摘要:
A flue-gas purification system includes a flue-gas cycling system, a reactor, and an absorbent adding system having at least a catalytic absorbent, wherein the catalytic absorbent is being gasified for reacting with the flue-gas in the reactor in a homogenous gas-gas phase reacting manner. Therefore, the purification system has fast reaction rate between the pollutants of the flue-gas and the catalytic absorbent, which is preferably ammonia, to efficiently remove pollutants, so as to effectively purify the flue-gas.
摘要:
The method for regenerating a carbonyl sulfide (COS) hydrolysis catalyst according to the present invention is a method for regenerating a Ba/TiO2 based carbonyl sulfide (COS) hydrolysis catalyst by hydrolyzing COS which is contained in a gas obtained by gasifying a carbon raw material, wherein a spent COS hydrolysis catalyst is washed with water, dried, immersed in an aqueous solution of a barium salt for a prescribed amount of time, dried, and calcined so as to re-support the active component on the surface of the COS hydrolysis catalyst, thus enabling the regeneration of the COS hydrolysis catalyst.
摘要:
A deodorizing material is a cured substance that is obtained by dissolving a photosensitizing colorant in an unsaturated polyester resin composition which contains unsaturated polyester and a monomer copolymerizable with the unsaturated polyester and which is in a liquid state at a room temperature, and by adding a curing agent to let the liquid cured. This deodorizing material changes from the base state to the singlet excitation state, and further to the triplet excitation state upon irradiation with light in a gas phase containing oxygen and odor components. This energy is given to the oxygen molecules to produce singlet oxygen. The oxidation action of the produced singlet oxygen decomposes the odor components.
摘要:
The method deacidifies a gas including H2S and CO2. The gas is subjected to an absorption to collect the CO2 and the H2S in an absorber, then to conversion through hydrolysis of the COS to H2S and CO2 in a reactor, and to a second absorption to collect the H2S and the CO2 formed in the reactor. The absorbent solution is regenerated in regenerator. The regenerated absorbent solution is separated into two which are: a main stream supplying the absorber, and a remaining stream supplying the second absorption
摘要:
The invention relates to a process for finally removing sulphur-containing, nitrogen-containing and halogen-containing impurities contained in a synthesis gas, said process including: a) a joint step for hydrolysing COS and HCN contained in the gas and for collecting the halogen-containing compounds, using a TiO2-based catalyst, b) a washing step using a solvent, c) a step for desulphurisation on a collecting or adsorbing mass. The synthesis gas purified in accordance with the process of the invention contains less than 10 ppb by weight, less than 10 ppb by weight of nitrogen-containing impurities and less than 10 ppb by weight of halogen-containing impurities.
摘要:
The invention provides a method for disposal of di-sulphide compounds having the general formula of R—S—S—R, wherein R is an alkyl group, the method comprising the steps of: (a) combusting said di-sulphide compounds in the presence of an oxygen-containing gas in a sulphur dioxide generation zone, whereby at least part of the di-sulphide compounds is converted to sulphur dioxide to obtain a gas stream comprising sulphur dioxide; (b) reacting the gas stream comprising sulphur dioxide with hydrogen sulphide to obtain elemental sulphur.
摘要:
A process for the reduction of carbonyl sulfide (COS) in a gas stream is described. It comprises contacting the gas stream with an iron oxide-based material. The present invention relates to the removal of COS from any type of gas stream, in particular those which include one or more of the group comprising ethane, methane, hydrogen, carbon dioxide, hydrogen cyanide, ammonia, hydrogen sulfide, and noble gases. These include natural gas, and in particular syngas. Syngas is useable in a Fischer-Tropsch process. The present invention provides a simple but effective process for the reduction of COS, especially with a material that can easily be located in existing guard beds—avoiding any re-engineering time and costs. The iron oxide-based materials can also be useable against other impurities, providing a single bed solution.
摘要:
The invention provides a process for the removal of COS from a first synthesis gas stream comprising COS and H2S, the process having the steps of: (a) converting COS in the first synthesis gas stream to H2S by contacting the first synthesis gas stream with a COS-hydrolysing catalyst in the presence of water in a hydrolysis zone to obtain a second synthesis gas stream depleted of COS and enriched in H2S; (b) removing H2S from the second synthesis gas stream by contacting the second synthesis gas stream with a solid adsorbent in a H2S removal zone to obtain a third synthesis gas stream depleted of H2S and depleted of COS
摘要:
Carbon monoxide and carbonyl sulfide emissions are reduced in manufacturing processes, including titanium tetrachloride production processes. Gas is contacted with CO, COS, and an oxygen-containing gas with a suitable catalyst. The catalyst may be a metal oxide catalyst containing bismuth, cobalt and nickel, a xerogel or aerogel catalyst containing Au, Rh, Ru and Co in aluminum oxide/oxyhydroxide matrices, or a supported metal catalyst that contains at least one metal from the group Pd, Rh, Ru and Cu. In the latter case, the catalyst support is contains alumina or carbon. A catalyst composite of Au, Rh, Ru and Cr, and cerium oxide and lanthanum oxide may also be used.
摘要:
Catalysts for removing sulfur compounds almost completely from industrial gases are made by impregnating a suitable support with an oxide of at least one element selected from Group VIB of the Periodic System of Elements and at least two other oxides of elements selected from Groups IB, IIB, VIB and VIIIB of the Periodic System of Elements. Industrial gases in which sulfur compounds are present are brought into contact with these catalysts under conditions such that the sulfur compounds are converted to elemental sulfur and thus removed from the industrial gas.