30 results about "CO poisoning" patented technology

The application provides a Pt-based catalyst with (1x2)-(110) surface structure for catalyzing CO oxidation and a preparation method thereof. The preparation method of the catalyst is as follows: an oxide carrier and a platinum source are ground and loaded, and after heat treatment under a specific atmosphere, Pt-carrier powder is obtained; then the Pt-carrier powder is calcined with a mixed gas of CO and O2 at a certain temperature for a certain time, so that a Pt-based catalyst with Pt surface with (1x2) structure for catalyzing CO oxidation is prepared in situ. The Pt-based catalyst has the following characteristics: the (1x2) structure of the (110) surface of Pt nanoparticles changes the gas adsorption behavior, and establishes double active sites respectively beneficial to adsorption of O2 and desorption of CO, so that the problem of 'CO poisoning' in the Pt catalytic reaction can be significantly relieved during catalytic oxidation of CO. Compared with other catalysts with other structures, the Pt-based catalyst with the (1x2) special structure has more excellent CO catalytic oxidation activity, and has more practical application value.

The invention discloses an anode CO poisoning resistant catalyst and a preparation method thereof. The preparation method comprises the following steps: step 1, preparation of a nitrogen-doped carbon carrier: dispersing carbon black in a concentrated nitric acid solution for hydrothermal reaction; and after the reaction is finished, washing and drying the precipitate, and carrying out heat treatment in an ammonia gas atmosphere to obtain the nitrogen-doped carbon carrier. Step 2, preparation of a catalyst precursor: dispersing the nitrogen-doped carbon carrier in water, adding a platinum precursor and a ruthenium precursor, uniformly mixing, and drying to obtain the catalyst precursor; and step 3, preparation of the anti-anode CO poisoning catalyst: placing the catalyst precursor in a reducing atmosphere for rapid thermal reduction, and cooling to obtain the anti-anode CO poisoning catalyst. Carbon black is modified through concentrated nitric acid and ammonia gas, the carbon carrier uniformly loaded with nitrogen active sites is obtained, and a basis is provided for subsequent uniform distribution of Pt-Ru particles on the C carrier.

This invention discloses the application of a Ni-based catalyst in the anti-CO poisoning hydrogenation reaction of a liquid organic hydrogen support, aiming to solve the technical problem of CO poisoning in existing LOHC hydrogenation catalysts. It uses CO-containing crude hydrogen as the hydrogen source to achieve the hydrogenation reaction. The Ni-based catalyst has an M / Ni reverse-phase structure, using hydrogen-dissociated metallic Ni as the support, and loading nano-metal oxide M as the supported phase to construct reverse-phase interfacial active sites. The metal M is a combination of Zr and Al, with the molar fraction of the supported phase metal M ranging from 10% to 25% based on 100% of all metals in the catalyst. The catalyst preparation method of this invention is simple and easy to implement, possessing a non-traditional supported reverse-phase structure. When applied to the anti-CO poisoning hydrogenation reaction, it exhibits superior activity compared to traditional supported catalysts. Furthermore, the reaction system is clean, safe, and reproducible, allowing for effective recycling and making it suitable for industrial production, showing promising application prospects.

The invention relates to a preparation method and application of a bimetallic catalyst resistant to CO poisoning. The catalyst comprises the following components in percentage by weight: 0.5% of Pt, 0.5% of Ru and 99% of TiO2. The bimetallic PtRu / TiO2 catalyst resistant to CO poisoning is developed by using an isovolumetric-co-impregnation method through a lattice matching induced epitaxial growth strategy, the electronic structure of the catalyst can be adjusted, the CO poisoning resistance of the catalyst can be effectively enhanced, and the bimetallic PtRu / TiO2 catalyst still shows excellent nitrobenzene hydrogenation performance under the conditions that the temperature is 35 DEG C and the CO content is 5000 ppm. The catalyst has the advantages of simple and easy synthesis process, mild preparation conditions, easy industrial amplification production, and wide application prospects.

The invention provides a fuel cell anode catalyst layer preparation method, which comprises: S1, mixing a Ru precursor and an Ir precursor, dispersing to obtain a mixed solution, adding an alkaline solution, carrying out a complexation reaction to obtain a mixture, calcining the mixture, washing, and drying to obtain a RuIrO2 catalyst; s2, mixing a RuIrO2 catalyst, a platinum-based catalyst, a solvent and a perfluorosulfonic acid resin solution, and dispersing to obtain catalyst layer slurry; and S3, coating a substrate with the catalyst layer slurry, and drying to obtain the anode catalyst layer. The RuIrO2 catalyst is added into the fuel cell anode catalyst layer, Ru provides CO poisoning resistance, IrO2 serves as an OER catalyst to enhance the antipole resistance, Ru atoms can effectively reduce the d band center of Pt, the CO tolerance of the fuel cell is improved, and the membrane electrode containing the fuel cell anode catalyst layer has CO poisoning resistance and antipole resistance under low loading capacity.

The present application relates to the technical field of low-carbon metallurgical CO2 reduction catalyst, and specifically discloses a single-atom Mo loaded titanium dioxide hollow sphere, a preparation method and application thereof. The present application inhibits CO from occupying the active center from the adsorption energy level through the electronic regulation of Mo sites, and at the same time, hinders CO from approaching the active center from the mass transfer level by using the hollow confinement structure of TiO2. The synergistic effect of the two significantly improves the stability and selectivity of the catalyst in a low-concentration CO2 atmosphere. Experiments show that in a simulated industrial low-concentration CO2 atmosphere (CO2 volume fraction 15%), the activity of the catalyst does not show obvious attenuation after 16 hours of continuous reaction, and the Mo sites do not show obvious CO poisoning and deactivation after the reaction, proving that the catalyst of the present application has broad application prospects and industrialization promotion value in the fields of CO2 resource utilization of industrial CO-containing exhaust gas and syngas purification.

The application relates to the hydrogen storage technical field and particularly relates to a material for improving the CO poisoning resistance of Pd particles in the hydrogen absorption process and a preparation method thereof, which comprises the following steps: 1) preparing MOF-74(M); 2) adding a solution containing a palladium source precursor into the MOF-74(M) drop by drop, drying the Pd / MOF-74(M) after natural volatilization to obtain Pd / MOF-74(M); 3) introducing hydrogen into the Pd / MOF-74(M) to obtain Pd / MOF-74(M); and 4) obtaining the Pd / MOF-74(M) after activation. 2+ / MOF-74(M). 3) introducing hydrogen into the Pd 2+ / MOF-74(M) to obtain Pd / MOF-74(M). 4) obtaining the Pd / MOF-74(M) after activation. The prior art does not have research on improving the CO gas poisoning resistance of palladium in the hydrogen absorption process, and conventional anti-poisoning means alloying will cause problems such as palladium alloy element segregation, hydrogen absorption capacity reduction, hydrogen absorption rate reduction and the like, the inventors of the application propose that the palladium particles are combined with MOF-74(M) to form a Pd / MOF-74(M) composite structure, which can effectively improve the poisoning effect of strong toxic gas CO on palladium in the hydrogen absorption process.

The application discloses an in-situ surface modification method for enhancing the CO2 and CO poisoning resistance of high-density metal-based alloy, which comprises the following steps: 1) carrying out surface modification on the activated dehydrogenated ZrCo-based alloy in a mixed gas of H2 and a modification gas at 350-450 DEG C; the modification gas is at least one of N2 and CO2; and 2) under the condition of dynamic evacuation, cooling the alloy processed in the step 1) to obtain a ZrCo-based alloy with CO2 and CO poisoning resistance. The application adopts the modification strategy of in-situ surface reconstruction, and solves the problem of poor CO2 and CO poisoning resistance of the ZrCo-based alloy. The application has the advantages of simple steps, low cost and high safety, and has important significance for promoting the application and popularization of the ZrCo-based alloy in the field of hydrogen energy.

The invention belongs to the field of alcohol catalytic oxidation, and particularly relates to a multi-component alloy alcohol oxidation electrode, preparation and application of the multi-component alloy alcohol oxidation electrode in an alcohol fuel cell, and the preparation method of the electrode comprises the following steps: depositing an M1-M2-M3-LDH material on a carbon-based carrier, and then performing reduction treatment to prepare an M1-M2-M3-multi-component alloy carbon-based carrier; and preparing a precursor electrode by taking the M1-M2-M3-multicomponent alloy and carbon-based carrier as an active material, and carrying out CV electrochemical etching in an acidic electrolyte by taking the precursor electrode as a working electrode to prepare the multicomponent alloy alcohol oxidation electrode, wherein M1 comprises at least one noble metal of Pt, Au, Ag, Pd and Ir; m2 comprises at least one divalent metal of Co, Ni, Cu, Zn and Mn; m3 comprises at least one trivalent metal of Ga, In, Bi, Sb and Fe; the molar weight ratio of M1 to M2 to M3 is 1: (1-8): (1-6); the number of CV circulation circles of the CV electrochemical etching is 10 to 100. The material provided by the invention can effectively resist the problem of CO poisoning, and can significantly improve the alcohol catalytic oxidation effect.

The invention relates to the technical field of electrocatalysis, and discloses a hydroxide anode for preparing carbon monoxide through electrochemical reduction of carbon dioxide and a preparation method thereof.The hydroxide anode for preparing carbon monoxide through electrochemical reduction of carbon dioxide comprises a base material and a catalyst arranged on the base material, the catalyst comprises a cobalt-chromium-molybdenum alloy and a coating layer coating the outer surface of the cobalt-chromium-molybdenum alloy, and the coating layer comprises a carbon coating layer and tungsten oxide loaded on the carbon coating layer. The molybdenum element, the cobalt element and the chromium element form an alloy, and CO accumulation is reduced. The surface of the cobalt-chromium-molybdenum alloy is coated with the carbon coating layer, the conductivity of the hydroxide anode is improved, CO molecules are prevented from making contact with the surface of the alloy, in the long-term use process, the activity of a catalyst cannot be reduced due to CO poisoning, the hydroxide reaction can be efficiently conducted in the electrolysis process, the Faraday efficiency is improved, and the stability of the electrode is guaranteed. Tungsten oxide is loaded on the surface of the carbon coating layer, so that the activity and the stability are further improved.

This invention belongs to the field of new energy fuel cell technology, and specifically relates to an anode catalyst with anti-reverse polarity, its preparation method, slurry, and fuel cell. The catalyst includes a support and a Pt-Ru alloy and IrO2 supported on the support, wherein the support is a carbon material support; the particle size of the anti-reverse polarity anode catalyst is 3-5 nm. Addressing the technical deficiencies of existing anti-reverse polarity anode catalysts, this invention proposes an improved anti-reverse polarity anode catalyst. This catalyst uses a carbon material support with superior conductivity and mass transfer capacity compared to metal oxide supports such as TiO2, ZrO2, WO3-Mn, and Nb-TiO2. IrO2, which has high anti-reverse polarity performance, is co-supported with the metal active component Pt-Ru alloy on the carbon material support. The resulting anti-reverse polarity anode catalyst, when applied to a fuel cell, exhibits a reverse polarity time of 171 min and an electrode performance of 1.40 A / cm² after reverse polarity. 2 In addition, this anode catalyst also exhibits excellent resistance to CO poisoning.

The invention relates to the technical field of new energy and new materials, and discloses an anti-CO poisoning ruthenium group cluster hydrogen oxidation electrocatalyst and a preparation method and application thereof.The method comprises the steps that glucose, dicyandiamide and indium salt are evenly mixed in a solvent, then evaporation concentration, freezing and freeze drying treatment are conducted, and a solid precursor is obtained; the preparation method comprises the following steps: carrying out primary calcination on a solid precursor in an inert atmosphere to obtain an indium monatomic modified nitrogen-oxygen co-doped carbon carrier, dispersing the indium monatomic modified nitrogen-oxygen co-doped carbon carrier in a solvent, adding a ruthenium salt solution for dipping, drying, and carrying out secondary calcination in a reducing atmosphere to obtain the ruthenium group cluster hydrogen oxidation electrocatalyst with an ultrathin sheet structure. The preparation method of the catalyst is based on a step-by-step wet chemical synthesis method and comprises the following steps: firstly, constructing an indium monatomic modified nitrogen-doped carbon carrier (In1 atCNO), then loading ruthenium clusters on the carrier through liquid phase impregnation and subsequent reduction treatment, and finally obtaining the target catalyst. The method has the advantages of high universality, short reaction time, simplicity and convenience in operation and the like.

This invention relates to the field of low-carbon metallurgical CO2 reduction catalyst technology, specifically disclosing a single-atom Mo-supported hollow titanium dioxide sphere, its preparation method, and its applications. This invention inhibits CO from occupying the active center at the adsorption energy level through electronic regulation of the Mo sites, while simultaneously utilizing the hollow confinement structure of TiO2 to hinder CO from approaching the active center at the mass transfer level. The synergistic effect of these two methods significantly improves the stability and selectivity of the catalyst in a low-concentration CO2 atmosphere. Experiments show that in a simulated industrial low-concentration CO2 atmosphere (CO2 volume fraction 15%), the catalyst's activity did not significantly decrease after 16 hours of continuous reaction, and no obvious CO poisoning deactivation was observed at the Mo sites after the reaction. This demonstrates that the catalyst of this invention has broad application prospects and industrial promotion value in the fields of CO2 resource utilization from CO-containing industrial tail gas and syngas purification.

The invention belongs to the technical field of catalysts, and particularly discloses a Pd / BEA-coated CeOx core-shell catalyst with high NOx adsorption and high CO poisoning resistance and a preparation method and application thereof.The Pd / BEA-coated CeOx core-shell catalyst takes a Pd / BEA molecular sieve as an inner core and CeOx as a shell layer, the mass ratio of the Pd / BEA molecular sieve to the CeOx is 1: (0.25-0.75), the Pd / BEA molecular sieve takes a molecular sieve as a carrier, Pd is loaded on the molecular sieve carrier through an impregnation method, and the loading amount of Pd is 0.8-1.2 wt%. The catalyst provided by the invention has excellent low-temperature NOx adsorption performance, can rapidly capture NOx, and lays a foundation for subsequent conversion; the catalyst still shows excellent stability after CO poisoning, and the problem of inactivation of a traditional Pd / BEA catalyst can be avoided; the catalyst raw materials are environment-friendly and cheap, the preparation process is simple and easy to operate, special equipment is not needed, and industrial large-scale production is facilitated.

The invention discloses a platinum-based catalyst based on molybdenum carbide nanofibers as well as a preparation method and application of the platinum-based catalyst. The preparation method comprises the following steps: preparing a [CH3COCH = C (O-) CH3] 2MoO2 / C nanofiber material in advance through an electrostatic spinning process, carrying out high-temperature carbon heat treatment to obtain a Mo2C-coated CNFs nanofiber carrier, and loading platinum nanoparticles on the carrier by using a mode of carrying out physical adsorption first and then carrying out heat adsorption to obtain the Pt / Mo2C-coated CNFs catalyst material. The platinum nanoparticles are loaded on the molybdenum carbide nanofiber carrier, the high activity effect of the platinum nanoparticles and the corrosion resistance and efficient charge transfer effect of molybdenum carbide are used for coordinating and optimizing the adsorption effect of an acidic HOR reaction intermediate, and the CO poisoning resistance and phosphoric acid poisoning resistance of the material are improved; and finally, the catalytic activity of the acidic HOR is improved.

The invention belongs to the technical field of alkaline fuel cells and water electrolysis hydrogen production electrocatalysis, and provides a rare earth fluoride composite catalyst for alkaline methanol oxidation and hydrogen evolution, the catalyst takes a rare earth fluoride modified transition metal-carbon composite material as a carrier to load a multi-component metal active center, a multi-metal catalyst system with an NM / TM-REFx / C structure is constructed by using a multi-metal catalyst system, NM is a noble metal, TM is a transition metal, RE is a rare earth element, and the mass fraction of each component is as follows: 1 wt%-9 wt% of NM, 2 wt%-15 wt% of TM and 0.5 wt%-5 wt% of RE; through the electronic regulation and control and interface synergistic effect of the rare earth fluoride, the problems that a platinum-based catalyst is large in precious metal consumption, poor in CO poisoning resistance, high in cost and the like in the alkaline methanol oxidation and hydrogen evolution reaction are solved, and the method is suitable for the low-temperature, efficient and low-energy-consumption alkaline methanol oxidation and hydrogen evolution process.

The invention relates to the technical field of electrocatalysis, and discloses a gadolinium monatomic doped ruthenium / ruthenium oxide heterostructure electrocatalyst and a preparation method and application thereof.The preparation method comprises the steps that benzenetricarboxylic acid and gadolinium nitrate hexahydrate are dissolved in ultrapure water for ultrasonic treatment, and a precursor is obtained through a heating reaction, centrifugation and drying; calcining the precursor at the temperature of 700 to 1000 DEG C in an argon atmosphere to prepare a Gd2O3 MOF material; and adding the Gd2O3 MOF material, polyvinylpyrrolidone and ruthenium chloride hydrate into ethylene glycol, carrying out a reaction at 100-180 DEG C, and carrying out centrifugation, washing and vacuum drying on the reaction product to obtain the gadolinium monatomic doped ruthenium / ruthenium oxide heterostructure electrocatalyst. The catalyst disclosed by the invention shows excellent electro-catalytic performance in an alkaline HOR reaction; a heterogeneous interface optimizes an electronic structure and improves intrinsic activity; the gadolinium monatomic in the crystal lattice enhances the structural stability and CO poisoning resistance, and a high-performance material solution is provided for alkaline hydrogen fuel cell anode catalysis.

The invention provides an NC loaded Rh monatomic and Dy2O3 catalyst and a preparation method and application thereof.The preparation method comprises the steps that zinc nitrate, an Rh precursor and a Dy precursor are dissolved in methyl alcohol, ultrasonic dispersion is conducted, and a solution A is obtained; dissolving 2-methylimidazole in methanol, and carrying out ultrasonic dispersion to obtain a solution B; mixing the solution A and the solution B, carrying out hydrothermal reaction on the obtained mixed solution, cooling, centrifuging, collecting nanocrystals, and washing with methanol to obtain RhDy ZIF-8; and roasting the RhDy ZIF-8, cooling, and grinding to obtain the Dy2O3-Rh / NC catalyst. According to the NC-loaded Rh single atom and Dy2O3 composite material obtained by the method, high-dispersion single atom activity is maintained, and meanwhile, Dy2O3 and Rh single atoms cooperate to endow a catalyst with excellent CO poisoning resistance and FAOR resistance through unique oxyphilicity of Dy2O3, so that the NC-loaded Rh single atom and Dy2O3 composite material shows huge application potential in high-concentration formic acid fuel cells.

The application belongs to the technical field of electrocatalysis, and particularly relates to a single-atom modified multi-element nano-alloy catalyst preparation and methanol fuel cell application. The application first synthesizes a chromium single-atom catalyst (Cr-SAC), then uses the Cr-SAC as a carrier substrate, and uses an electrochemical deposition method to load palladium (Pd), cobalt (Co) and nickel (Ni) metal precursors, and finally obtains a single-atom modified multi-element nano-alloy catalyst PdCoNi / Cr-SAC. The single-atom modified multi-element nano-alloy catalyst synthesized by the method has good conductivity, the single atoms and the multi-element nano-alloy are uniformly distributed on the substrate, the active sites are dense, the CO poisoning resistance is strong, and the catalytic activity and stability of the methanol oxidation reaction are improved, so that the direct methanol fuel cell with the PdCoNi / Cr-SAC catalyst as the anode has super-high energy conversion efficiency and long-term operation stability.

The invention relates to a carbon monoxide poisoning resistant hydrogen fuel cell catalyst and a preparation method thereof, and belongs to the technical field of fuel cell catalysts. The catalyst is composed of a modified carbon carrier, an active component and an auxiliary component, the active component is Pt, and the auxiliary components are Ti and Ru; the catalyst not only has good dispersibility of active components and good mass activity, but also has good CO poisoning resistance. According to the method, the modification of the ruthenium and titanium composite oxide on the carbon carrier is completed in one step by adopting a ball milling method, and the structural stability of the carbon carrier and the CO poisoning resistance of the catalyst are enhanced while abundant Pt anchoring sites are provided; according to the ball-milling process, high dispersion of ruthenium, titanium oxide and Pt on a carbon carrier is promoted by adding a small amount of grinding aid instead of using a solvent, so that generation of waste liquid is effectively reduced, and the greenization degree of the production process is improved.

The invention discloses electrochemical equipment for purifying hydrogen in hydrogen-rich gas, and aims to provide electrochemical equipment capable of reducing CO adsorption capacity of the surface of a catalyst in the electrochemical hydrogen purification equipment so as to improve poisoning resistance of the catalyst, so that CO poisoning of the catalyst is effectively solved; and the electrochemical equipment for purifying the hydrogen in the hydrogen-rich gas is used for solving the problem of failure of the purification equipment. The electrochemical purification device comprises a whole gas inlet and a pure hydrogen outlet, an oil path channel is arranged in the purification device, one end of the oil path channel is an oil path inlet, and the other end of the oil path channel is an oil path outlet; the heat exchanger comprises a whole gas inlet, a whole gas outlet, an oil inlet and an oil outlet, and the whole gas outlet is connected with the whole gas inlet through a connecting pipeline; the oil way pipeline comprises an oil supply pipeline connecting the oil way inlet and the oil liquid outlet and an oil return pipeline connecting the oil way outlet and the oil liquid inlet, and a pump, a heater and a temperature sensor are arranged on the oil way pipeline.

The application discloses application of a magnesium-based intermetallic compound material in anti-CO-poisoning catalytic reaction. The magnesium-based intermetallic compound material is composed of magnesium and other elements in the periodic table. The magnesium-based intermetallic compound material can be used as a catalyst to directly use industrial crude hydrogen containing CO molecules as a hydrogen source to realize efficient hydrogenation of various organic small molecules (such as quinoline, phenylacetylene and its derivatives, benzaldehyde and its derivatives, nitrobenzene and its derivatives, etc.), and excellent reaction activity and product selectivity are exhibited. The magnesium-based intermetallic compound catalyst prepared by the application can effectively inhibit CO poisoning, can directly use industrial crude hydrogen containing CO as a hydrogen source for catalytic hydrogenation, avoids a hydrogen purification step, is favorable for greatly reducing the application cost of hydrogen energy, and has extremely high industrial application value and significant economic competitive advantage.

The invention relates to a preparation method of a catalyst for resisting CO poisoning, and belongs to the technical field of fuel cell catalysts. The method comprises the following steps: mixing an air plasma modified carbon carrier with a Cl ion removed Pt and Ru precursor solution, adding a reducing agent, carrying out a hydrothermal reaction, and washing and drying a hydrothermal reaction product to obtain the CO poisoning resistant catalyst. The Pt-Ru / C catalyst prepared through the method does not contain Cl ions, can resist CO poisoning and is high in activity, and the method has the advantages of being environmentally friendly, convenient to operate and the like.

This invention provides a method for preparing a sponge-like porous Pd-based nanocatalyst, relating to the field of catalyst preparation technology. The method includes the following steps: preparing a reaction solution; preparing a precursor solution; preparing a reduction solution; preparing a sponge-like Pd-based nanocrystal precursor; and electrochemical activation treatment. The sponge-like porous Pd-based nanocatalyst prepared by this method, through the prior synthesis of Pd-based nanoparticles followed by surface modification, overcomes the structural stability defects of traditional composite materials. It allows for control over the size, morphology, distribution, and bonding degree of the composite material, improving the synergistic effect between the Pd-based nanomaterials and hydroxides, thereby inhibiting CO poisoning and enhancing the activity and stability of the material in catalyzing EOR.

The invention discloses a carbon-supported high-entropy alloy catalyst and a preparation method thereof. The carbon-supported high-entropy alloy catalyst comprises a high-entropy alloy and a carbon carrier, wherein the high-entropy alloy is supported on the surface of the carbon carrier; wherein the high-entropy alloy is composed of metal elements of platinum, bismuth, manganese, copper and cobalt. According to the carbon-supported high-entropy alloy catalyst, the catalytic activity of the catalyst is effectively improved, the CO poisoning effect can be inhibited, and the power density of a fuel cell can be improved. Moreover, cheap metals (bismuth, manganese, copper and cobalt) are adopted to replace part of platinum in a traditional platinum-based catalyst, so that the dosage of platinum is reduced on the premise of ensuring the catalytic activity, and the production cost is remarkably reduced.

The invention belongs to the technical field of comprehensive utilization of renewable energy sources and resource utilization of agricultural and forestry wastes, and provides a system and a method for solar photo-thermal-biomass gasification combined heating and poly-generation of a soil conditioner and a tree protection material. The system comprises a solar photo-thermal subsystem, a biomass fixed bed gasification and heating subsystem, a synthesis gas cooling purification and gas-fired boiler heating unit, a building heating loop and waste heat recovery unit, a by-product collection and resource utilization subsystem and a CO sensing and safety control subsystem. Biomass is gasified in a fixed bed gasification furnace to generate high-temperature synthesis gas and plant ash carbon, the high-temperature synthesis gas is subjected to multi-stage cooling and purification and then serves as fuel of a gas-fired boiler for heating, and meanwhile waste heat in the gasification process and the combustion process is recycled through a synthesis gas cooler, a furnace body water jacket and a boiler flue gas heat exchanger; wood vinegar and tar are obtained through oil-water separation of the condensate, the wood vinegar is used for soil improvement and plant growth conditioning, and the tar is used for tree insect prevention, corrosion prevention and wound sealing; the plant ash carbon is cooled, crushed and screened to be applied to farmland or garden plots as a soil conditioner. According to the system, CO sensors are arranged in an equipment room and a living space, and are interlocked with a fan, an electromagnetic valve and combustion control through a controller, so that graded early warning and emergency furnace shutdown when the CO concentration exceeds the standard are realized, and CO poisoning is effectively prevented. According to the invention, solar energy and biomass heat source complementation, efficient heating and poly-generation integration of soil improvement and plant protection are realized, and the system is suitable for popularization and application in rural residences, greenhouses and small public buildings.

The application provides a gas diffusion layer, a preparation method of the gas diffusion layer, a membrane electrode and a fuel cell. The gas diffusion layer comprises a substrate layer and a composite microporous layer arranged on one side surface of the substrate; the material of the composite microporous layer comprises a water vapor reaction catalyst, a carbon material and an ion conductive binder; and the water vapor reaction catalyst comprises a water vapor reaction catalyst active substance and a catalyst carrier. According to the technical scheme of the application, the water vapor reaction catalyst is integrated with the microporous layer (MPL) in the gas diffusion layer, and a gas diffusion layer resistant to CO poisoning is formed. When hydrogen containing CO passes through the MPL layer, the CO in the hydrogen is adsorbed and oxidized into carbon dioxide under the action of the water vapor reaction catalyst, so that the content of CO entering the catalytic layer is significantly reduced, the adverse effect of CO on the electrocatalytic performance of the catalytic layer is effectively reduced, and the performance and service life of the membrane electrode are obviously improved.

This invention relates to the field of catalytic materials technology, specifically disclosing a cobalt-molybdenum based CO sulfur-resistant shift catalyst and its preparation process. The catalyst uses cobalt nitrate and ammonium ammonium paramolybdate as active precursors, alumina as a support, and introduces an imine-linked dopamine-silsesquioxane-cerium coordination composite structure and 2,4,6-tris(4-hydroxyphenyl)-1,3,5-triazine. Simultaneously, it is combined with basic promoters, electronic regulation promoters, and dispersing promoters to synergistically construct a multi-scale regulation system. Through the synergistic coupling of dynamic covalent networks, metal coordination structures, and cage-like confinement structures, effective regulation of the dispersion state, interfacial bonding force, and electronic structure of the active components is achieved. The preparation method includes the preparation of a metal precursor solution, impregnation aging, drying calcination, and sulfurization treatment. The catalyst of this invention exhibits high shift reaction activity, excellent resistance to CO poisoning, and good sulfur resistance stability under high CO and sulfur-containing conditions, making it suitable for carbon monoxide shift reactions in sulfur-containing syngas systems.

The high-temperature polymer fuel cell has good CO poisoning resistance and the like as a hot spot of current international research. At present, common preparation methods of the PBI / H3PO4 film are a post-impregnation method and a sol-gel method. Compared with a post-impregnation method for preparing the PBI / H3PO4 film, a sol-gel method has a series of advantages, and the preparation process of the PBI / H3PO4 film is developed internationally. However, high-molecular-weight linear polybenzimidazole is a difficulty in preparation of a PBI / H3PO4 film by a sol-gel method, and in the reaction process, the mass, heat and the like of a reaction solution are easily distributed unevenly, so that the reaction is terminated or the polymerization degree of reactants is locally and obviously different, and finally, the high-molecular-weight linear polybenzimidazole cannot be prepared. According to the method, the problems of mass transfer and heat transfer caused by sudden increase of the viscosity of the reaction liquid can be effectively avoided by changing the monomer proportion or / and reducing the concentration of the reaction liquid after the reaction reaches a certain degree, and the high-molecular-weight linear PBI is prepared, so that the high-performance PBI / H3PO4 film is obtained.

This invention belongs to the field of catalyst preparation technology, and discloses a catalyst for the efficient photocatalytic conversion of low-concentration CO2 in converter gas and its preparation method. This composite photocatalytic material uses isopropyl titanate, N,N-dimethylformamide, phthalic acid, ionic liquids (ILs), nickel nitrate hexahydrate, ethanol, and dilute nitric acid as main raw materials. A three-phase heterostructure is constructed by adding ILs and NiO, effectively suppressing the recombination of photogenerated electrons and holes. Furthermore, the ionic liquids (ILs) can enrich CO2 components near the catalyst, and NiO can weaken the binding energy of CO on the catalyst surface, thereby enhancing the resistance to CO poisoning. This catalyst is not only simple and inexpensive to prepare, but also effectively acts on low-concentration CO2 in converter gas, increasing the CO concentration by 5-13% and significantly improving the calorific value of the converter gas.