197 results about "Carbocatalysis" patented technology

The embodiment of the invention relates to the technical field of flow batteries, and provides a carbon felt electrode for a flow battery and a preparation method thereof, and the preparation method comprises the following steps: preparing a mixed salt solution containing first metal ions and second metal ions; preparing an alcohol solution containing 2-methylimidazole; adding the mixed salt solution into the alcohol solution, and uniformly mixing to obtain a precursor solution; immersing the cleaned carbon felt into the precursor solution for a first time, then taking out the carbon felt, cleaning the carbon felt with an alcohol solvent, and drying the carbon felt to obtain a ZIF carbon felt; and putting the ZIF carbon felt into a tube furnace protected by inert gas, and carrying out heat treatment at a preset temperature for a preset second time to obtain the carbon felt electrode. The invention provides a novel bimetallic catalyst, and the interaction between metals can promote the adsorption and activation of reactants on metal atoms and promote the proceeding of the reaction. In the nitrogen-carbon catalyst formed by carbonizing ZIF, metal ions are uniformly dispersed, and agglomeration of the metal ions in the synthesis process is prevented.

The invention belongs to the technical field of catalysts, and provides an oxygen-doped carbon nitride catalyst and a preparation method and application thereof.The preparation method comprises the steps that melamine, a hydrogen peroxide aqueous solution and acetonitrile are mixed and subjected to a hydrothermal reaction, and a precursor material is obtained; and calcining the precursor material to obtain the oxygen-doped carbon nitride catalyst. The method has the following advantages: (1) the synthesis process of the catalyst is simple, the raw materials for synthesizing the catalyst are cheap and easily available, the equipment requirement for synthesizing the catalyst is simple and convenient, and the operation is easy; and (2) the catalyst has excellent reaction catalytic performance for selective oxidation of sulfides, has good substrate adaptability, is easy to recycle and reuse, and still has high yield after being used for many times. And (3) the adaptability of photocatalytic heterogeneous oxidation to substrate expansion in drug molecules is rarely reported at present, and the invention provides an application method of a metal-free photocatalyst for efficiently and selectively oxidizing sulfide under the condition of no additional additive.

The invention discloses a high-performance thermosetting resin plugging material, a preparation method and a water-based drilling fluid, and relates to the technical field of oilfield chemistry, and the preparation method of the plugging material comprises the following steps: stirring an aromatic compound containing two double bonds with sodium tungstate, a transfer catalyst and a hydrogen peroxide solution at room temperature for reaction, and purifying to obtain an epoxy compound; the preparation method comprises the following steps: heating an aromatic compound containing an aldehyde group, ammonium formate and a palladium-carbon catalyst with nitrogen to react to obtain an amine compound, transferring the epoxy compound and the amine compound into a size-adjustable mold, carrying out heating curing treatment, carrying out low-temperature ball milling on a crude product to obtain plugging material particles, and preparing the water-based drilling fluid by using the plugging material particles. The specific aromatic rigid framework monomer is selected, and the molar ratio of epoxy to the curing agent is accurately controlled, so that the mechanical strength and thermal stability of the material are remarkably optimized, and the plugging material has a good treatment effect on cracks and pores in complex stratums.

The invention relates to the technical field of composite materials, in particular to a graphite carbon nitride catalytic membrane material and a preparation method and application thereof. The preparation method comprises the following steps: mixing melamine, a halogen source and water, drying, and carrying out heat treatment to obtain the halogen intercalation carbon nitride composite material; mixing the halogen intercalation carbon nitride composite material dispersion liquid with a metal salt solution, then adjusting the pH value to be alkaline, carrying out an in-situ coprecipitation reaction to obtain a metal oxide / halogen intercalation carbon nitride heterojunction, and carrying out vacuum calcination on the metal oxide / halogen intercalation carbon nitride heterojunction to obtain metal oxide / halogen intercalation carbon nitride heterojunction composite powder; mixing the metal oxide / halogen intercalation carbon nitride heterojunction composite powder, a polymer carrier and N, N-dimethylformamide to obtain a spinning solution, and performing electrostatic spinning to obtain a nascent fiber membrane; and calcining the nascent fiber membrane to obtain the graphite carbon nitride catalytic membrane material. The preparation method is high in operability, and the prepared material has the characteristics of stable structure and high catalytic efficiency.

The invention relates to the field of adsorption materials, in particular to a discrete carbon-based biological base material for targeted treatment of high-concentration organic wastewater and a preparation process thereof.The discrete carbon-based biological base material is prepared from, by weight, 65-70 parts of activated carbon fibers, 8-10 parts of PLA fibers, 5-7 parts of sodium lignin sulfonate, 5-8 parts of ferroferric oxide magnetic particles and 8-10 parts of a carbon nitride catalyst; biPO4 is doped in the carbon nitride catalyst. According to the discrete carbon-based biological base material, the activated carbon fibers rapidly adsorb organic matters in high-concentration wastewater, the PLA releases a carbon source and accelerates formation of a biological membrane, and the biological membrane is degraded by taking the adsorbed organic matters as a substrate; the carbon nitride catalyst generates active oxygen under visible light to oxidize small molecular acid, and ferroferric oxide magnetic particles catalyze the reaction to break refractory toxins (such as antibiotics); after the reaction, the magnetic field recovers the material, sodium lignin sulfonate protects ferroferric oxide magnetic particles from corrosion, and regeneration performance is provided.

The invention discloses an algae-based iron-carbon catalyst as well as a preparation method and application thereof, and relates to the technical field of new material research and development and sewage treatment. The preparation method comprises the following steps: mixing ferrocene, diatomite and a solvent to obtain a mixed solution; adding a hydrogen peroxide solution into the mixed solution, and then heating for reaction to obtain an intermediate; and roasting the intermediate to obtain the algae-based iron-carbon catalyst. According to the invention, ferrocene and diatomite are used as raw materials, and the high-performance algae-based iron-carbon catalyst is prepared through simple solvothermal reaction and roasting treatment. The obtained algae-based iron-carbon catalyst is stable in structure, high in activity and wide in applicable pH range in a persulfate oxidation system, and can be used for activating persulfate to degrade antibiotic pollutants in water.

The invention relates to the technical field of photocatalytic materials, in particular to a metal single atom loaded defect carbon nitride catalyst and a preparation method and application thereof. The method comprises the following steps: by taking melamine as a nitrogen source, soluble metal salt as a metal source and ethylenediaminetetraacetic acid as a chelating agent, carrying out freeze drying in a solvent system, calcining in a protective atmosphere, and carrying out thermal polymerization, so as to obtain the metal single atom loaded defective carbon nitride catalyst. The metal in the soluble metal salt is copper, iron or manganese. Precise anchoring and high dispersion of metal ions are achieved through complexing of ethylenediamine tetraacetic acid, a stable metal-N coordination structure is formed, metal agglomeration is avoided, a defect structure is constructed synchronously, and the metal monatomic loading capacity is 1 wt.%-7 wt.%. The catalyst can efficiently catalyze and activate peroxymonosulfate and rapidly degrade antibiotic pollutants such as tetracycline, has the advantages of being low in preparation cost, environmentally friendly, high in catalytic activity and high in stability, and is suitable for the field of water pollution remediation.

The application discloses a bimetallic doped hierarchical porous carbon catalyst and a preparation method and application thereof. The bimetallic doped hierarchical porous carbon catalyst is prepared from two transition metal salts and specific biomass powder as raw materials through 160-180 DEG C hydrothermal carbonization and 200-500 DEG C calcination. The catalyst has simple components, is cheap, and has a simple preparation process. The catalyst can efficiently catalyze synthesis of 2,5-furan dicarboxylic acid from 5-hydroxymethylfurfural under mild conditions. The target product has high yield and simple separation, and has a good industrial application prospect.

The invention relates to the field of organic synthesis, in particular to a synthetic method of (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate. The synthesis method of (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate comprises the following steps: mixing a material A, a material B, potassium carbonate, sodium iodide and a solvent, and reacting to obtain a material C; mixing the material C, the material D, triethylamine and a solvent, and reacting to obtain a material E; mixing the material E, ammonia water and a solvent, and reacting to obtain a material F; and mixing the material F, di-tert-butyl dicarbonate, a palladium carbon catalyst and a solvent, and carrying out a reaction to obtain the (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate. The process route is easy to operate and has no special dangerous reaction. Reaction materials are cheap and easy to obtain, and the prepared product is high in purity.

The utility model belongs to the technical field of wastewater treatment, and particularly relates to an iron-carbon catalytic Fenton reaction tank. Comprising a horizontal tank body, two sides of the horizontal tank body are provided with a water inlet and a water outlet, square tanks are distributed in the horizontal tank body and are communicated with one another, the lower part of each square tank is provided with a precipitation hopper, and a joist is fixed above each precipitation hopper. According to the utility model, the plurality of square pools which are transversely arranged are connected in series, a plurality of modularized iron-carbon fillers can be placed in each pool body, and the plurality of square pools can be flexibly provided with adding points of iron-carbon and Fenton hydrogen peroxide, so that the oxidation-reduction capability of an iron-carbon primary battery and the strong oxidation capability of Fenton are fully coupled; meanwhile, the iron-carbon filler of a single module can be hoisted by a walking type electric hoist to check the hardening condition or be replaced, so that the operation flexibility is greatly improved, the problem of maintenance and replacement of iron-carbon scaling is solved, and in addition, on the basis of retaining the original biochemical pool structure, rapid transformation can be realized through the serial pool body.

The invention discloses a preparation method and application of a cobalt-nitrogen-doped mesoporous carbon catalyst, and belongs to the technical field of catalyst preparation, and the preparation method comprises the following steps: mixing and grinding glucose and an SBA-15 mesoporous molecular sieve, pyrolyzing in a nitrogen atmosphere, soaking the obtained product in hydrofluoric acid to remove an SBA-15 template, alternately centrifuging with water and ethanol to obtain a precipitate, and drying to obtain the cobalt-nitrogen-doped mesoporous carbon catalyst. Mesoporous carbon is obtained; the preparation method comprises the following steps: respectively dissolving phenanthroline and cobalt chloride hexahydrate in ethanol, and mixing to form a Co-phen solution; and soaking the obtained mesoporous carbon in a Co-phen solution, evaporating the solvent after soaking, grinding into powder, and carrying out heat treatment in a nitrogen atmosphere to obtain the cobalt-nitrogen doped mesoporous carbon catalyst. The cobalt-nitrogen-doped mesoporous carbon catalyst shows excellent oxygen reduction catalytic activity under the alkaline condition, the half-wave potential reaches 0.873 V and is close to a 4-electron transfer path, and the stability and methanol tolerance are superior to those of a commercial Pt / C catalyst.

The invention relates to the technical field of platinum-carbon catalysts, in particular to a preparation method of a platinum-carbon catalyst. The preparation method comprises the following steps: adding a carbon carrier into a polyol solvent, then adding an acidic dispersing aid, and dispersing to obtain a carbon carrier dispersion liquid; adding a platinum precursor solution into the carbon carrier dispersion liquid, and dispersing to obtain a mixed liquid; adding an alkaline regulator into the mixed solution, regulating the pH value of the system to be alkaline, and dispersing in an inert atmosphere to obtain a liquid mixture; heating the liquid mixture to carry out reduction reaction, then cooling, adjusting the pH value of the cooled product solution to be acidic, and carrying out post-treatment to obtain a solid substance; and heating the solid substance in an inert atmosphere for heat preservation, cooling and grinding to obtain the platinum-carbon catalyst. The carbon carrier dispersion liquid is prepared by jointly mixing the acidic dispersing aid, the carbon carrier and the polyol solvent, so that uniform dispersion and surface property optimization of the carbon carrier are realized, and a foundation is laid for subsequent uniform loading of platinum particles.

The application provides a continuous palladium-carbon hydrogenation reaction method, which is carried out according to the following steps: step one, mixing carbon catalyst with a solvent, and then injecting into the inside of a reactor; step two, connecting and starting a circulating pump to make the inside catalyst partially flow in a circulating mode; step three, injecting p-nitrotoluene and hydrogen, and carrying out heat exchange treatment on the whole reactor through a heat exchanger to keep the temperature stable during the reaction; and step four, discharging the reaction liquid and carrying out filtration treatment. The continuous palladium-carbon hydrogenation reaction method and equipment optimize the catalytic effect of the catalyst, improve the filtration efficiency, ensure that the raw material liquid and hydrogen enter the reactor, make the catalyst freely flow in the whole reaction area without being discharged from the reactor, continuously remove the product from the reactor, keep the temperature stable during the whole reaction process through the heat exchanger, and automatically stir the inside through the hydrogen injection.

The invention discloses titanium-containing leather, which is prepared from a solvent-free PU (polyurethane) mixture prepared by mixing a component A and a component B through blade coating, baking, base cloth attaching and separation processes, and the component A comprises the following components in percentage by mass: 80-85% of polyether polyol, 12-15% of polyester polyol, 2-8% of nano titanium powder, 0.2-0.6% of a zinc-bismuth compound and 0.1-0.4% of a platinum-carbon catalyst. By adding nano titanium powder into a solvent-free PU mixture and combining a specific component ratio and a preparation process, the product has good high temperature resistance, super-strong corrosion resistance and antibacterial property and is suitable for various application scenes such as outdoors, home furnishing, fitness equipment and the like, the leather is endowed with excellent mechanical properties due to the super strength of titanium, the leather is suitable for lightweight design, and the cost is reduced. The leather material has the advantages of high temperature resistance, corrosion resistance, biocompatibility and the like, can be widely applied to the fields of new energy automobiles and aerospace, has excellent biocompatibility, and meets the requirements of scenes such as medical and physical therapy equipment, children products, dining table mats and the like on material safety.

The present application relates to the field of fossil resource recycling and fuel cell catalyst technology, and specifically to a method for preparing a platinum iron carbon catalyst using waste rubber powder, a platinum iron carbon catalyst and its application. The method of the present application comprises: subjecting a first waste rubber powder to pyrolysis treatment to obtain pyrolytic carbon; mixing the pyrolytic carbon with a metal salt, a chelating agent and water to obtain a first mixture; the metal salt comprises a platinum salt and an iron salt; heating the first mixture under stirring to obtain a sol; drying the sol and then calcining it to obtain a catalyst precursor; mixing a second waste rubber powder with a catalyst precursor to obtain a second mixture; subjecting the second mixture to microwave radiation treatment to obtain a platinum iron carbon catalyst. The technical solution of the present application provides a method for preparing a high-activity platinum carbon iron catalyst with a simple process and low cost, and also realizes the high-value recycling of waste rubber.

The invention discloses an iron-carbon catalytic material based on coal gasification slag as well as a preparation method and application of the iron-carbon catalytic material, and belongs to the technical field of industrial solid waste recycling. The preparation method comprises the following steps: adding dried coal gasification slag into an oxalic acid solution for extraction to obtain a suspension A; adding a reducing agent into the suspension A, carrying out precipitation reaction, and then carrying out solid-liquid separation to obtain a solid B; and sintering the solid B to obtain the composite material. The invention further discloses the iron-carbon catalytic material based on the coal gasification slag prepared by the method and application of the iron-carbon catalytic material. According to the method, the industrial solid waste coal gasification slag is used as a carrier, endogenous iron in the coal gasification slag is converted by adopting an acid leaching-reduction precipitation-roasting method, the iron-supported catalytic material with a stable structure and excellent performance is obtained, the process is green, the cost is low, the organic wastewater treatment capacity is excellent, and the practical value is relatively good.

The invention relates to preparation of a vanadium titano-magnetite slag waste derived composite carbon catalytic material and a method for degrading sulfathiazole by activating peroxymonosulfate by using the vanadium titano-magnetite slag waste derived composite carbon catalytic material, and belongs to the technical field of oxidation catalytic materials and environments. The invention aims to solve the technical problem that the existing sulfathiazole widely exists in a water environment and forms a remarkable risk to the environment. The method comprises the following steps: grinding and sieving the vanadium titano-magnetite slag; pouring ammonium chloride, citric acid monohydrate, disodium ethylene diamine tetraacetate and the vanadium titano-magnetite slag sieved in the step 1 into an ethanol solution, and performing ultrasonic dispersion; heating and stirring in a water bath, then drying and grinding, and heating to obtain the powdery magnetic carbon-based material. The composite carbon catalytic material derived from the vanadium titano-magnetite slag is prepared by adopting a vacuum thermal synthesis method. The material can efficiently activate peroxymonosulfate to generate singlet oxygen non-free radical active species, and the degradation of a target pollutant sulfathiazole is accelerated through an efficient electron migration pathway. The catalytic material is applied to advanced oxidative degradation of high-concentration organic matters.

The present invention relates to a Ni / Ir / IrO2 porous carbon catalyst material, its preparation method, and its application. The porous carbon, obtained by oxidizing the precursor Ni-MOF-74, serves as a carrier, with Ir as the active center strongly adsorbed on its surface, and is used as a highly efficient alkaline catalyst. Compared with existing technologies, this invention offers significant physical and chemical advantages, including excellent electrocatalytic activity and stability in the chlorine evolution reaction, a key method for industrial chlorine production.

The invention relates to a ball-milling modified biomass carbon material as well as a preparation method and application thereof, and belongs to the field of electro-catalytic materials. The preparation method comprises the following steps: cleaning, drying and crushing biomass, and collecting 40-100-mesh particles to obtain biomass powder; heating and carbonizing the biomass powder under an inert atmosphere condition, dipping a carbonized product in an acid solution to remove ash, then washing with a washing solution until filtrate is neutral, and carrying out solid-liquid separation to take a solid phase, so as to obtain an activated carbon material; mixing and ball-milling the activated carbon material and ball-milling beads to obtain the ball-milling modified biomass carbon material. The material comes from solid waste, the preparation process is simple, chemical reagents do not need to be added, and the carbon catalyst prepared through the ball milling method has good conductivity and electrocatalytic hydrogen peroxide production performance and is good in stability. Under a neutral condition, the catalyst has high selectivity. In addition, waste lychee shells are used as raw materials, the cost is low, the lychee shells are easy to obtain, and secondary utilization of solid waste is achieved.

The present invention relates to a synthetic method for tert-butyl 4-((4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)methyl)piperidine-1-formate, comprising the following synthetic route: the present invention has the advantage that when performing Witting reaction and boronation reaction, the reaction temperature is low, which helps to reduce the generation of by-products and improve the purity and yield of the product. Based on the synthetic route provided by the present invention, raw materials are more economical and easy to obtain, and expensive palladium-carbon catalysts are not used, which can significantly reduce costs; by accurately controlling the reaction conditions and molar ratio, the yield and purity of the target product are significantly improved; the raw materials and solvents used in the process are mostly environmentally friendly, and the reaction conditions are mild, the process is simple and feasible, and is suitable for the needs of large-scale industrial production.

Disclosed herein are methods of electrochemically producing halogen using an oxygen consuming gas diffusion electrode, referred to herein as an oxygen depolarized cathode (ODC). The electrode can include heteroatom-doped carbon nanostructures as catalysts for both halogen evolving anodes and oxygen depolarized cathodes. Examples of halogens that can be produced include chlorine and bromine by oxidation of the respective halide ions.

This invention provides a composite derived carbon catalyst, its preparation method, and its application, belonging to the field of wastewater degradation technology. The preparation method includes the following steps: immersing denim single-thread fibers in a sodium hydroxide solution for ultrasonic treatment, followed by sequential drying and crushing; immersing fibrous denim in an iron salt aqueous solution, adding sodium hydroxide solution dropwise, and then sequentially allowing it to stand and dry; subjecting the dried product to pyrolysis under a nitrogen atmosphere, and post-treating the carbonized product to obtain the composite derived carbon catalyst. In this invention, iron clusters are uniformly distributed on the surface of the denim fiber-derived carbon, fully exposing active sites and thus providing higher catalytic activity and better degradation effect. This catalyst efficiently degrades various pollutants such as dyes, antibiotics, and phenols in wastewater within a wide pH range of 3-9, exhibiting the advantage of wide applicability.

This invention belongs to the field of catalyst technology, specifically relating to a polyoxometalate-anchored cobalt single-atom catalyst, its preparation method, and its application. The invention uses a polyoxometalate as the anchoring substrate and electronic control unit. First, a cobalt-substituted polyoxometalate precursor is prepared via a coordination reaction, then composited with a ZIF-derived conductive carbon substrate, and finally reduced with hydrogen to obtain the target catalyst. This catalyst effectively inhibits cobalt single-atom aggregation, achieving a cobalt single-atom loading of 3.55 wt%. Under alkaline conditions, it exhibits excellent oxygen reduction catalytic activity, stability, and methanol resistance, with a half-wave potential of 0.826 V. When used in a zinc-air battery, it achieves an open-circuit voltage of 1.48 V and a flow rate of 239.6 mW / cm². 2 With maximum power density and excellent cycle stability, it can replace commercial platinum-carbon catalysts.

This application relates to a heteronuclear bimetallic fuel cell oxygen reduction catalyst, its preparation method, and its application, belonging to the field of catalyst technology. The preparation method of the heteronuclear bimetallic fuel cell oxygen reduction catalyst of this application includes the following steps: S1, dissolving zinc, iron, and other metal sources in an organic solvent, stirring and sonicating to obtain a red mixed solution; S2, dissolving 2-methylimidazole in an organic solvent, stirring until completely dissolved to obtain a transparent mixed solution; S3, slowly adding the transparent mixed solution to the red mixed solution to carry out the reaction, centrifuging and collecting the yellow solid after the reaction is complete, drying and grinding to obtain a precursor powder, and then subjecting the precursor powder to pyrolysis treatment to obtain the heteronuclear bimetallic fuel cell oxygen reduction catalyst. This application selects doping of s- and p-regions with Li, Na, Al, etc., and precisely constructs bimetallic atomic sites to prepare Fe-based bimetallic-nitrogen-carbon catalysts with high intrinsic activity and high stability.

This invention relates to a mesoporous platinum@platinum-nickel core-shell framework nanowire and its preparation method, comprising the following steps: (1) uniformly mixing platinum precursor, nickel precursor, structure directing agent, and reducing agent with a first solvent, and performing a hydrothermal reaction to obtain Pt@Pt-Ni core-shell nanowires; (2) uniformly mixing the Pt@Pt-Ni core-shell nanowires with a second solvent and acetic acid, and performing an etching reaction to obtain etched mesoporous platinum@platinum-nickel core-shell framework nanowires. This invention employs a hydrothermal method, which is simple, reproducible, and allows for batch production with safety. Compared with traditional commercial platinum-carbon catalysts, the catalytic activity is greatly improved, the stability is greatly enhanced, and the production cost is reduced.

A noble metal catalyst, a screening method thereof and a membrane electrode belong to the field of hydrogen fuel cells. The screening method of the noble metal catalyst comprises the following steps: selecting the noble metal catalyst from a platinum elementary substance catalyst, a gold elementary substance catalyst, a palladium elementary substance catalyst, a platinum-carbon catalyst, a gold-carbon catalyst or a palladium-carbon catalyst; the method comprises the following steps: obtaining a first full width at half maximum of a diffraction peak corresponding to a crystal plane (111) of noble metal, obtaining a second full width at half maximum of a diffraction peak corresponding to the crystal plane (111) fitted by a Gaussian function, and screening out the noble metal catalyst meeting the XRD spectrogram requirement according to the condition that the difference value between the first full width at half maximum and the second full width at half maximum is less than 0.4 degree. According to the screening method, the noble metal catalyst with few large noble metal particles and uniform particle size can be obtained through low-cost and rapid screening, and the noble metal catalyst has good catalytic activity and durability.

The invention relates to the field of organic synthesis, in particular to a synthetic method of (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate. The synthesis method of (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate comprises the following steps: mixing a material A, a material B, potassium carbonate, sodium iodide and a solvent, and reacting to obtain a material C; mixing the material C, the material D, triethylamine and a solvent, and reacting to obtain a material E; mixing the material E, ammonia water and a solvent, and reacting to obtain a material F; and mixing the material F, di-tert-butyl dicarbonate, a palladium carbon catalyst and a solvent, and carrying out a reaction to obtain the (2R, 4S)-N-BOC-4-hydroxypiperidine-2-methyl formate. The process route is easy to operate and has no special dangerous reaction. Reaction materials are cheap and easy to obtain, and the prepared product is high in purity.

A sulfur-modified iron-nitrogen-carbon catalyst and its preparation and application. The present application relates to a preparation method of a series of sulfur-doped iron-nitrogen-carbon catalysts with high catalytic activity obtained by changing the addition amount of thiourea in the catalyst synthesis process and its application. Even under the water quality conditions containing a series of high-concentration inorganic anion humic acid, the catalyst can still achieve high-efficiency degradation of hydroxybenzoic acid. The sulfur atom doping plays a very important role in improving the activity of the main catalytically active site Fe-N4 activated persulfate, forming a catalytic reaction system dominated by singlet oxygen active groups, and realizing selective degradation of organic pollutants with different molecular structures, not only meeting the requirements of high catalytic activity, high stability and high adaptability of the catalyst, but also providing an effective preparation method for improving the catalytic activity of the traditional Fe-N4 structure site, which has good prospects in the application field of degrading organic wastewater containing a large amount of complex matrix.

The invention provides a biomass pyrolysis gas self-heating type carbon catalytic reforming carbonization activation gasification system and method, and relates to the technical field of catalytic reforming. The system comprises a gasification furnace and at least one carbonization activation furnace. A synthesis gas outlet of the gasification furnace is connected with the dust removal device and the intercooler; a gas outlet of the intercooler is communicated with the pressure swing adsorption device; cO2-rich gas and CO + H2-rich gas are separated by the pressure swing adsorption device and are respectively stored in a first gas storage cabinet and a second gas storage cabinet; proportional valves are arranged at gas outlets of the two gas storage cabinets, and mixed gas entering a smoke cooling balance gas inlet of a combustor of the energy-supply oxygen-deficient combustion chamber is adjusted and introduced into the energy-supply oxygen-deficient combustion chamber of the carbonization activation furnace for cooling; a combustion cracking gas inlet of a combustor of the energy supply oxygen-deficient combustion chamber is communicated with a gas outlet of the intercooler and a gas collecting assembly of the carbonization activation furnace, and a carbon material and clean fuel gas are produced by mixing an activating agent. The system realizes all-component graded utilization of synthesis gas and closed-loop recovery of heat energy, and solves the problems of waste heat waste, large carbon emission and insufficient temperature control precision in the traditional process.

The invention relates to the technical field of compound synthesis, in particular to a synthesis method of N, N-dimethylaminoethoxyethanol. The synthesis method comprises the following steps: mixing diglycolamine, a formaldehyde aqueous solution, a palladium carbon catalyst and hydrogen, and carrying out methylation reaction. The synthesis method is simple to operate, high in reaction conversion rate, high in product purity and good in economical efficiency.