1173 results about "Hydrogen sulphide" patented technology

The invention relates to the field of biomedical materials, discloses a hydrogen sulfide / nitric oxide synergistic anti-inflammatory and anti-coagulation repair promoting coating as well as a preparation method and application thereof, and provides a coating with anti-inflammatory, anti-coagulation and tissue repair promoting functions through the synergistic effect of hydrogen sulfide and nitric oxide. The coating comprises a hydrogen sulfide donor which can spontaneously release hydrogen sulfide or a precursor thereof or release hydrogen sulfide under external stimulation; the coating further comprises a component capable of catalyzing the release of nitric oxide from the endogenous nitric oxide donor. The coating is covalently connected with the surface of a base material through a chemical means to form firm interface bonding; and the coating has a multi-cross-linked network structure, so that the coating is endowed with good stability, and long-term functional application of the coating on the surface of a biomedical material is ensured. The method can be widely applied to surface modification of biomedical materials, especially coating functionalization of implanted instruments such as valve clips, intravascular stents, heart valves, occluders, vascular grafts and myocardial patches.

The invention belongs to the technical field of preparation of hydrogen sulfide stress corrosion resistant oil well pipes, and relates to a 125ksi steel grade hydrogen sulfide stress corrosion resistant oil well pipe material suitable for a normal temperature environment containing 1MPa H2S and a preparation method of the 125ksi steel grade hydrogen sulfide stress corrosion resistant oil well pipe material. B, Ti, V and Nb elements are added, and the contents of Si, Mn and Ni elements, the Cr / Mo ratio and the sum of Nb, V and Ti in steel are controlled; the refined 100% sorbite structure, various compounds and microalloying are obtained through the processes of pure steel smelting, forging, controlled rolling and secondary heat treatment, so that high strength and high toughness in the 125 ksi range are obtained, and meanwhile the hydrogen sulfide corrosion resistance is high. The pipe product obtained by the process method disclosed by the invention has no corrosion cracking phenomenon after being subjected to a corrosion resistance test under the partial pressure of hydrogen sulfide of 1MPa.

Disclosed are a resin substrate-based iron oxyhydroxide desulfurizing agent and a preparation method therefor, falling within the technical field of gas purification and treatment. In the present disclosure, sodium percarbonate is used as a raw material to prepare iron oxyhydroxide. Sodium percarbonate serves both as an alkaline precipitant and as an oxidant. P-aminophenol and formaldehyde are subjected to condensation polymerization to form linear phenolic resin, which is then modified with terephthalyl alcohol to connect into a cross-linked network structure resin. The resin is used as a substrate to obtain the resin substrate-based iron oxyhydroxide desulfurizing agent. The preparation method of the present disclosure is simple and achieves a larger sulfur capacity and desulfurization efficiency, making it suitable for the removal of hydrogen sulfide from waste gas.

The invention discloses a rectification mechanism and a carbon disulfide production system containing the same. The rectification mechanism comprises an integrated rectification tower, and an inner cavity of a shell of the integrated rectification tower is sequentially divided into a function-integrated pre-separation and sulfur removal area, a main rectification and hydrogen sulfide removal area and a condensation reflux area from bottom to top in the vertical direction; the pre-separation and sulfur removal area comprises a settling tank arranged at the lower part of the shell, a gathering cover arranged above the inner wall of the settling tank, and a gas rising pipe I arranged above the gathering cover; the invention belongs to the technical field of chemical separation, and achieves the technical effects that multi-stage functions of pre-separation, main rectification, precise purification, final condensation and the like are innovatively integrated in a single tower, so that the fundamental simplification and compactness of the equipment structure are realized; in the traditional process, separate coarse removal, fine removal and finished product towers are replaced by unique expanded settling tanks in the towers, filler layers of integrated plate heat exchangers, tower tops with spiral condensation channels and side-draw systems.

The invention provides a nitrogen-sulfur double-doped layered manganese dioxide material as well as a preparation method and application thereof, and relates to an electrochemical energy storage material. Thiourea is placed in a first temperature area, manganese dioxide is placed in a second temperature area (150-200 DEG C), the thiourea is decomposed into hydrogen sulfide and ammonia gas in the first temperature area, the hydrogen sulfide and the ammonia gas are carried by carrier gas to be conveyed into the second temperature area to be subjected to doping reaction with the manganese dioxide, and the nitrogen-sulfur double-doped layered manganese dioxide material is obtained. The manganese dioxide is delta-phase layered manganese dioxide. Nitrogen and sulfur elements are doped into manganese dioxide through a low-temperature roasting method, the intrinsic conductivity and structural stability of manganese dioxide are improved, the material has high reversible capacity, and the formation of part of oxygen vacancies can help the material expose active sites, so that the overall capacity of the material is improved. The nitrogen-sulfur double-doped layered manganese dioxide material is used as a positive electrode material for a zinc ion battery, and has excellent electrochemical performance.

The invention discloses an oil field desulfurizer and a preparation method thereof. The preparation method comprises the following steps: dissolving 1, 3-propane sultone in toluene, dropwise adding equimolar 1-methylimidazole under an ice-water bath, and heating to room temperature for reaction after dropwise adding; separating out a product after the reaction is finished, and dropwise adding equimolar concentrated sulfuric acid to obtain imidazole ionic liquid; mixing the imidazole ionic liquid with a catalytic promoter to obtain a catalyst; the preparation method comprises the following steps: adding paraformaldehyde, a triazine compound and a catalyst into a solvent, heating to 50-90 DEG C, controlling a reflux reaction for 6-9 hours, and after the reaction is finished, carrying out reduced pressure distillation to remove the solvent and separate out the catalyst, thereby obtaining the oil field desulfurizer. The desulfurizer is a modified triazine compound with a novel structure, N and lateral branch functional groups on a triazine ring of the desulfurizer can react with hydrogen sulfide, and compared with a conventional triazine desulfurizer, a plurality of desulfurization points are added, so that the sulfur capacity is greatly improved.

The invention discloses a device and a method for synchronously removing hydrogen sulfide waste gas and nitrate wastewater by using a sulfur autotrophic denitrification technology, and belongs to the technical field of biological deodorization and sewage treatment. The device mainly comprises a water tank, a sequencing batch reactor (SBR), a washing tower, a water pump, a fan and the like which are connected in sequence. The method comprises the following steps: the discharged hydrogen sulfide waste gas enters a washing tower and is contacted and absorbed with circularly flowing absorption liquid to form mixed liquid mainly comprising S < 2-> and S < 0 >; the mixed solution and nitrate wastewater (or secondary effluent of a municipal sewage treatment plant taking nitrate nitrogen as a main pollutant) enter an SBR (sequencing batch reactor) together, and autotrophic nitrogen removal is carried out through a sulfur autotrophic denitrification way by taking reduced sulfur (S2-and S0 as main components) in the mixed solution as electron donors. According to the method, the hydrogen sulfide waste gas and the nitrate waste water are economically, efficiently and synchronously removed finally, and a brand new thought is provided for combination of biological deodorization and deep denitrification of urban sewage.

The invention discloses an experimental device and an experimental method for researching a hydrogen sulfide elutriation mechanism of a sulfur-containing gas reservoir, and belongs to the technical field of natural gas exploitation, the experimental device for researching the hydrogen sulfide elutriation mechanism of the sulfur-containing gas reservoir comprises an artificial core model; at least one acquisition element; and at least one pipe body part and an injection-production assembly. By arranging the pipe body part composed of the inner pipe part and the outer pipe part which can rotate oppositely, the position relation between the inner outlet set on the inner pipe part and the outer outlet set on the outer pipe part can be correspondingly adjusted through relative rotation between the inner pipe part and the outer pipe part, so that the pipe body part and the artificial rock core model are communicated at different layer positions, and the artificial rock core model can be conveniently and rapidly constructed. Therefore, the control operation of the gas injection-production layer is realized, and the simulation of different reservoirs is realized.

The invention discloses a brain-targeted active oxygen responsive hydrogen sulfide donor liposome, a preparation method and an application, and belongs to the technical field of pharmaceutical preparations, the structure of the brain-targeted active oxygen responsive hydrogen sulfide donor liposome comprises a lipid material and a hydrogen sulfide donor encapsulated in the lipid material, the lipid material comprises phospholipid, cholesterol, active oxygen sensitive lipid and brain-targeted lipid, and the lipid material comprises phospholipid, cholesterol, active oxygen sensitive lipid and brain-targeted lipid. The active oxygen sensitive lipid comprises a phospholipid lipophilic part, a polyethylene glycol hydrophilic part and an active oxygen sensitive bond, and the brain-targeted lipid comprises a phospholipid lipophilic part, a polyethylene glycol hydrophilic part and brain-targeted peptide. The hydrogen sulfide donor lipidosome can penetrate through a blood brain barrier, target neuronal cells, respond to an active oxygen environment of a focus part and sensitively release a hydrogen sulfide donor, so that hydrogen sulfide is distributed in the focus neuronal cells, active oxygen and active nitrogen substances are effectively removed, oxidation and nitration stress are inhibited, and damage and death of the neuronal cells are reduced; the growth and functional recovery of neuronal cells are promoted, and the application prospect in the aspect of treating central nervous system injury diseases is good.

The invention discloses a method for preparing 12-mercaptan through solid organic acid catalysis, belongs to the technical field of 12-mercaptan preparation, and aims to solve the problems of low catalyst activity, harsh reaction conditions, serious pollution, high cost and dependence on import in the prior art. N-dodecanol and hydrogen sulfide are used as raw materials and are mixed according to the molar ratio of 1: 1.2-1: 1.3; the method comprises the following steps: gasifying n-dodecanol, mixing with purified hydrogen sulfide, preheating to 210-240 DEG C, introducing into a fixed bed reactor filled with a solid organic acid catalyst, and reacting at-0.08-3.0 MPa for 3.5-4 hours; and cooling and condensing the reaction product, carrying out gas-liquid separation, rectifying and purifying the liquid product to obtain 12-mercaptan with the purity of more than or equal to 99.5%, and recycling unreacted hydrogen sulfide. The solid organic acid can be a catalyst of p-toluenesulfonic acid and the like or mesoporous silica loaded nickel, cobalt and molybdenum metal oxides. The method has the advantages of high catalytic activity, mild reaction conditions, high product yield (the conversion rate of n-dodecanol is greater than or equal to 94.5%), environmental protection and low cost, can realize the domestic mass production of 12-mercaptan, and meets the market demand.

The invention provides high-toughness hydrogen sulfide corrosion-resistant steel for a seamless steel pipe for drilling and production, a production method of the high-toughness hydrogen sulfide corrosion-resistant steel, a seamless steel pipe heat treatment process and application of the high-toughness hydrogen sulfide corrosion-resistant steel. The high-toughness hydrogen sulfide corrosion-resistant steel comprises the following components: 1.00-1.30% of Cr, 0.50-0.70% of Ni, 0.90-1.10% of Mo, 0.020-0.050% of Al, 0.10-0.20% of V, 0.10-0.20% of Nb, 0.20-0.25% of C, 0.15-0.30% of Si, 0.50-0.70% of Mn, less than or equal to 0.010% of P, less than or equal to 0.0015% of S and the balance of Fe and inevitable impurities. A Cr-Mo-Ni system is adopted and supplemented with microalloy elements such as Nb and V to improve the obdurability and improve the SSC resistance. And through two times of thermal refining, the dislocation density of the material is reduced, and the loading strength of a NACE TM0177 standard A solution is met.

The invention relates to a spherical hydrotalcite phase desulfurization adsorbent as well as a preparation method and application thereof, the preparation method comprises the following steps: mixing an iron source, a nickel source and organic carboxylate, and then carrying out hydrothermal carbonization reaction to obtain the spherical hydrotalcite phase desulfurization adsorbent. The nickel source and the iron source are selected as the raw materials, hydroxide radicals of laminates and carbonate ions between the laminates of the prepared hydrotalcite phase desulfurization adsorbent can increase the alkalinity of the surface of the desulfurization adsorbent and improve the adsorption capacity to hydrogen sulfide, and meanwhile, the hydrotalcite phase desulfurization adsorbent can react with hydrogen sulfide in a catalytic oxidation manner, so that the removal efficiency is improved. Organic carboxylate is selected as a hydrothermal auxiliary agent, carboxylate radicals can chelate metal ions through multidentate coordination to form a stable complex, so that the nucleation rate of hydrotalcite is delayed, the particle size uniformity is improved, meanwhile, a carbon coating layer is generated through hydrothermal carbonization, and pores in the carbon coating layer and pores in hydrotalcite can form hierarchical pore channels, so that the composite material is prepared. The mass transfer efficiency is synergistically improved, so that the adsorption capacity of the adsorbent is improved.

A method for synergistically preparing lithium sulfide by vacuum molten salt based on hydrogen sulfide-lithium salt reaction belongs to the technical field of battery materials, and comprises the following steps: placing a lithium salt solid in a reactor, introducing a molten salt medium on the surface of the lithium salt or in a reaction system, introducing purified hydrogen sulfide gas under a vacuum auxiliary condition, controlling the reaction temperature to be 200-500 DEG C, and reacting for 1-2 hours; and adjusting the flow rate of hydrogen sulfide to be 50-1000mL / min and the retention time to be 5-180min, continuously exhausting gas to discharge water vapor in the reaction process, stopping introducing hydrogen sulfide gas after the reaction is finished, cooling the system to room temperature under the protection of inert gas, taking out the product, washing to remove residual fused salt, and carrying out vacuum drying to obtain the high-purity lithium sulfide. The prepared lithium sulfide has high purity (greater than or equal to 99.90%), low defect density and an excellent crystal structure, and can be widely applied to lithium-sulfur batteries, all-solid-state batteries and novel energy storage technologies, so that the energy density is improved, the cycle life is prolonged, and the energy consumption is reduced.

The utility model discloses a wet-process phosphoric acid purification and arsenic removal system, and relates to the technical field of wet-process phosphoric acid purification and impurity removal. The system comprises a phosphoric acid raw material tank, a Venturi jet reactor, a tubular washing absorber, a reaction washing curing tank and a hydrogen sulfide reactor which are sequentially connected, wherein the hydrogen sulfide reactor is also communicated with the Venturi jet reactor; the reaction washing and curing tank is communicated with an arsenic removal filtering assembly; and the arsenic removal filtering assembly is communicated with the phosphoric acid raw material tank. The problems that an existing arsenic removal system is large in sodium sulfide adding amount, hydrogen sulfide leakage is prone to occurring, the system is complex, and the arsenic index is difficult to control flexibly are solved.

A method for providing a fuel includes removing hydrogen sulfide and / or carbon dioxide from biogas to provide partially purified biogas, which is filled in a mobile storage system. The partially purified biogas is transported to a centralized processing facility, in the mobile storage system, by truck, rail, or ship. At the centralized processing the partially purified biogas is further processed, either to produce a fuel that is renewable or has renewable content, or to produce renewable natural gas, which is used to produce the fuel that is renewable or has renewable content.

The invention discloses a preparation method and application of a CoxSy catalyst, and belongs to the technical field of catalyst preparation. According to the method, the morphology of CoxSy is regulated and controlled by using different solvents, so that four CoxSy catalysts with different morphology characteristics are synthesized. The catalyst is simple in preparation method and high in repeatability. The obtained CoxSy catalyst has a high specific surface area, more active sites can be exposed, reaction raw materials are in full contact with the active sites of the catalyst, and meanwhile, the catalyst has relatively high sulfur tolerance and rich sulfur vacancies, and is beneficial to adsorption and activation of H2S and CO2. Therefore, the obtained CoxSy catalyst shows high catalytic activity in a reaction for preparing methyl mercaptan through H2S and CO2 hydrogenation.

The invention discloses a fluorescent covalent organic framework material for hydrogen sulfide detection as well as a preparation method and application thereof, relates to a covalent organic framework material as well as a preparation method and application thereof, and aims to solve the technical problems that an existing porous material for H2S detection is few in structure type, unstable in COFs (Covalent Organic Frameworks) structure, high in detection limit and harsh in detection environment. The periodic structure fragment of the fluorescent covalent organic framework material for hydrogen sulfide detection is shown in the specification. 3-(5, 10-diamino-1H-phenanthrene) [9, 10-d] imidazole-2-yl) phenol and 2, 4, 6-tri (4-formylphenoxy)-1, 3, 5-triazine are subjected to a reaction to obtain a hydroxyl intermediate, the hydroxyl intermediate is modified with 2, 4-dinitrofluorobenzene, and the fluorescent material is used for qualitative detection of H2S. The method is not interfered by amino acids and anions in the environment, and is not influenced by an acid-base environment. The method can be used in the field of H2S detection.

Provided is a hydrogen sulfide removing agent that can be stably used while maintaining hydrogen sulfide removing ability equivalent to that of a hydrogen sulfide removing agent comprising an amorphous iron oxyhydroxide. This iron oxyhydroxide-based hydrogen sulfide removing agent contains amorphous iron oxyhydroxide and a crystalline component. The content of the amorphous iron oxyhydroxide is not less than the content of the crystalline component.

The invention discloses a ginsenoside hydrogen sulfide donor derivative as well as a preparation method and application thereof, and belongs to the technical field of natural medicines and medicinal chemistry. According to the invention, a series of ginsengenin hydrogen sulfide donor derivatives are designed and synthesized by taking ginsengenin as a lead compound, and the myocardial protection activity of the synthesized derivatives is tested; results show that the ginsenoside hydrogen sulfide donor derivative prepared by the invention has relatively good heart protection activity for treating myocardial ischemia, arrhythmia and myocardial infarction, and has the potential of serving as a heart protection medicine.

The invention relates to a CuKMoS2 / SiO2 catalyst for synergistically preparing methyl mercaptan from carbon dioxide and hydrogen sulfide. By introducing a small amount of copper (Cu) into a KMoS2 / SiO2 catalyst system, the selectivity of the catalyst to a reaction intermediate product methanol (CH3OH) is remarkably improved, so that the generation selectivity to a target product methyl mercaptan (CH3SH) is improved. The introduction of Cu promotes the electron transfer of active sites on the surface of the MoS2 catalyst, and optimizes the reaction path. The invention provides a preparation method of a catalyst with high efficiency, good selectivity and strong stability and a new process applied to methyl mercaptan production.

The invention provides a method for preparing phosphorus pentafluoride, which comprises the following steps: (a) mixing sulfur and phosphorus, and reacting at the temperature of 320-340 DEG C to generate phosphorus pentasulfide; (b) reacting phosphorus pentasulfide with hydrogen fluoride gas at the temperature of 170-190 DEG C, cooling the reaction product to-85 to-60 DEG C, and performing low-temperature rectification separation to obtain pure phosphorus pentafluoride and byproduct hydrogen sulfide; the molar ratio of phosphorus pentasulfide to hydrogen fluoride gas is (1-9.5): 10.2. The phosphorus pentafluoride can be efficiently prepared in an environment-friendly manner by adjusting the reaction conditions and the raw material ratio and reacting the easily available raw materials; and moreover, an electrolysis technology is further introduced to treat the hydrogen sulfide byproduct, so that the purity and efficiency of sulfur recovery are optimized, the purposes of environment-friendly and efficient recovery and utilization of the byproduct are achieved, the overall economical efficiency and safety of the process are improved, and the whole process chain is further perfected.

The invention provides a preparation method and application of a catalyst for selective production of ethanethiol. The catalyst comprises an active component, an auxiliary agent and a molded alumina carrier, the active component comprises the following components in percentage by mass: 5-10% of VIII group transition metal oxide and 15-20% of VIB group metal oxide, and the auxiliaries comprise 0.5-4% of alkali metal, 1-3% of alkaline earth metal oxide, 0.6-2% of cerium oxide and 1-4% of phosphorus pentoxide. A bifunctional catalyst with moderate Lewis acid-base sites is constructed by compounding a multi-component aid and an active component, and the catalyst shows excellent catalytic activity that the ethylene conversion per pass is greater than or equal to 98%, the ethanethiol selectivity is about-95% and the ethanethiol yield is-90% under the reaction conditions that the hydrogen sulfide / ethylene feeding mass ratio is 3-5, the temperature is 180-210 DEG C, the pressure is 0.5-1.0 MPa and the volume space velocity is 200-300 h <-1 >. And the catalyst can stably run for 1250 hours or more.

The present invention provides a method for preparing lithium sulfide and lithium sulfide, so as to prepare a high-purity lithium sulfide without increasing the purification cost. The method includes: keeping thiourea and lithium hydroxide warm under a first condition to obtain a mixture; wherein, the first condition includes a heat preservation temperature of 130-180 °C; reacting the mixture with hydrogen sulfide under a second condition to obtain lithium sulfide; wherein, the second condition includes a temperature condition of 500-760 °C.

The invention discloses a glucose-responsive hydrogen sulfide release cascade nano-enzyme as well as a preparation method and application thereof. The cascaded nano-enzyme takes BSA as a growth template and a carrier, and FeS and Au nano-particles are loaded. The FeS-coated Au is synthesized by adopting a biomineralization method, so that the co-loading of FeS and Au is realized, and good biocompatibility is achieved. Meanwhile, by combining the peroxidase-like activity of FeS and the glucose oxidase-like activity of Au, glucose can be catalyzed in a cascade manner to generate toxic hydroxyl free radicals, and drug-resistant bacteria are efficiently killed. In addition, the FeS (at) Au cascade nano-enzyme has a hydrogen sulfide gas release function, and can promote vascular regeneration by up-regulating a hypoxia inducible factor-1 pathway. The cascade nano-enzyme responding to the hyperglycemia microenvironment is combined with a gas treatment mechanism, blood glucose can be effectively consumed, drug-resistant bacterium infection can be eliminated, revascularization can be promoted, and a new strategy is provided for treatment of diabetes wounds infected by drug-resistant bacteria and regeneration of skin tissues.

A thin-film composite membrane incorporating a gas separation layer from a polyphenylene ionomer, a nonporous high-diffusion rate layer, and a porous layer support is disclosed. The thin-film composite membrane may be used in a process to separate carbon dioxide, sulfur dioxide, hydrogen sulfide, or an alkene from a mixture with a less permeable component in a gaseous feed stream.

The ultrahigh-strength hydrogen sulfide corrosion resistant X100 pipeline steel coil plate comprises the following chemical components in percentage by weight: 0.03 to 0.07 percent of C, 0.1 to 0.3 percent of Si, 1.4 to 1.75 percent of Mn, less than or equal to 0.01 percent of P, less than or equal to 0.001 percent of S, 0.01 to 0.03 percent of Ti, 0.08 to 0.11 percent of Nb, 0.2 to 0.4 percent of Cr, 0.2 to 0.5 percent of Mo, 0.5 to 0.9 percent of Ni, 0.25 to 0.50 percent of W, more than or equal to 1.15 percent of Ni + Cr + W, more than or equal to 1.00 percent of Ni / W, more than or equal to 1.65 percent of Ni / Cr, 0.02 to 0.05 percent of Als, 0.002 to 0.006 percent of Ca, less than or equal to 0.008 percent of N and the balance of Fe and inevitable elements. And a low-carbon high-niobium microalloy design is adopted, so that the HIC resistance is good.

The invention discloses an industrial manufacturing method of a thin-gauge high-strength low-yield-ratio H2S-corrosion-resistant hot-rolled plate coil and discloses a specific production process flow, and the hot-rolled plate coil comprises the following chemical components in percentage by mass: 0.035%-0.055% of C, 0.10%-0.20% of S i, 1.00%-1.20% of Mn, less than or equal to 0.015% of P, less than or equal to 0.0015% of S, 0.03%-0.05% of Nb, less than or equal to 0.30% of Cr + T i, 0.02%-0.06% of Al and the balance of Fe and inevitable impurities. According to the component design, low-carbon C-Mn steel is used as a main component, trace Nb, Cr and the like are added for alloying, and the steel for the ERW welding pipe with low yield ratio and welding pipe forming performance, hydrogen induced cracking resistance and hydrogen sulfide stress cracking resistance is obtained by combining an ultra-low sulfur smelting control technology and a TMCP controlled rolling and controlled cooling technology.

The present invention relates to a method for preparing lithium sulfide, according to the present invention, when preparing lithium sulfide by a reaction between a lithium raw material and hydrogen sulfide, the reaction is carried out under relatively mild conditions compared to the prior art, so that frequent maintenance or replacement due to corrosion and failure of a reactor and various pipes is not required, thereby improving the economical efficiency of the process. Further, by reusing the unreacted hydrogen sulfide from which moisture has been removed and the solvent, process costs can be reduced, and economical efficiency can be ensured during mass production. Furthermore, moisture and water vapor generated in the lithium sulfide generation reaction are effectively removed, thereby preventing a reverse reaction for generating lithium hydroxide, promoting a positive reaction, and producing high-quality lithium sulfide with high purity and high yield. In addition, the particle size can be adjusted in units, and a separate pulverizing space or pulverizing table is not required, so that convenience and mass productivity are excellent.

A process for stabilizing nutrients in anaerobic digestate involves removing hydrogen sulfide and ammonia from biogas. This process involves circulating the digestate in a column and contacting it with the biogas. Additional ammonium bisulfite, ammonia, and / or sulfur dioxide may be added to the contacting device to remove hydrogen sulfide from the biogas. The reactions will create ammonium bisulfite, ammonium sulfite, and ammonium thiosulfate to prevent ammonia and hydrogen sulfide emissions to allow for land application.

The invention belongs to the technical field of coke oven gas purification treatment, and particularly discloses a method for removing hydrogen sulfide in coke oven gas through photocatalysis, generation of oxygen vacancies is promoted by adopting a synthesis concept of synergistic effect of silver doping and polyethyleneimine, polyethyleneimine provides an alkaline condition on one hand, lone electron pairs on nitrogen are coordinated with zinc on the other hand, and the hydrogen sulfide in the coke oven gas is removed through photocatalysis. The preparation method comprises the following steps: by taking H2S and polyethyleneimine as raw materials, generating abundant oxygen vacancies under the synergistic effect of the H2S and silver, preventing agglomeration of generated ZnO and increasing reaction sites by taking polyethyleneimine as a surfactant, and then promoting a cascade reaction between ZnO < 1-x > and H2S by taking abundant oxygen vacancies, so that a 1D / 3D-ZnS / ZnO heterojunction is generated in situ to further reduce recombination of photo-generated electron holes; the catalyst converts H2S into elemental sulfur through photo-induced electrons and holes, and a carbon disulfide solution is used for cleaning the catalyst to realize regeneration of the catalyst. The method provided by the invention not only improves the removal efficiency of H2S, but also reduces the operation cost and reduces environmental pollution.