29 results about "Porous catalyst" patented technology

The present disclosure relates to a porous catalyst including an oxide matrix structure having mesopores and micropores, and metal nanoparticles embedded in the oxide matrix structure, wherein the metal nanoparticles of the porous catalyst have residual compressive stress.

The invention discloses a porous catalyst based on a biomineralization template, a composite catalytic membrane and preparation and application thereof, and the porous catalyst is prepared by the following method: adding a metal chloride into a transition metal salt solution, then adding the biomineralization template, and stirring in a water bath for reaction; after the reaction is finished, performing suction filtration and drying, and grinding to obtain solid powder; wherein the biomineralization template is selected from one or two of waste pearls and shells; and fully calcining the solid powder in an air or nitrogen atmosphere, naturally cooling the solid powder to room temperature, and washing and drying the solid powder to obtain the porous catalyst based on the biomineralization template. According to the porous catalyst based on the biomineralization template, the magnesium oxide or zinc oxide loaded Co or Cu porous catalyst is synthesized through high-temperature conversion and washing of the biological template, and the performance efficiency of degrading organic pollutants can be improved. The method adopts simple dipping and calcining methods for preparation, and the process flow is short.

Porous catalyst support and methods for producing same are provided herein. An example porous catalyst support includes a porous material defining a plurality of pores, wherein the porous material comprises a porous carbon material, the plurality of pores comprises a plurality of micropores and a plurality of mesopores, and a porosity of the porous catalyst has a predetermined volume of micropores and of mesopores.

The invention provides a porous catalyst as well as a preparation method and application thereof, and belongs to the field of catalysts. The preparation method of the porous catalyst provided by the invention comprises the following steps: carrying out first mixing on slag and an acid solution, and filtering to obtain a metal ion filtrate; the acid solution is a mixed solution of diluted hydrochloric acid and diluted acetic acid; performing second mixing on the metal ion filtrate and an oxidizing agent to obtain a high-valence metal ion solution; thirdly mixing the high-valence metal ion solution, a precipitator and carbon powder, and performing hydrothermal reaction to obtain a catalyst precursor; and carrying out oxygen-enriched roasting on the catalyst precursor to obtain the porous catalyst. The working temperature of the porous catalyst obtained by the preparation method provided by the invention is 160-450 DEG C, the removal efficiency of SO2 and NOx reaches 100%, the service life reaches 130 h or more, the porous catalyst has a wide working temperature interval and a relatively long service life, and simultaneous desulfurization and denitrification at a relatively low reaction temperature can be realized.

The present application relates to a kind of desulfurization denitration porous catalyst, catalyst with manganese oxide MO as the porous carrier of denitration, and the porous carrier provides loading site for active desulfurization catalyst vanadium oxide and cerium oxide.Catalyst is expressed as MO / Ce,V, MO is obtained by high-temperature calcination of metal organic framework compound, select MO porous matrix, then by step-by-step solution method load CeO2 With V2O5 Desulfurization active area is divided, and higher desulfurization denitration conversion efficiency is obtained.

This invention relates to the field of porous materials technology, and in particular provides a method for constructing a nested network model of porous materials. The method includes: acquiring the three-dimensional morphology of the porous material; obtaining the solid 3D spatial position and size distribution information of the porous material's catalyst layer based on the 3D morphology, and obtaining the actual porosity of the catalyst layer; constructing a nested network model of the porous material's catalyst layer based on the 3D spatial position and size distribution information of the porous material using a regular network extraction method or an improved MS-RVT algorithm; using equations to describe the mass transport, charge transport, heat transport, and electrochemical reaction processes in the nested network model; solving the equations to obtain the mass concentration of all pores, the temperature of all nodes, and the chemical reaction rate. This invention reflects the true microstructure of porous catalysts and can obtain the mass transport and reaction rate distribution throughout the entire catalyst region.

This invention relates to a supported single-atom catalyst, its preparation method, and its application in the conversion of n- and secondary hydrogens. The preparation method includes: mixing a salt solution containing a metal precursor with a porous catalyst support, ultrasonicating, drying, and calcining to obtain the supported single-atom catalyst. This catalyst preparation method is simple, highly reproducible, and easy to scale up, and exhibits high activity, high stability, and high mechanical strength in the catalytic conversion of n- and secondary hydrogens. Under conditions of 78 K, 2000 cc(H2) / min / g(catalyst), and 1 atm, the supported single-atom catalyst achieves a catalytic conversion efficiency of up to 93% for n- and secondary hydrogens.

The invention relates to the technical field of composite catalysts, in particular to a defect-state porous TiO2 catalyst as well as a preparation method and application thereof. The technical key points are as follows: the defect-state porous TiO2 catalyst is of a hexagonal hollow structure, the diameter is 150-250 nm, the hollow diameter is 40-60 nm, and the defect-state porous TiO2 catalyst is in an anatase crystal form and is used for catalyzing synthesis of polyethylene furandicarboxylate. According to the preparation method disclosed by the invention, a three-step core process of nano-scale silicalite-1 molecular sieve hard template synthesis, precise alkali etching and hydrogen atmosphere calcination is adopted, the anatase phase defect state porous TiO2 catalyst with a regular hexagonal hollow structure and a pure crystal form is successfully prepared, and deep synergy of structural design and catalytic performance is realized.

The invention provides a catalyst for oxidative removal of low-temperature carbon monoxide and volatile organic compounds as well as a preparation method and a use method of the catalyst. The catalyst comprises a porous catalyst carrier and active components loaded on the porous catalyst carrier, wherein the active components comprise noble metals and at least one or a combination of transition metals and catalytic promoters; wherein the mass ratio of the transition metal to the noble metal is (0-10): 1, the mass ratio of the catalytic promoter to the noble metal is (0-10): 1, and the mass content of the noble metal is 0.1-10% on the basis of the total mass of the catalyst. The catalyst has high catalytic activity and is suitable for low-temperature oxidation removal of carbon monoxide (CO) and volatile organic compounds (VOC) in various application scenes.

The invention provides a catalyst reaction process monitoring method and system, and belongs to the technical field of infrared temperature measurement, and the method comprises the steps: obtaining a single-frame image of porous catalyst thermal imaging, carrying out the channel recognition and segmentation of the single-frame image, and determining multi-channel regions of different structures; the method comprises the following steps: sequentially acquiring porous catalyst thermal imaging infrared images according to preset acquisition time, taking a previous frame of image as a reference frame, acquiring a global extreme value of each pore channel region of a current frame and the reference frame as a temperature difference characteristic index, and determining a temperature difference matrix of each pore channel region of the current frame and the reference frame according to the temperature difference characteristic index; based on the temperature difference matrix of each pore channel area, converting the temperature difference matrix into a high-contrast heat map; and sequentially outputting the high-contrast heat map of each frame according to the acquisition time sequence, and forming an evolution thermodynamic diagram of each pore channel region, the temperature difference of each pore channel region and the temperature change rate. The monitoring method can automatically track the reaction front edge or analyze the dynamic process that the temperature changes along with time.

The present application relates to a manufacturing process for a supported transition metal catalyst, a supported transition metal catalyst, and its use in the synthesis of high-carbon ketones by acyloin condensation of α-hydrogen-containing ketones and alcohols. The manufacturing process of the supported transition metal catalyst comprises adding a porous catalyst support to a solution of a transition metal salt, dissolving, standing, drying, calcining, and reducing. The transition metal salt is selected from one or more of the transition metal nitrate, transition metal formate, transition metal oxalate, and transition metal acetate. The transition metal is selected from the transition metal elements of Group VIIB, VIII, IB, or IIB, and the transition metal is not a non-precious metal. The raw materials for the catalyst according to the present application are readily available and inexpensive to produce.The acyloin condensation of α-hydrogen-containing ketones and low-molecular-weight alcohols allows for the highly selective production of desired high-carbon ketones without the need for solvents or hydrogen sources during the reaction. The catalyst is also stable under long-term operating conditions and therefore has good prospects for industrial applications.

The application relates to the technical field of catalysts, and discloses a modified bimetallic catalyst and a preparation method and application thereof, the preparation method of the modified bimetallic catalyst comprises the following steps: adding a niobium compound, a template agent, a titanium compound and carbon balls into a solvent to obtain a mixed solution; then adding an amino precipitate into the mixed solution to carry out reaction, and obtaining a crude product after calcination; then reacting the crude product with an amino modification solution, and obtaining the product after drying; on the one hand, the titanium compound is added to modify the niobium-based catalyst, chemical action occurs between the two kinds of metals, and the catalytic activity is enhanced; on the other hand, the hollow porous catalyst is prepared by using the double-template combination and the hydrothermal method, transmission channels are provided for macromolecular sulfides, and the adsorption and diffusion processes in the pore channel are accelerated; meanwhile, after the amino modification, the catalyst surface is rich in amino groups and the hydroxyl group polarity is enhanced, the catalyst can directly adsorb the sulfone substances generated in the desulfurization process, and low-temperature and high-efficiency desulfurization is realized.

Provided is a hydrogenation method that can finish in less time, i.e., a hydrogenation method in which a hydrogenation reaction can finish in less time due to an improvement in the reaction rate of the hydrogenation reaction. One aspect of the present invention provides a method for producing a hydrogenated polymer by hydrogenation of an aromatic ring of an aromatic vinyl compound polymer, said method comprising performing a hydrogenation reaction using an aromatic vinyl compound polymer, a solvent, and a hydrogenation catalyst, wherein the hydrogenation catalyst is a porous catalyst, and the total volume of pores having a pore diameter of 50-300 Å in the porous catalyst is 0.17-1.00 mL / g.

The present application relates to the technical field of catalyst preparation, and specifically discloses a preparation method of an ionic liquid / modified fly ash composite material and application thereof. The present application significantly improves the specific surface area of fly ash (FA) through alkaline hydrothermal modification of the fly ash, so that the fly ash becomes an ideal catalytic carrier material for synthesizing green porous catalysts. Further, ionic liquids (ILs) are obtained through quaternization reaction by using a silane coupling agent and an N-containing organic monomer as a monomer, and the ionic liquids are grafted on the modified fly ash carrier, so that the ionic liquid / modified fly ash (ILs@FA) composite material is successfully prepared. The prepared ILs@FA composite material is rich in Lewis acid and nucleophile bifunctional sites. The composite material as a catalyst shows excellent catalytic performance and cycle stability in the CO2 and epoxide cycloaddition reaction, and is expected to be used in actual industrial production.

The application relates to the field of catalysts, and particularly discloses an intelligent design and prediction method for a crystalline porous benzene selective hydrogenation basic zinc carbonate and zinc oxide co-modified nano catalyst, a preparation method of which adopts a mixed solution prepared by mixing and polyethylene glycol as a precipitant for rapid precipitation, and then high-pressure reduction, organic solvent washing, alkali washing and water washing steps are cooperated to prepare a porous catalyst with high specific surface area and uniform dispersion of active components. On this basis, an intelligent design and performance prediction system based on deep learning is further integrated, a convolutional neural network is used to analyze the microstructure of the catalyst, a multi-modal deep neural network is used to predict the performance of the catalyst, and an optimization algorithm is used to recommend optimal process parameters. The porous structure is constructed by co-modification of basic zinc carbonate and zinc oxide, and the intelligent system is combined to realize efficient research and development and accurate performance prediction of the catalyst.

A system and method of producing hydrogen from a petroleum reservoir includes providing a porous configuration of catalyst particles within one or more wellbores in the petroleum reservoir, heating the catalyst particles using one or more electromagnetic wave generators such that hydrocarbons passing through or near the porous configuration of catalyst particles react with the heated catalyst particles and generate syngas. The porous configuration of catalyst particles is disposed only within the one or more wellbores proximate to the one or more electromagnetic wave generators. The hydrogen is separated and extracted from the syngas at the surface or within the one or more wellbores.

The invention relates to a synthesis method of N-Boc-4-oxo-3-ethyl piperidinecarboxylate, which comprises the following steps: reacting benzylamine and ethyl acrylate in a continuous flow reactor to obtain 3, 3 '-(benzyl azadiyl) diethyl propionate; the preparation method comprises the following steps: mixing diethyl 3, 3 '-(benzyl azadiyl) dipropionate with a mixed solvent, adding alkali liquor under the protection of nitrogen, and carrying out heating reflux reaction to obtain 1-benzyl-4-oxopiperidine-3-ethyl formate hydrochloride; the preparation method comprises the following steps: mixing 1-benzyl-4-oxopiperidine-3-ethyl formate hydrochloride, a porous catalyst, ammonium formate and an ethanol aqueous solution, carrying out a heating reaction in a nitrogen atmosphere, monitoring raw material disappearance in a system through HPLC, cooling a reaction liquid, adding alkali and Boc anhydride, and carrying out a reaction to obtain N-BOC-4-oxo-3-piperidinecarboxylate. According to the method, the high-purity N-Boc-4-oxo-3-ethyl piperidinecarboxylate is prepared through continuous reaction, intramolecular cyclization and catalytic transfer hydrogenation processes, and the method is low in cost, small in pollution, mild in reaction, safe and suitable for industrial production.

This invention relates to a gas diffusion electrode for the electrochemical reduction of carbon dioxide, comprising: a conductive porous gas diffusion layer; at least one porous catalyst layer disposed adjacent to the gas diffusion layer, the at least one porous catalyst layer comprising a first porous catalyst layer comprising a copper-based first catalyst material, wherein the first porous catalyst layer comprises a mixture of the copper-based first catalyst material and a hydrophobic material, the porous catalyst layer being obtained from a precursor material free of any ionomers; and an ionomer layer disposed adjacent to the at least one porous catalyst layer, the ionomer layer being obtained from a precursor material free of any catalysts. The invention also relates to an electrochemical cell comprising such a gas diffusion electrode, and a method for manufacturing such a gas diffusion electrode.

The invention provides a medium-temperature carbon fuel cell, the carbon fuel cell comprises an ion conducting layer, and a negative electrode and a positive electrode arranged at two sides of the ion conducting layer, the negative electrode comprises carbon particles, a first electrolyte and a catalyst; the first electrolyte is a molten salt electrolyte; the catalyst comprises one of metal nickel, nickel-chromium alloy, nickel-aluminum alloy and nickel-chromium-aluminum alloy; the ion conducting layer comprises an electrolyte membrane made of a second electrolyte, and the second electrolyte is a solid electrolyte or a composite electrolyte formed by mixing the solid electrolyte and a molten salt electrolyte; the positive electrode comprises a porous catalyst material and a third electrolyte, and the third electrolyte is a solid electrolyte or a composite electrolyte formed by mixing the solid electrolyte and a molten salt electrolyte.

A filter has a porous catalyst composition coating comprising a zeolite, copper and manganese. A method of forming a coated filter comprises: incorporating copper and manganese into a zeolite to form

The application discloses a kind of hydrogen-free low-temperature thermal catalytic conversion polystyrene high-efficiency preparation aromatic hydrocarbon oil method, belong to plastic chemical recycling technical field.The hydrogen-free low-temperature thermal catalytic conversion polystyrene high-efficiency preparation aromatic hydrocarbon oil method includes the following steps: polystyrene is pre-softened, then MgAl-MMO porous catalyst is added to carry out catalytic reaction, and aromatic hydrocarbon oil is obtained;The MgAl-MMO porous catalyst is prepared by magnesium source, aluminum source, sodium carbonate and sodium bicarbonate.The application constructs the core of thermal activation catalyst, low-temperature (280~300 DEG C) atmospheric pressure driven collaborative catalytic system, significantly reduce energy consumption and equipment requirements.At the same time, by optimizing reaction conditions, in the mild environment without solvent and hydrogen, polystyrene (PS) can be efficiently catalytic degradation, and be converted into high value-added aromatic hydrocarbon oil, in addition, the yield of aromatic hydrocarbon oil is high, and high value recovery of polystyrene plastic can be realized.

The invention relates to the technical field of preparation of catalysts, and particularly discloses a preparation method and application of an ionic liquid / modified fly ash composite material. The fly ash (FA) is subjected to alkaline hydrothermal modification to remarkably increase the specific surface area, so that the fly ash becomes an ideal catalytic carrier material for synthesizing a green porous catalyst; furthermore, a silane coupling agent and an N-containing organic monomer are taken as monomers, ionic liquid (ILs) is obtained through quaternization reaction, the ionic liquid (ILs) is grafted to the modified fly ash carrier, and the ionic liquid / modified fly ash (ILs at FA) composite material is successfully prepared. The prepared ILs (at) FA composite material is rich in bifunctional sites of Lewis acid and a nucleophilic reagent. The composite material is used as a catalyst in the cycloaddition reaction of CO2 and epoxide, shows excellent catalytic performance and cycling stability, and is expected to be used for actual industrial production.

The utility model discloses a kind of nitrogen oxide sensor piece core, nitrogen oxide sensor assembly and vehicle, nitrogen oxide sensor piece core includes base, base surface is equipped with air inlet, base inside is provided with decomposition chamber and detection chamber, air inlet, decomposition chamber and detection chamber are sequentially communicated, the inner wall of base at decomposition chamber place is coated with porous catalyst coating, catalyst can react to ammonia gas under high temperature environment, so that ammonia gas is converted into nitrogen and water.Nitrogen oxide sensor piece core of the application sets catalyst in piece core inside, compared with coating catalyst on nitrogen oxide sensor piece core outside, neither affect nitrogen oxide piece core installation, nor need a large number of information samples as experimental data, can be quickly assembled application.

The invention discloses an ion pair porous polymer material. The general formula of the ion pair porous polymer material is POPn-[COO-] [XH +]. The material not only has a high specific surface area and abundant alkaline sites, can efficiently enrich and activate CO2 molecules, but also can be used as a heterogeneous catalyst to regulate and control a reaction path, so that a required high-value target product is obtained. Experiments show that CO2 can be efficiently converted into a target product in a catalytic system taking POP7-[COO-] [XH +] as the catalyst, and the catalyst has good cycle stability. The invention discloses dual functions of the ion pair porous catalyst in directional conversion of diluted CO2, namely capture enrichment and catalytic regulation. Due to the fact that a differentiated interaction mechanism exists between CO2 and different catalytic materials, a new material basis is provided for development of a capture-catalysis integrated platform, and the product range of CO2 resource utilization is expanded.

The invention discloses a porous conductive catalyst layer structure for alkaline electrolyzed water and a construction method thereof, and the method comprises the following steps: 1) mixing a conductive agent, a non-noble metal catalyst, a pore-forming agent and a binder, and preparing to obtain a catalyst precursor dispersion liquid in a slurry form, the conductive agent is a high-conductivity high-molecular polymer or a high-conductivity metal material; 2) loading the catalyst precursor dispersion liquid on the surface of a substrate to obtain a catalyst layer and substrate compounded catalyst layer structure; 3) removing the pore-forming agent in the catalyst layer structure obtained in the step 2) to obtain a porous catalyst layer structure; and 4) drying and hot-pressing the porous catalyst layer structure obtained in the step 3). Through selection of all the components and cooperation with the treatment process, the stability and durability of the catalyst layer under the large current density are improved, the interface mass transfer resistance and charge transfer resistance are reduced, and the consistency and uniformity in the large-scale preparation process are improved.

The invention discloses a continuous preparation method of an acyl fluoride compound, according to the continuous preparation method, in the presence of a catalyst, perfluoroolefin with a general formula of R1R2C = CR3R4 and carbonyl fluoride are subjected to an addition reaction to prepare the acyl fluoride compound with a general formula of CFR3R4-CR1R2-COF, R1, R2, R3 and R4 are independently selected from CnF2n + 1, and n is 0-6; the catalyst is a non-loaded body porous catalyst and consists of bicarbonate and hydrofluoride, and the bicarbonate is selected from one or more of lithium bicarbonate, sodium bicarbonate, potassium bicarbonate, cesium bicarbonate, magnesium bicarbonate, calcium bicarbonate, strontium bicarbonate and barium bicarbonate; the hydrogen fluoride salt is selected from one or more of lithium fluoride, sodium fluoride, potassium fluoride, cesium fluoride, magnesium fluoride, calcium fluoride, strontium fluoride and barium fluoride; the mass percentage ratio of the bicarbonate to the hydrofluoride is (0-60%): (40-100%). The method is mild in continuous reaction condition, easy to operate, almost free of byproducts and suitable for continuous production.

The application relates to a CO2 electrolysis synthesis gas electrode and a preparation method thereof. A precursor solution is prepared through a polymer and a metal salt, the precursor solution is carbonized on a three-dimensional conductive substrate to form an integrated catalytic electrode, the adhesion of a catalytic layer and the three-dimensional conductive substrate is improved, and therefore the stability of the catalytic layer is improved. Calcination makes the polymer play a pore-forming role, and makes the metal catalyst uniformly dispersed on the pore wall. The obtained porous catalyst layer has a high specific surface area and catalytic activity. Nitrogen sites are introduced after carbonization by adding a nitrogen-containing precursor in the precursor solution, a metal-nitrogen-carbon catalyst layer is formed, the adsorption capacity for CO2 is increased, and therefore the conversion rate of CO2 is improved. The CO2 electrolysis synthesis gas electrode prepared by the application has a larger specific surface area, higher metal dispersity and stability than the catalytic electrode prepared by an adhesion method in the prior art, and therefore has higher electrolysis CO2 activity and a longer service life.

The application provides a green coupling hydrogen production system and method, which comprises a green electricity system, a catalyst preparation and hydrogen production system, an aluminum recovery system and a catalytic hydrogenation system. Green electricity generated by renewable energy is used to form aluminum-based alloy through smelting, the aluminum-based alloy is crushed and dealloyed to form a high-efficiency porous catalyst, and high-purity hydrogen is generated. Finally, the generated hydrogen and catalyst are used for catalytic hydrogenation reaction to produce high-value-added chemicals. In addition, aluminum salt obtained from the aluminum-based alloy is precipitated and calcined to obtain alumina, the green electricity is passed into the alumina, and the alumina is electrolyzed to obtain aluminum, and the aluminum raw material enters the cycle again. In the application, the hydrogen produced by coupling has high purity, does not need to be separated, and has a fast hydrogen production rate, the porous catalyst produced by coupling has excellent performance and is widely used, the metal aluminum is recycled, the entire system uses green electricity, the entire process is green, and there is no carbon emission.

The invention relates to a preparation method of a porous catalyst for preparing pyrolysis synthesis gas. The preparation method comprises the following steps: mixing a metal precursor containing VIII A group elements, a ceramic carrier and a solvent to prepare a mixed solution; adding an acid to the mixed solution to prepare a precursor gel; mixing clay into the precursor gel to prepare a mixture; adding an inorganic binder to the mixture to prepare a composite catalyst sol; and drying and calcining the composite catalyst sol.