a solution B; injecting the solutions A and B into a container for a reaction; filtering a feed liquid to obtain precipitates; and washing with deionized water until ion concentration of K<+> in a leacheate is below 0.1ppm, then filtering, drying, roasting to obtain the catalyst.

The invention provides a catalyst for synthesis of low-carbon alcohol ether from syngas and a preparation method thereof, particularly a carbon nanotube-based nanomaterial-promoted Ni-Mo-K oxide catalyst for synthesis of low-carbon alcohol ether from syngas and a preparation method thereof. The catalyst contains a Ni-Mo-K oxide and a carbon nanotube-based nanomaterial promoter, and has a chemical formula as follows: NiiMojKk-x% (CNT or y%Ni/CNT), wherein the subscripts I, j and k are the molar ratio coefficients of the related metal elements in the Ni-Mo-K oxide, and x% is the mass percentage of the promoter in the catalyst. The component percentages of the catalyst are as follows: 20% to 50% of Ni, 35% to 70% of Mo, 0% to 3% of K, and 8% to 16% of the promoter. The catalyst is prepared by firstly allowing the precipitation reaction between Ni, Mo and the promoter, then loading K to the reaction product by impregnation method and finally oven-drying and calcining.

The invention discloses a catalyst for hydrogen production by ethanol steam reforming and a preparation method of the catalyst and relates to catalysts. The catalyst comprises active metal, a carrier accelerant and an auxiliary, wherein the weight percentage of the active metal to the carrier accelerant to the auxiliary is (15%-75%) to (10%-50%) to (5%-60%). The catalyst is prepared by adopting coprecipitation reaction; the activity, the selectivity and the operation stabilization of the catalyst are high and stable; under an optimized optimum reaction condition, the conversion rate of ethyl alcohol and the space time yield of H2 in products can be up to 19.1% and 1.151mol/(h.g); by-products are relatively few; the operation period and the service life of the catalyst are obviously better than those of existing similar or related catalysts. The catalyst is easy and convenient to prepare and good in repeatability.

The invention discloses an accelerant for titanium powder mechanochemical deposition and application, which belong to the technical field of titanium plating on steel matrixes. The accelerant comprises the following raw materials in percentage by mass: 10%-25% of ammonium bifluoride, 5%-12% of zinc sulfate (ZnSO4.7H2O), 6%-15% of polyethylene glycol, 3%-8% of nickel aminosulfonate, 3%-8% of emulsifier, 2%-5% of sodium hypophosphite, 0.5%-6% of inorganic strong acid and the balance of water. When the accelerant is prepared, water and inorganic strong acid are firstly added into a container, andthen ammonium bifluoride, zinc sulfate, nickel aminosulfonate, polyethylene glycol and an emulsifying agent are added. The accelerant disclosed by the invention is used for preparing a mechanochemical deposition titanium plating layer on a steel matrix, the titanium powder and the accelerant disclosed by the invention are added together in use, the components of the accelerant can activate the surface of the titanium powder, continuous and stable deposition of the titanium powder in a plating solution environment is realized, and finally, the titanium plating layer which is firm in combination and uniform in thickness is obtained on the surface of the matrix.

The invention discloses streptomyces olivaceus, a bacterial strain GDMCC No.60272, a microbial inoculum prepared by the bacterial strain, a preparation method of the microbial inoculum, and application of the microbial inoculum in promoting plant growth in the salt environment. The streptomyces olivaceus bacterial strain is high and stable in reactivity, and can effectively promote plant growth inthe salt environment. The microbial inoculum preparation method is simple, the production cost is low, pollution does not occur, and scale application is achieved. Growth of a plant in the salt environment can be promoted when the plant is irrigated by the microbial inoculum, and salinized soil can be improved. The cost is low, application is simple, pollution does not occur, toxin residue is prevented, and harm to people and animals is avoided.

The invention discloses a catalyst for preparing synthetic natural gas and a preparation method thereof, and relates to a catalyst. The catalyst is scandium-enhanced coprecipitation type nickle-cobalt-based catalyst, the chemical formula is NiiZrjSck, wherein the subscripts i, j and k in the formula are the molar ratio factor of Ni, Zr and Sc in the catalyst; the catalyst comprises the following components in percent by weight: 48%-62% of Ni, 3%-25% of Sc and the balance of Zr. The preparation method comprises the following steps of: mixing and preparing metered Ni(NO3)2.6H2O, Zr(NO3)4.3H2O and Sc(NO3) into aqueous solution, carrying out coprecipitation reaction with K2CO3 aqueous solution, filtering feed liquid after reaction, cleaning, drying and roasting on filtered cakes, and then obtaining the NiiZrjSck catalyst for methanation of coal or biomass-based synthetic natural gas. The catalyst disclosed by the invention has the advantages that the activity is high and stable, the heat resistance is good, the conversion rate of hydrogenated methanation of CO and CO2 and the per pass yield of a product (methane) can be effectively improved.

The invention discloses pervious concrete for a pavement and a preparation process of the pervious concrete, and relates to the field of concrete, and the pervious concrete for the pavement is prepared from the following components in parts by weight: 1300-1500 parts of gravel, 400-500 parts of cement, 80-120 parts of mineral admixture, 30-50 parts of bentonite, 25-50 parts of steel fiber, 0.8-6.2parts of a water reducing agent, 1-1.5 parts of an early strength agent and 110-140 parts of water. The preparation process of the pervious concrete for the pavement comprises the following steps: S1, premixing the powder, S2, blending the aggregate and the powder, and S3, mixing the concrete. The water permeable brick has the advantages of being good in water permeability, high in strength, notprone to deformation and long in service life.

The invention provides a defect-containing sandwich type perovskite catalyst as well as a preparation method and application thereof. The catalyst has the following advantages that surface defects are constructed only by adjusting the addition amount of glyoxal in a one-step simple and feasible hydrothermal reaction; oxygen vacancies affect the optical property of the material, can enhance the absorption of visible light, and can be changed into active reaction sites to further promote the photocatalytic NO removal efficiency; and secondary pollution is easy to control, and the catalyst has a good application prospect in the field of environmental treatment. A hydrothermal method is utilized to prepare the defect-containing sandwich type perovskite catalyst with a nanosheet structure, and the surface defects are constructed by utilizing a reducing reagent such as glyoxal and accurately regulating and controlling the addition amount of the reducing reagent. Due to the adoption of liquid phase synthesis, the method is feasible, relatively simple in synthesis process, simple and convenient to operate, relatively low in energy consumption compared with high-temperature hydrogen/inert gas calcination, easy to control, low in cost and suitable for large-scale preparation.

The invention relates to the field of gene engineering, in particular to a dengue virus serum type 3 epidemic strain GZ14D3 replicon and application thereof. A direct-early promoter of cytomegalovirus which can be transcribed in eukaryotic cells is utilized to construct a subgenome replicon of a dengue virus serum type 3 clinical isolate with a luciferase reporter gene, and the subgenome replicon comprises 5 'UTR of the virus, a partial capsid protein sequence and an NS1-NS5 sequence. The replicon plasmid is transfected to a BHK-21 cell, and the BHK-21 cell is screened by using neomycin, so that a DENV-3 monoclonal replicon cell containing a stable expression luciferase reporter gene signal is screened out. The known DENV inhibitor mycophenolic acid is used for verifying that the medicine shows a good virus replication inhibition effect on replicon cells, and the medicine of methylclocycline sulfosalicylate with an inhibition effect on DENV-3 replicon is found.