575results about "Sulfur preparation/purification" patented technology

A process system and process method for treating hydrogen sulfide-containing acid gas. The process system comprises a sulfur recovery unit, a tail gas treatment unit having an acid gas concentration function, and a flue gas alkaline scrubbing unit. The method comprises: subjecting sulfur-containing tail gas to concentration treatment by means of an absorption column (1) of the tail gas treatment unit, and then introducing same into the sulfur recovery unit to undergo a Claus reaction for separation, so as to obtain sulfur and sulfur recovery tail gas; introducing the sulfur recovery tail gas into the tail gas treatment unit, successively carrying out combustion and hydrotreating, and introducing the obtained gas into the absorption column (1) of the tail gas treatment unit; and in the tail gas treatment unit, introducing gas absorbed by the absorption column (1) into the flue gas alkaline scrubbing unit, and successively carrying out incineration and alkaline scrubbing, so as to discharge desulfurized gas. The content of SO2 in the tail gas treated by the process system is ≤50 mg / Nm3, and the requirements for full-period standard reaching of sulfur dioxide emission of tail gas during startup, shutdown and normal operations can be satisfied.

The invention discloses a silicon-carbon material and a preparation method and application thereof, belongs to the technical field of negative electrode materials, and overcomes the defect of high volume expansion rate of a silicon-based material in the prior art. The silicon-carbon material provided by the invention comprises porous carbon and silicon deposited in porous carbon channels; the porous carbon comprises mesopores and macropores, the pore diameter of the mesopores is greater than 10nm and less than or equal to 50nm, and the pore diameter of the macropores is greater than 50nm and less than or equal to 100nm; based on the total volume of the pores in the porous carbon, the volume fraction of the mesopores is 50%-75%, and the volume fraction of the macropores is 10%-20%; and the silicon deposited in the mesopores and the macropores is a hollow silicon nanotube. Silicon in the silicon-carbon material mainly exists in the form of hollow silicon nanotubes, and during lithium intercalation expansion, since expansion spaces are reserved in the hollow nanotubes, the lithium intercalation expansion of the whole silicon-carbon material is reduced.

The invention provides a sulfur recovery method and system suitable for a crushed coal pressure gasification technology, the system comprises an acid gas pretreatment unit, a sulfur recovery unit and a desulfurization unit, the acid gas pretreatment unit comprises a washing tower, an absorption tower and a regeneration tower which are arranged in sequence, the method comprises the following steps of: washing low-temperature methanol washing acid gas in a washing tower to remove quantitative ammonia gas and methanol, performing countercurrent contact absorption on the low-temperature methanol washing acid gas and amine liquid to separate heavy hydrocarbon and take away a part of # imgabs 0 #, absorbing # imgabs 1 # and the other part of # imgabs 2 # in the acid gas by the amine liquid, feeding into a regeneration tower to separate out pretreated acid gas containing # imgabs 3 # and concentrated # imgabs 4 #, and feeding into a sulfur recovery unit to recover liquid sulfur, and the generated tail gas is sent into a desulfurization unit to be treated and then discharged. Therefore, the low-temperature methanol washing acid gas with complex components is treated, and the long-period stable operation of the sulfur recovery process is ensured.

This invention belongs to the field of catalyst technology, specifically relating to a selective reduction catalyst for the production of sulfur from sulfur dioxide and its application method. The selective reduction catalyst for sulfur production from sulfur dioxide contains 1-2 wt% cobalt (CoO), 4-10 wt% molybdenum (MoO3), and 2-4 wt% zinc (ZnO), with TiO2-Al2O3 as the support. This invention exhibits good wide-temperature reaction performance, heat resistance, and water vapor resistance; the single-pass yield of elemental sulfur is higher than 80%, and the reaction process has high efficiency, showing promising application prospects.

The invention belongs to the technical field of sulfur recovery, and particularly relates to a treatment method and a treatment device for ultralow-concentration acid gas, which are applicable to treatment of acid gas with H2S less than 1% in industries such as coal chemical industry and the like. According to the treatment method of the ultralow-concentration acid gas, the ultralow-concentration acid gas and the Claus hydrogenation tail gas are mixed and then introduced into the quench tower to be treated, on one hand, the temperature of the hydrogenation tail gas can be reduced, on the other hand, the effect of injecting ammonia into quench water can be achieved, sulfur resources are fully recycled, and meanwhile the energy consumption is reduced. And dual treatment of H2S and NH3 in the ultralow-concentration acid gas is realized.

The utility model provides a sulfur recovery system coupled with a heat storage device, which comprises a heat storage device, a reaction furnace, a sulfur recovery device and an incinerator, the sulfur recovery device comprises a reheater, a converter and a sulfur cooler, and the heat storage device comprises a high-temperature storage tank, a steam generator, a low-temperature storage tank and a heating device which are sequentially communicated end to end. A modified liquid sulfur material capable of being circularly conveyed is arranged in the heat storage device, the high-temperature storage tank is communicated with a reheater, the reheater is communicated with a steam generator and / or a low-temperature storage tank, the steam generator is connected with the low-temperature storage tank, the low-temperature storage tank is communicated with a sulfur cooler, the sulfur cooler is communicated with a waste heat boiler of a reaction furnace, and the waste heat boiler is connected with a heating device. The heating device is connected with the high-temperature storage tank; according to the device disclosed by the utility model, various different grades of energy in the sulfur recovery system can be gathered and complementarily coupled, process gas can be heated in the reheater, and medium-high pressure steam can be produced in a centralized manner.

The invention belongs to the technical field of preparation of sulfur, and particularly relates to a process for producing sulfur from sulfur dioxide. The SO2 introduced by the sulfur dioxide gas flow is selectively reduced into elemental sulfur by using hydrogen introduced by the hydrogen flow under the temperature condition of 160-320 DEG C through one or more reaction devices; each reaction device is provided with one or more selective reduction reactors which are connected in series, one or more catalyst bed layers are arranged in each selective reduction reactor, and each catalyst bed layer is filled with a selective reduction catalyst. The method is simple in process reaction, short in flow and high in efficiency, products except sulfur are water or basically water, and the method has a certain application prospect.

The invention discloses an emission treatment system for sulfur products, and relates to the technical field of sulfur tail gas treatment, a dry cleaning treatment cavity, a thermal reaction cavity, an interception heat exchange cavity and a washing interception cavity are formed in the inner side of an integration separation tower, and the dry cleaning treatment cavity, the thermal reaction cavity, the interception heat exchange cavity and the washing interception cavity are formed in the middle of the inner side of the integration separation tower; the device effectively solves the problem that in the prior art, when tail gas is treated, a large number of alkaline raw materials and energy need to be consumed for absorption reaction treatment, sulfide can be independently recycled, and tail gas concentration is achieved in cooperation with gas internal circulation treatment; the size of equipment can be effectively reduced, multi-section catalysis is synchronously carried out, multi-section reaction absorption is synchronously carried out, the overall treatment efficiency is improved, the tail gas purification efficiency and effect are effectively improved, and the cleanliness of exhausted tail gas is guaranteed.

The utility model provides a hydrogenation reaction system for producing sulfur by reducing acid gas regenerated by activated carbon, which comprises an acid gas pretreatment system, a first-stage hydrogenation system, a second-stage hydrogenation system, a tail gas treatment system and a liquid sulfur tank, the acid gas generated by regeneration of desulfurized activated carbon is pretreated and then is subjected to hydrogenation reduction to produce sulfur, the hydrogenation is divided into two stages, wherein the primary hydrogenation is divided into a plurality of sections according to different SO2 contents, a sectional hydrogenation method is adopted, gas subjected to the primary hydrogenation enters the secondary hydrogenation, air is introduced into the gas subjected to the secondary hydrogenation, and after side reaction products generated by hydrogenation are oxidized into sulfur and SO2, residual tail gas is sent back to an inlet of the activated carbon desulfurization device. Through first-stage hydrogenation and second-stage hydrogenation, the temperature rise of the hydrogenation reaction is reduced, side reactions are reduced, and the SO2 conversion rate is improved; oxidation-method tail gas treatment is adopted to directly return to activated carbon for desulfurization, and no waste gas is discharged on the whole.

The invention belongs to the field of lithium ion battery raw materials, and particularly relates to a niobium-based composite material and a preparation method and application thereof. The composite negative electrode material is composed of a niobium-based framework material, a high-capacity material and a coating material. The niobium-based composite negative electrode material takes a porous niobium-based material as a framework, so that the characteristics of high stability, high safety and rapid charging and discharging of the niobium-based negative electrode material are kept; the high-capacity material is embedded in a niobium-based skeleton pore structure, so that the gram volume of the niobium-based material is improved, and meanwhile, the problem of rapid capacity attenuation caused by high volume expansion of the high-capacity material is solved; the coating material coats the surfaces of the niobium-based framework and the high-capacity material, and the high-capacity material is sealed in holes of the niobium-based framework material, so that on one hand, the conductivity of the niobium-based material can be improved, on the other hand, precipitation of the high-capacity material is inhibited, and the cycling stability of the composite negative electrode material is further improved. And the prepared niobium-based composite negative electrode material is simple in preparation process flow and has good adaptability to the preparation process of the existing lithium ion battery.

The invention belongs to the technical field of catalysts, and particularly relates to a selective reduction catalyst for preparing sulfur from sulfur dioxide and an application method of the selective reduction catalyst. The selective reduction catalyst for preparing sulfur from sulfur dioxide contains 1-2wt% of cobalt (in terms of CoO), 4-10wt% of molybdenum (in terms of MoO3) and 2-4wt% of zinc (in terms of ZnO), and a carrier is TiO2-Al2O3. The method has good wide-temperature reaction performance, heat resistance and water vapor resistance, the single-pass yield of elemental sulfur is higher than 80%, the efficiency of the reaction process is high, and the method has good application prospects.

The invention discloses a method for removing thiocyanate radicals in cyanide-containing wastewater, and belongs to the technical field of metal refining. The method comprises the following steps: adding concentrated sulfuric acid to adjust the pH value of cyanogen-containing wastewater to 2-3, carrying out a stirring reaction, filtering, adding sodium hydrosulfite into a filtrate, simultaneously adding concentrated sulfuric acid to maintain the pH value to 3-5, carrying out a stirring reaction, firstly introducing a sodium sulfite acidic solution into overflowed H2S and HCN gas to absorb H2S gas, and then introducing a sodium hydroxide strong alkaline solution to absorb HCN gas. Aiming at cyanide-containing wastewater subjected to acidification treatment, firstly, a strong reducing agent sodium hydrosulfite is added to reduce SCN <-> into H2S and HCN with recycling value, then H2S is absorbed, elemental sulfur is recovered, finally HCN is absorbed, CN <-> is recovered, and the method is used for cyaniding gold extraction of a gold leaching system. The absorption and separation of H2S and HCN gas are realized, the recovery of elemental sulfur and CN <-> is further realized, and other ions are not introduced into a water supply system.

The invention provides a process system for recovering elemental sulfur and co-producing methanol from sulfur-containing tail gas, the process system comprises an elemental sulfur recovery system and a methanol synthesis system, the elemental sulfur recovery system comprises a membrane separation unit, a hydrogen sulfide thermal decomposition furnace, a sulfur production waste heat boiler, a waste heat boiler, a tail gas liquid separation tank, a tail gas waste heat unit, a hydrogenation reactor, an MDEA absorption tower and an MDEA hydrogen sulfide regeneration tower; the methanol synthesis system comprises a methanol reaction tower, a high-pressure separator, a low-pressure separator, a rectifying tower and a PSA adsorption tower II. According to the process system disclosed by the invention, energy conservation and consumption reduction are realized to the greatest extent, the process system is particularly more effective in matching use with a methanol production project, up-to-standard emission of sulfur-containing tail gas can be realized, and effective hydrogen and effective carbon in the tail gas can be reasonably recovered.

The embodiment of the utility model provides zero-emission methanol preparation equipment based on garbage gasification and water electrolysis. The equipment comprises a water electrolysis hydrogen production unit, a garbage gasification unit, a first methanol synthesis unit, a second methanol synthesis unit and a gas separation unit, the water electrolysis hydrogen production unit is respectively connected with the garbage gasification unit, the first methanol synthesis unit and the second methanol synthesis unit; the gas separation unit is respectively connected with the garbage gasification unit, the first methanol synthesis unit and the second methanol synthesis unit; the water electrolysis hydrogen production unit generates hydrogen and oxygen through electrolysis; the garbage gasification unit is used for carrying out gasification reaction by using oxygen provided by the water electrolysis hydrogen production unit to prepare synthesis gas containing carbon monoxide, carbon dioxide and hydrogen; the gas separation unit is used for separating carbon monoxide, carbon dioxide and hydrogen in the synthesis gas introduced from the garbage gasification unit, the carbon monoxide and the hydrogen are introduced into the first methanol synthesis unit, and the carbon dioxide is introduced into the second methanol synthesis unit for preparing methanol respectively.

The invention relates to the technical field of sulfur recovery, in particular to sulfur recovery equipment and a recovery method thereof.The sulfur recovery equipment comprises a recovery box, a reaction box is arranged on the recovery box, an air outlet is formed in the reaction box, an air inlet pipe is arranged on the side wall of the reaction box, lifting mechanisms are arranged in the recovery box and the reaction box, and a spraying mechanism is arranged on the reaction box; and a centrifugal mechanism is arranged in the recycling box. According to the device, the lifting mechanism and the cleaning mechanism are matched, so that the atomizing nozzle can be rotationally cleaned during up-and-down movement, particles are effectively prevented from being blocked at the atomizing nozzle, a desulfurizing agent can be uniformly and smoothly sprayed, and the sulfur recovery efficiency and quality are improved; by arranging the centrifugal mechanism, under the action of centrifugal force, liquid is discharged through the drainage pipe, solid is discharged through the drainage groove, effective separation of the solid and the liquid is achieved, the treatment efficiency and quality are improved through the solid-liquid separation mode, the solid and the liquid can be conveniently and intensively treated in a distinguished mode, and further recycling of resources is facilitated.

Methods for the in-situ production of one or more chemical products in a subterranean well include the steps of admitting natural gas into the well from the surrounding subterranean formation, directing the natural gas into a downhole reactor in the well, reacting the natural gas within the downhole reactor to produce an intermediate product stream that includes the one or more chemical products, and withdrawing the intermediate product stream and the one or more chemical products from the downhole reactor. The methods can be earned out in a downhole reactor (22) that includes a reaction chamber (26) inside tubing (20) and an inlet valve (24) adapted to control the introduction of natural gas into the reaction chamber (26).

The invention provides an upgrading and purifying method for waste tire pyrolysis carbon black, and belongs to the technical field of upgrading, purifying and high-value utilization of waste tires and waste rubber pyrolysis carbon black. The upgrading and purifying method comprises the following steps: carrying out wet magnetic separation on waste tire pyrolysis carbon black to obtain pyrolysis carbon black subjected to magnetic separation; mixing the cracked carbon black subjected to magnetic separation with hydrobromic acid for acid leaching to obtain first acid leaching filtrate and a first carbon black product; adding zinc particles into the first acid leaching filtrate to obtain second filtrate; evaporating and crystallizing the zinc bromide solution to obtain zinc bromide; zinc bromide is prepared into heavy liquid, the first carbon black product is subjected to reselection, and a pure carbon black product and silicon dioxide tailings are obtained; introducing hydrogen sulfide gas into the ferric ion solution for purification and absorption to obtain sulfur and a third filtrate; and the third filtrate is subjected to electrolytic regeneration, and a regenerated ferric ion solution and hydrogen are obtained after electrolytic regeneration is finished. According to the method, the acid leaching byproduct zinc bromide is used as a reselection medium, and resource recycling is achieved while efficient separation and impurity removal are achieved.

The invention relates to the technical field of organic solid waste treatment, in particular to a process system for hydrogen production and co-production of biological natural gas from biological crude synthesis gas, which comprises a purification unit, a hydrocarbon regulation unit, an acid removal unit, a methane upgrading unit, a hydrogen recycling and purifying unit and a methane recycling and purifying unit which are connected in sequence. The purification unit is used for removing impurities through pre-impurity removal, compression, dry-process impurity removal and wet-process desulfurization to produce purified synthesis gas and sulfur; the hydrocarbon adjusting unit is pressurized through a centrifugal compressor and adjusts the hydrogen-carbon ratio; the acid removal unit is used for removing acid gas and organic sulfur; the methane upgrading unit is used for converting CO / CO2 into methane through methanation reaction; and the recycling unit purifies hydrogen through pressure swing adsorption and recycles methane by using a membrane separation technology to produce biogas. The problems of low purity and insufficient raw material utilization rate of the traditional process are solved through the circulation process, the co-production of high-purity hydrogen and biogas is realized, and the additional value of resources is improved.

The invention relates to the field of sewage treatment, and discloses a sewage treatment method based on desulfurization and denitrification, which comprises the following steps: S1, magnetic flocculation-electro-catalysis pretreatment: adding a polyaluminum chloride-magnetic powder composite flocculant into sewage through a magnetic flocculation reactor to form a magnetic floc, removing suspended matters through a permanent magnetic separation device, and then entering an electro-catalysis oxidation pond, carrying out electrolysis by taking titanium-based lead dioxide as an anode and active carbon fiber as a cathode; and S2, performing synchronous desulfurization and denitrification on the three-dimensional electrode fluidized bed, feeding pretreated effluent into a three-dimensional electrode fluidized bed reactor, filling activated carbon particles as a third electrode, and adding a composite flora of thiobacillus and denitrifying bacteria. The efficient removal of sulfides, total nitrogen, total phosphorus and chemical oxygen demand in the sewage is realized through a multi-stage synergistic process of magnetic flocculation-electrocatalysis pretreatment, synchronous desulfurization and denitrification of a three-dimensional electrode fluidized bed, deep denitrification and dephosphorization of a denitrification filter tank and catalytic ozonation-membrane separation combined deep treatment.

The utility model discloses a crude sulfur treatment system which comprises a hot filter, a liquid inlet pipe, a blow-off pipe, a purging pipe, a steam pipe and a condensate water discharge bypass pipe, one end of the liquid inlet pipe is connected with the hot filter, the other end of the liquid inlet pipe is connected with a slurry pump placed in a crude molten pool, and a liquid inlet heat preservation valve is installed on the liquid inlet pipe; one end of the blow-off pipe is connected with the hot filter, the other end of the blow-off pipe extends into the rough molten pool, and the blow-off pipe is provided with a blow-off heat preservation valve; one end of the purging pipe is connected with the liquid inlet pipe and located between the hot filter and the liquid inlet heat preservation valve, and the other end of the purging pipe is provided with a purging heat preservation valve. One end of the steam pipe is connected with the purging heat-preservation valve, and the other end of the steam pipe is connected with a steam source; one end of the condensate water discharge bypass pipe is installed on the steam pipe, and a condensate water discharge valve is installed on the condensate water discharge bypass pipe. The device can improve the yield of sulfur and reduce the sulfur content of hot filter residues.

The invention belongs to the technical field of sulfur recovery, and particularly relates to an organic sulfur hydrolysis synergistic sulfur recovery catalyst as well as a preparation method and application thereof. Comprising the following steps: (1) dissolving strontium salt; (2) adding transition metal salt; (3) adding a titanium source; (4) adding an alkali metal compound; (5) stirring reaction; (6) hydro-thermal treatment; and (7) centrifuging, washing, drying and roasting. The general formula of the prepared catalyst is SrTi (1-x) MxO3, in the formula, x is equal to 0.05-0.2, and M is a transition metal element. The prepared catalyst is high in material composition and structure adjustability, rich in surface acid-base sites, excellent in organic sulfur hydrolysis reaction activity and H2S selective oxidation activity, and capable of realizing efficient and synergistic proceeding of organic sulfur hydrolysis and H2S selective oxidation and removing sulfur-containing components in process gas in one step.

An embodiment described herein provides a method of treating a gas stream, where the method includes: flowing the gas stream containing H2S and CO2 into a plasma reactor; igniting a plasma in the plasma reactor containing the gas stream; decomposing the H2S to generate H2 and elemental sulfur in the plasma generating a product gas stream; condensing the elemental sulfur from the product gas stream as a liquid; and separating the H2 from the product gas stream.

The application discloses a kind of functionalized nano sulfur preparation and its application in wound repair.The application uses PEG200 and elemental sulfur as reaction raw materials, does not introduce other organic solvents, is prepared by muffle furnace gradient heating mode at 30-70 DEG C safe reaction temperature, and obtains the spherical nano sulfur of 50-100nm particle size, has certain repair effect to normal mouse wound and diabetic refractory wound, and does not cause toxicity in vivo, with higher biological safety.Therefore, it can be used for wound repair, especially refractory wound repair.

The present invention relates to a resource recovery method for sulfide all-solid-state batteries, which belongs to the field of solid-state battery technology. The main process is: retired sulfide all-solid-state battery cells undergo sulfur-heat reaction to obtain pyrolysis slag and current collectors, the pyrolysis slag undergoes water immersion treatment, and is separated to obtain water leaching liquid and water leaching slag, the water leaching liquid is concentrated and lithium precipitation is treated to separate lithium carbonate and alkali metal hydroxide solution, the water leaching slag undergoes acid leaching treatment to separate acid leaching slag and acid leaching liquid, the acid leaching liquid undergoes phosphorus precipitation treatment to separate hydroxyphosphate and phosphorus removal liquid, the phosphorus removal liquid undergoes nickel-cobalt-manganese precipitation treatment to separate nickel-cobalt-manganese coprecipitate and neutral alkali metal halide solution, the acid leaching slag undergoes dissolution treatment to separate graphite and sulfur, and the non-polar organic solvent is recycled. This method can effectively achieve high-value-added recovery of energy metals in retired sulfide all-solid-state batteries, synergistically achieve the recovery of graphite and sulfur, with low energy consumption and emissions and high raw material utilization.

The utility model relates to a system for synergistically removing sulfides and carbon dioxide in blast furnace gas, which comprises a spray tower, a hydrolysis tower, an absorption tower and a water scrubber which are connected in sequence, and a first spray device for spraying alkali liquor to remove chloride ions in the gas is arranged in the spray tower; a hydrolysis catalyst for catalyzing organic sulfur in the coal gas to be hydrolyzed into H2S is arranged in the hydrolysis tower; a second spraying device for spraying an absorbent to absorb H2S and CO2 in the coal gas is arranged in the absorption tower; a third spraying device for spraying water is arranged in the water washing tower; the regeneration and separation device is used for regenerating, separating and recycling the absorbent, H2S and CO2, and is connected with the absorption tower. According to the utility model, organic sulfur is completely converted into H2S by utilizing the hydrolysis tower, CO2 and H2S are simultaneously absorbed by utilizing the absorption tower, and an absorbent barren solution, CO2 gas and elemental sulfur can be separated and recovered, so that the working procedures are effectively saved.

The invention discloses a waste sulfuric acid treatment method, and relates to the technical field of environmental engineering, the waste sulfuric acid treatment method comprises: a pretreatment module configured with a multi-stage filtering device and a pH adjusting tank and used for removing suspended solids in waste acid and adjusting the acid concentration; a vanadium-titanium-cerium composite catalyst is arranged in the catalytic cracking reactor, sulfuric acid is decomposed at a set temperature under microwave-assisted heating to generate SO2 gas, and meanwhile heat energy is supplied to the pretreatment unit through a waste heat recovery device; the electrochemical separation module comprises a bipolar membrane electrodialyzer and a pulse electrode array and is used for separating and recovering metal ions Fe < 3 + > and Cu < 2 + > from the cracking raffinate and regenerating sulfuric acid with a set concentration; and the intelligent control center integrates an AI algorithm and an Internet of Things sensor, and dynamically optimizes the cracking temperature, the membrane voltage and the material flow. According to the invention, intelligent sorting, directional conversion and closed-loop recovery are taken as the core, and the problems of high energy consumption, difficulty in differential treatment and heavy pollution in waste sulfuric acid treatment are solved.

The invention relates to a sodium-sulfur battery technology, and aims to provide a preparation method and application of a modified carbon-supported sulfur electrode material and a self-supporting sulfur electrode. The preparation method comprises the following steps: carrying out spray drying on a mixed solution containing aniline hydrochloric acid, ammonium persulfate hydrochloric acid and nano calcium carbonate to obtain a precursor, and carrying out carbonization and acid leaching to obtain a hydrophilic carbon carrier with primary and secondary pore channels; a positive plate is prepared to assemble a soft package battery, and potassium intercalation is realized through multiple times of potassium deintercalation and intercalation cycle treatment; disassembling and cleaning to obtain a potassium-embedded carbon carrier, reacting with transition metal nitrate, and forming monatomic transition metal clusters between graphite layers to enlarge the graphite spacing; removing potassium nitrate to obtain a modified carbon carrier which is provided with three-stage mass transfer channels and in which transition metal is loaded, then grinding and mixing the modified carbon carrier with elemental sulfur, performing heating treatment, and cooling to obtain the modified carbon sulfur-loaded electrode material. According to the invention, transition metal single atomic clusters are formed on the walls of the micropores while the interlamellar spacing of the graphite is enlarged to form the micropores, so that the cycling stability of the sodium-sulfur battery is effectively improved.

A method of treating an aqueous solution, where the method includes separating H2S from the aqueous solution, generating a gas stream including the H2S, flowing the gas stream into a plasma reactor, igniting a plasma in the plasma reactor including the gas stream, decomposing the H2S to generate H2 and elemental sulfur in the plasma generating a product gas stream including the H2, and condensing the elemental sulfur from the product gas stream as a liquid.

The invention discloses a device and a method for desulfurizing sulfide-containing wastewater and recovering sulfur, the device and the method utilize efficient reaction of iron oxyhydroxide and sulfide, excessive iron oxyhydroxide reacts to generate ferrous oxide and sulfur, and a small part of ferrous sulfide exists; the surfaces of ferrous sulfide and sulfur in a reaction product are provided with negative charges, and the surface of the residual unreacted iron oxyhydroxide is provided with positive charges, so that floc is formed through the electric neutralization flocculation action of several compounds and can be quickly precipitated; after precipitation, overlying water is treated desulfurized water, ferrous sulfide and ferrous oxide generated in the precipitate are aerated and oxidized in an iron regeneration device, iron oxyhydroxide can be regenerated, and residual sulfide in the ferrous sulfide is converted into elemental sulfur; and the generated iron oxyhydroxide can be used for treating the sulfide-containing water again, so that the sulfide-containing water is treated through reciprocating circulation, and the elemental sulfur and the iron oxyhydroxide are mixed together for continuous accumulation.

The invention discloses a preparation method of a catalyst for catalytic reduction of SO2 by CO in an oxygen-containing atmosphere, and belongs to the technical field of atmospheric pollution purification. According to the catalyst, base metals such as Fe and Cu are adopted to modify supported metal sulfide, active components of the supported metal sulfide comprise FeS, CoS2, CuS and the like, and common metal oxides such as cerium oxide, titanium oxide, aluminum oxide and the like are selected as carriers. The catalyst not only has strong SO2 catalytic reduction performance and high stability in an oxygen-containing atmosphere, but also is simple in preparation process, wide in raw material source and low in cost, has remarkable economical efficiency and environmental protection benefits, has a wide application prospect in the field of air pollution purification, and has important significance in reducing SO2 emission and improving air quality. The embodiment shows that when the oxygen volume content of the Fe elementary substance modified supported metal sulfide composite catalyst is 5%, the SO2 conversion rate is 97.9%, and the sulfur yield is 90.6%.