165 results about "Carbonyl sulfide" patented technology

The invention provides a carbonyl sulfide hydrolysis catalyst and a preparation method thereof. The preparation method comprises the following steps: respectively preparing a K-containing alkaline solution and a samarium salt aqueous solution for later use; dipping the catalyst carrier in a K-containing alkaline solution, and then carrying out a first reaction under a certain condition to obtain a K-loaded catalyst precursor; immersing the catalyst precursor in a samarium salt aqueous solution for a second reaction, and further loading samarium; the carbonyl sulfide hydrolysis catalyst is prepared by the preparation method, and in the carbonyl sulfide hydrolysis catalyst, the mass fraction ratio of K to samarium is (8: 1)-(12: 1). The preparation method provided by the invention has the advantages that the raw materials are cheap and easy to obtain, the method is simple and easy to popularize, a large amount of organic solvents are prevented from being used in the preparation process, the method is more environment-friendly, and the prepared catalyst has the characteristics of higher activity, stronger stability and difficulty in poisoning when being used for catalytic hydrolysis of COS.

The invention discloses a composite material catalyst MFe2O4 / NH2-MIL-68 (In)-x as well as a preparation method and application thereof, and belongs to the technical field of industrial catalysis. NH2-MIL-68 (In) is used as a carrier, spinel type ferrite MFe2O4 is loaded on the NH2-MIL-68 (In) to form the composite material catalyst, M represents Co or Cu, x represents the percentage content of MFe2O4 in the composite material, the value of x is 10-60, and the unit is%. Through effective compounding of the indium-based MOF material and the spinel type ferrite MFe2O4, the advantages of large specific surface area and multiple metal active sites of the indium-based MOF material and the spinel type ferrite MFe2O4 are fully utilized, the synergistic effect of the indium-based MOF material and the spinel type ferrite MFe2O4 in the aspects of gas adsorption and catalytic hydrolysis is exerted, the COS hydrolysis catalytic activity and the reaction rate are improved, the removal rate of COS in waste gas at 120-150 DEG C can reach 92-96%, and the removal rate of COS in waste gas at 120-150 DEG C can reach 92-96%. The catalyst is suitable for medium and low temperature catalytic hydrolysis removal of carbonyl sulfide in benfenacet synthesis waste gas.

The invention discloses a synthesis method and application of a carbonyl sulfide low-temperature hydrolysis catalyst, and the synthesis method comprises the following steps: mixing pseudo-boehmite, ammonium bicarbonate, sodium carbonate and a binder, and granulating to obtain a granular mixture; sequentially drying and calcining the granular mixture, so as to obtain gamma-Al2O3 carrier pellets; and placing the gamma-Al2O3 pellets in an impregnation liquid, carrying out impregnation treatment under pressure, drying, and calcining to obtain the carbonyl sulfide hydrolysis catalyst. According to the invention, gamma-Al2O3 balls are prepared as a carrier, then zirconium, sodium and potassium are loaded on the gamma-Al2O3 balls, gamma-Al2O3 has strong adsorbability to carbonyl sulfide, ZrO2 has good acid resistance and water resistance, and plays a role in protecting the catalyst; the metal such as Na, K and the like exists in the blast furnace gas in the form of carbonate, and the weakly alkaline center reduces the activation energy of the reaction, so that carbonyl sulfide is hydrolyzed into H2S and CO2, and the standard emission of SO2 at the user side of the blast furnace gas is realized by matching with an H2S removal technology.

The utility model belongs to a carbonyl sulfide production device adopting an external electric heater. Comprising a sulfide raw material supply unit, and the sulfide raw material supply unit is connected with a product filling row through a light component removal rectification unit and a heavy component removal rectification unit; a light component removal rectifying tower is arranged in the light component removal rectifying unit, a heavy component removal rectifying tower is arranged in the heavy component removal rectifying unit, and external ammonia electric heating reboiler units are arranged at the inner lower parts of the light component removal rectifying tower and the heavy component removal rectifying tower; the external ammonia electric heating reboiler unit comprises rectifying tower reboilers arranged at the lower parts in the light component removal rectifying tower and the heavy component removal rectifying tower, an inlet of each rectifying tower reboiler is connected with an outlet of an external liquid ammonia electric heater through a pipeline, and an outlet of each rectifying tower reboiler is connected with an inlet of the external liquid ammonia electric heater through a pipeline; the device has the characteristics that the temperature is accurately controlled, and the thermal load of the rectifying tower is stabilized, so that the purity of a product is ensured while sulfide is separated and purified.

The invention discloses a preparation method of an adsorbent for dechlorination and desulfurization of blast furnace gas, which comprises the following steps: adding sodium metaaluminate into an alkaline solution to obtain an aluminum solution, adding silica sol into the alkaline solution to obtain a silicon solution, mixing the aluminum solution with the silica sol, and aging; crystallizing after aging, drying, calcining, and grinding to obtain molecular sieve powder; the molecular sieve powder is sequentially placed in a dopamine solution and a metal salt solution containing phosphoric acid to be impregnated twice, calcination is conducted after impregnation is completed, and the modified molecular sieve adsorbent is obtained. The modified molecular sieve type adsorbent prepared by the method has high carbonyl sulfide and hydrogen chloride adsorption performance.

The invention relates to the technical field of acid tail gas treatment, and discloses a boron-nitrogen-doped aluminum oxide catalyst as well as a preparation method and application thereof. The method comprises the following steps: (1) mixing an aluminum source, a nitrogen source, a boron source and water to obtain a mixed solution, then adding a peptizing agent to adjust the pH of the mixed solution to be acidic, and then standing and aging; (2) drying the material subjected to standing and aging in the step (1), then roasting under protective gas, and then sequentially carrying out high-temperature nitriding and cooling; and (3) carrying out plasma treatment on the material cooled in the step (2). The catalyst prepared by the method has large specific surface area and catalytic activity, can well capture water and carbonyl sulfide, converts carbonyl sulfide into hydrogen sulfide and improves the purity and yield of enriched hydrogen sulfide, and the preparation method of the catalyst is simple and efficient.

To identify the source of abnormal indicator components when characteristic abnormal indicator components other than benzenethiol and carbonyl sulfide are generated within an insulating medium.SOLUTION: Whether an abnormal indicator component generated in an insulating medium due to a discharge abnormality or overheating abnormality of a transformer is included in a pre-established list showing the relationship between materials applied to the transformer and abnormal indicator components generated in the insulating medium due to decomposition of those materials shall be investigated. If the abnormal indicator component is included in the list, the material containing the component shall be selected, and the abnormal site to which the material is applied shall be identified.SELECTED DRAWING: Figure 2

The present invention relates to the technical field of blast furnace gas desulfurization, and specifically relates to an activated carbon-based desulfurizer and a preparation method thereof. The desulfurizer is obtained by this method. This method includes pickling waste activated carbon to obtain modified activated carbon, cerium salt loading, combined loading of iron salt and vanadium salt, anti-chlorine and sulfur treatment, and calcination activation to obtain the desulfurizer. The sulfur capacity of the activated carbon-based desulfurizer prepared by the present invention can be increased to 44% - 48%, and the activation energy for sulfides can also be reduced. It can catalyze organic sulfur and inorganic sulfur at 20 - 50 °C, greatly reducing energy consumption; among them, the removal rates of carbonyl sulfide and carbon disulfide are both greater than or equal to 98%, and the removal rate of H2S is greater than or equal to 99%.

The invention discloses a preparation method of a mesoporous gamma-Al2O3-coated TiO2 core-shell structure catalyst for carbonyl sulfide hydrolysis, and relates to the technical field of catalysts. The preparation method comprises the following steps: step 1, preparing TiO2 monomer gel: step 1-1, gradually adding 1.5 g of a triblock copolymer Pluronic F127, 2.4 ml of acetic acid and 3.2 ml of concentrated HCl into 30.0 ml of tetrahydrofuran (THF) to form a mixture; and step 1-2, dropwise adding 3.0 ml of tetrabutyl titanate (TBOT) into the mixture to form a golden yellow solution, vigorously stirring, transferring the white-yellow solution into two volumetric flasks, and heating and storing in a drying oven. The mesoporous gamma-Al2O3-coated TiO2 core-shell structure catalyst is synthesized by adopting an evaporation-induced self-assembly method, the mesoporous gamma-Al2O3-coated TiO2 core-shell structure which is uniform in structure and stable in performance is prepared, mesoporous TiO2 of a shell layer serves as a leaked oxygen removal protective agent, gamma-Al2O3 serves as an organic sulfur hydrolysis catalyst, and the catalyst can be used for COS low-temperature hydrolysis and can be used for low-temperature hydrolysis of COS. The low-temperature condition of actual industrial requirements of the iron and steel industry is met.

The invention discloses preparation and application of a carbon-based fine desulfurizer for one-step conversion of recyclable carbonyl sulfide into elemental sulfur, and belongs to the field of environmental protection. The preparation method comprises the following steps: (1) dissolving a carbon-nitrogen precursor and a transition metal precursor in a solvent, and carrying out stirring reaction at room temperature; (2) centrifuging the turbid liquid obtained in the step (1), and drying to obtain a solid a; (3) roasting the solid a obtained in the step (2) in an inert atmosphere to obtain a solid b; and (4) carrying out acid pickling and drying on the solid b obtained in the step (3), and then reducing in a reducing atmosphere to obtain the target product carbon-based fine desulfurizer. After the prepared catalyst is treated in a reducing atmosphere, the coordination microenvironment of metal is improved, stable metal-nitrogen active sites are formed, and the metal is effectively prevented from reacting with sulfur element to generate metal sulfate and metal sulfide. The catalyst can be regenerated and used after being purged by high-temperature Ar gas, the catalytic performance of the catalyst is not affected, and the catalyst is superior to a commercial Al2O3 catalyst.

The invention discloses a preparation method of battery-grade lithium sulfide, which comprises the following step: under the condition of oxygen isolation, reacting high-purity carbonyl sulfide serving as a sulfur source with a lithium source to prepare the battery-grade lithium sulfide. The method is low in production cost and simple in process, large-scale production is easy to realize, full-automatic unmanned factories are easy to realize, and the purity of the final product lithium sulfide prepared by using high-purity carbonyl sulfide as the raw material is very high; the raw material supply requirement and the harsh quality requirement of sulfide solid batteries, semi-solid batteries and the like on battery-grade lithium sulfide can be met, and the preparation method is suitable for the preparation requirement of various sulfide lithium batteries.

The present application relates to a kind of for metallurgical coal gas to remove organic sulfur nitrogen-doped catalyst and its preparation method and application, including the following steps: with soluble aluminum salt as carrier, it is prepared with certain proportion of nitrogen source compound mixed solution, then precipitate completely in alkaline environment, after stirring, aging, drying treatment, with high temperature calcination nitrogen-doped Al2O3 catalyst is obtained.The catalyst has more nitrogen site, stronger nitrogen doping capacity, so that the basic center of catalyst increases, improves the catalytic activity when catalytic elimination carbonyl sulfur, while reducing the adsorption of H2S, improves H2S yield, reduces the formation of sulfur, ensures the activity and stability of catalyst, prolongs the life of catalyst.

Compositions and methods for removing hydrogen sulfide, gas phase thiol, carbonyl sulfide, and combinations thereof from a gas / vapor stream are provided by utilizing a renewable formulation medium. The composition may include an activated carbon media (BCT-AC media) treated with a binding complex. The compositions and methods offer advantages over currently known technologies by reducing the number of process steps required and thus reduced capital and operating costs, and eliminating aqueous phase processes that are expensive to run and produce undesired waste by-products. In addition, the provided compositions and methods remove hydrogen sulfide as recoverable elemental sulfur, and are ideally suited for use in gas / vapor reactions in which carbon dioxide may be present, as it has no process or economic impact on the composition or process.

The invention discloses an oxygen-poisoning-resistant alumina-based carbonyl sulfide hydrolysis catalyst, a carbonyl sulfide hydrolysis fixed bed reactor and a carbonyl sulfide hydrolysis method, and aims to solve the problems that when an existing alumina-based catalyst is used for treating feed gas containing trace oxygen, the oxygen poisoning cannot be easily generated; active components are easy to oxidize and sinter, so that the catalyst is inactivated by oxygen poisoning, the service life is short, and the hydrolysis conversion rate is reduced. Comprising an alumina carrier, and an active component and an auxiliary agent which are loaded on the alumina carrier, the alumina carrier is alumina prepared by adopting a sol-gel method, taking aluminum alkoxide as an aluminum source, adding a modifier in a sol forming process, carrying out hydrolysis and polycondensation to form gel, drying and roasting; the active component is composed of an alkali metal active component and a transition metal oxide, and the auxiliary agent is a rare earth metal oxide; based on the total mass of the catalyst, the catalyst comprises the following components in percentage by mass: 10-18% of alkali metal active component, 5-12% of transition metal oxide and 3-8% of rare earth metal oxide.

Disclosed herein are a bed of materials and use of it for removing contaminants not limiting to carbon monoxide, oxygen, carbon dioxide, acetylene, hydrogen, water, carbonyl sulfide and hydrogen sulfide from lower olefins without limiting ethylene.

The present invention discloses a regeneration method for a carbonyl sulfide hydrolysis catalyst, comprising the following steps: (1) impregnating a deactivated carbonyl sulfide hydrolysis catalyst with a carrier of activated carbon in deionized water at 50-80 °C for 2-4 h, filtering and washing with deionized water to obtain a catalyst washed with water; (2) impregnating the catalyst washed with water in an alkali solution for 1-2 h, filtering and washing with deionized water to obtain a catalyst impregnated with the alkali solution; (3) drying the catalyst impregnated with the alkali solution at 80-120 °C for 3-6 h, then passing hydrogen gas through for calcination at 180-450 °C for 3-6 h, and cooling to room temperature to obtain a calcined catalyst; (4) impregnating the calcined catalyst in a solution containing an active component for 4-24 h, carrying out vacuum drying at 80-120 °C for 3-6 h, and then passing nitrogen gas through for calcination at 300-550 °C for 3-6 h to obtain a regenerated carbonyl sulfide hydrolysis catalyst. The regenerated carbonyl sulfide hydrolysis catalyst of the present invention has the advantages of reducing the residual sulfur content on the surface of the deactivated catalyst or reducing sulfation.

The invention belongs to the technical field of gas desulfurization and purification, and relates to a composite solution capable of selectively removing carbonyl sulfide in gas flow and application of the composite solution, the composite solution comprises an amide compound, alkyl alcohol amine and a solvent, and the mass ratio of the amide compound to the alkyl alcohol amine is 2: 3-3: 2; the structural formula of the amide compound is as follows: # imgabs0 #, wherein R1 is an alkane branched chain of which the carbon number is greater than or equal to 2; r2 is an alkane branched chain with an element O or N; and R3 is a substituent group with an aromatic structure. The composite solution is used for selectively removing carbonyl sulfide in a gas flow containing carbon dioxide. Compared with the prior art, the composite solution disclosed by the invention can be used for inhibiting the absorption of carbon dioxide while realizing efficient removal of carbonyl sulfide, so that the regeneration energy consumption is greatly reduced, and deep desulfurization requirements under special occasions can be met.

The invention relates to the technical field of blast furnace gas desulfurization, in particular to an activated carbon-based desulfurizer and a preparation method thereof. The desulfurizer is prepared by the method. The method comprises the steps of acid pickling treatment of waste activated carbon to obtain modified activated carbon, cerium salt loading, ferric salt and vanadium salt combined loading, chlorine-resistant hydrophobic treatment and roasting activation, and the desulfurizer is obtained. The sulfur capacity of the prepared activated carbon-based desulfurizing agent can be increased to 44%-48%, the activation energy on sulfides can be reduced, organic sulfur and inorganic sulfur can be catalyzed at the temperature of 20-50 DEG C, and energy consumption is greatly reduced; wherein the removal rates of carbonyl sulfide and carbon disulfide are both greater than or equal to 98%, and the removal rates of H2S are both greater than or equal to 99%.

The application belongs to the technical field of carbonyl sulfur hydrolysis catalysts, and discloses a high-efficiency sulfur-resistant catalyst for carbonyl sulfur hydrolysis, a preparation method and application thereof.The preparation method comprises the following steps: (1) preparing a porous ceramic carrier containing alumina, titanium dioxide and zirconium dioxide; (2) in-situ growing a metal organic framework material containing lanthanum, bismuth and cerium on the surface of the porous ceramic carrier by using a solvothermal method; (3) performing a calcination treatment on the porous ceramic carrier loaded with the metal organic framework material in an oxygen-containing atmosphere to obtain a catalyst precursor; and (4) performing a reducing gas plasma bombardment treatment on the catalyst precursor to obtain the high-efficiency sulfur-resistant catalyst.The high-efficiency sulfur-resistant catalyst has high-efficiency low-temperature activity, excellent sulfur resistance and long service life.

The invention provides a selective desulfurizer and a method for removing acid gas in gas. The selective desulfurizer comprises the following components in percentage by mass: 30-40% of organic amine A, 10-20% of organic amine B, 5-10% of an additive and 30-55% of water, the organic amine A comprises first organic amine and second organic amine, the first organic amine is methyldiethanolamine, and the second organic amine is monoethanolamine and / or diethanolamine; the mass ratio of the first organic amine to the second organic amine is (1-5): 1; the organic amine B comprises one or a combination of more than two of secondary amine 1, secondary amine 2 and secondary amine 3; the additive comprises one or a combination of more than two of phosphorous acid, hypophosphorous acid, metaphosphoric acid and pyrophosphoric acid. According to the technical scheme, carbonyl sulfide in the raw material natural gas can be selectively removed, carbon dioxide meeting the national standard is reserved, the defects of an existing process are overcome, and an efficient and green novel method is provided for natural gas purification.

The application discloses a resource treatment method of chlorine-containing organic wastewater, which comprises the following steps: mixing a calcium source, an aluminum source and an additive, and then calcining to obtain a calcium-aluminum multi-element compound; adding the calcium-aluminum multi-element compound into the chlorine-containing organic wastewater according to a solid-liquid mass ratio of (0.25-0.4):1, stirring and then standing to obtain a wastewater coagulation product; calcining the wastewater coagulation product to obtain a porous carbon loaded calcium-aluminum chlorine multi-element compound; and using the porous carbon loaded calcium-aluminum chlorine multi-element compound for removal of fluoride ions in fluorine-containing wastewater and / or degradation of carbonyl sulfur in gas. The self-made calcium-aluminum multi-element compound can coagulate the high-chlorine high-concentration organic wastewater in a low amount, and can convert the wastewater from a liquid phase into a solid phase, so that harmless treatment of the wastewater is achieved, and the solidification product can be converted into a high-value-added product for removing fluoride ions in water or hydrolyzing toxic gases in gas, and resource utilization is realized.

The application discloses a water-carbon flux optimization method based on carbonyl sulfide (COS) and sun / solar-induced chlorophyll fluorescence (SIF), and belongs to the technical field of land ecosystem model optimization and application. The application combines COS and SIF observation information, adopts a four-dimensional variation algorithm to perform data assimilation on observation data and simulation data, simultaneously restrains plant photosynthesis processes and gas transmission processes, and then realizes joint optimization of carbon flux and water flux. Meanwhile, the application compares and verifies simulation data before and after optimization and observation data, and proves effectiveness and reliability of the method.

The present invention relates to the technical field of photovoltaic cells, and in particular, to a perovskite cell and a preparation method thereof. A perovskite cell includes a base layer, a composite functional layer, an electrode layer, an interface protection layer, a groove protection layer, and a P3 groove; the interface protection layer includes an organic polymer; the groove protection layer includes a first protection layer located on a partial side wall of the P3 groove, and the first protection layer includes a reaction product of carbonyl sulfide and an organic polymer. By providing the interface protection layer and the groove protection layer, the perovskite cell of the present invention can reduce the influence of laser heat, and dust particles generated during the processing are not easily adhered to the surface of the device; it can effectively prevent moisture in the environment from invading the device structure, thereby improving the overall stability of the battery.

Disclosed herein are beds of materials and their use for removing contaminants, not limited to carbon monoxide, oxygen, carbon dioxide, acetylene, hydrogen, water, carbonyl sulfide, and hydrogen sulfide, from lower olefins, not limited to ethylene.

The invention relates to an application of a diamine compound, the diamine compound has the following molecular structure: in the formula, R1 is at least one of hydroxyl, amido, carbonyl, ester group, sulfydryl or aromatic ring, R2 and R3 are respectively and independently C1-2 alkyl substituent groups, R4 and R5 are C1-4 alkyl or hydroxyalkyl substituent groups, n is 1-5, and n is 1-5; the diamine compound is used for absorbing one or more of carbon dioxide, hydrogen sulfide or organic sulfur. Compared with the prior art, the diamine compound disclosed by the invention can be mixed with other organic amines to prepare a low-energy-consumption desulfurization and decarbonization solvent capable of regulating and controlling reaction heat, and the solvent can be applied to absorption and removal of acidic components such as carbon dioxide, hydrogen sulfide and organic sulfur in petrochemical gases such as natural gas, oilfield associated gas and refinery gas; the regeneration energy consumption can be obviously reduced on the premise of effectively removing carbon dioxide, hydrogen sulfide and carbonyl sulfide.

The application discloses an iron-based catalyst for efficiently synthesizing carbonyl sulfur and a preparation method thereof. The iron-based catalyst is obtained by mixing inorganic iron salt, inorganic nickel salt, a template agent and urea, using a hydrothermal synthesis method and high-temperature calcination. In the process of calcination, the organic molecules in the precursor are decomposed at high temperature and discharged into the environment in the form of gas, promoting the formation of a pore structure of the catalyst. The synthesis method has simple synthesis conditions, rapid reaction, short time consumption, and the obtained catalyst has a carbonyl sulfur conversion rate as high as 100% at 450 DEG C, and is suitable for efficient production of carbonyl sulfur gas.

This disclosure relates to a two-stage purification method and system for fuel cell-grade hydrogen. The method involves first passing high-purity hydrogen feedstock purified from a PSA unit through a desulfurization unit to adsorb trace amounts of sulfides (such as hydrogen sulfide and carbonyl sulfide), and then introducing the desulfurized hydrogen into a decarbonization unit to adsorb trace amounts of carbon monoxide. This achieves effective removal of trace sulfides and carbon monoxide from the high-purity hydrogen. During operation, this method effectively adsorbs sulfides and carbon monoxide without requiring continuous pressure swing cycle adsorption. It offers a longer single adsorption cycle, more convenient operation, and easier start-up and shutdown. This method improves hydrogen purity and ensures hydrogen yield while simultaneously producing hydrogen for fuel cells.

The application discloses a normal-temperature gas-phase fine desulfurizer and a preparation method thereof, and belongs to the field of gas purification and desulfurization. 2 The specific surface area of the normal-temperature gas-phase fine desulfurizer is greater than or equal to 168 m 2 / g, and the breakthrough sulfur capacity is greater than or equal to 20.6%. The normal-temperature gas-phase fine desulfurizer has high specific surface area and high breakthrough sulfur capacity, can deeply adsorb hydrogen sulfide, mercaptan and carbonyl sulfur in gas-phase materials such as natural gas and synthetic gas at normal temperature, reduces the sulfide in raw gas to below 5 ppb, and realizes excellent desulfurization effect. Moreover, the preparation method of the normal-temperature gas-phase fine desulfurizer is simple in operation and is beneficial to actual production.

The invention relates to the field of gas purification, and discloses a method for purifying natural gas, which comprises the following steps: (1) in the presence of a microbial agent, converting organic sulfur contained in crude natural gas into hydrogen sulfide and a first inorganic sulfur-containing solution in a first alkaline aqueous solution; (2) contacting the obtained hydrogen sulfide with a second alkaline aqueous solution to obtain a second inorganic sulfur-containing solution and purified natural gas; (3) mixing the first inorganic sulfur-containing solution and the second inorganic sulfur-containing solution, and purifying to obtain a purified barren solution; wherein the content of hydrogen sulfide in the crude natural gas is 2000-6000 mg / m < 3 >, the content of carbonyl sulfide is 70-300 mg / m < 3 >, and the content of methyl mercaptan is 25-110 mg / m < 3 >; the microbial agent comprises pseudomonas and / or rhodococcus. The process has relatively high treatment efficiency on natural gas with relatively high concentration of hydrogen sulfide and organic sulfur, hydrogen sulfide, carbonyl sulfide and methyl mercaptan.

The invention discloses a high-stability hydrolysis catalyst for removing carbonyl sulfide in blast furnace gas at a low temperature as well as a preparation method and application of the high-stability hydrolysis catalyst, and belongs to the technical field of carbonyl sulfide removal. The preparation method comprises the following steps: preparing MgO nanoparticles; the preparation method comprises the following steps: dissolving Nd (NO3) 3.6 H2O and Al (NO3) 3.9 H2O in deionized water, uniformly stirring at normal temperature until the Nd (NO3) 3.6 H2O and the Al (NO3) 3.9 H2O are completely dissolved, then adding MgO nanoparticles into the mixed solution, ultrasonically stirring, oscillating and dehydrating the obtained mixture to obtain white powder, drying and roasting to obtain the product. The preparation method is simple, the prepared catalyst has a large specific surface area, many alkaline active sites and good photocatalytic characteristics, compared with an existing COS removal technology and an existing photo-thermal concerted catalytic hydrolysis technology, COS can be efficiently removed at a low temperature, reaction energy consumption is reduced, and the method is suitable for industrial production. The method has a wide application prospect in efficient removal of COS.