Researches On Process Of Removing Hydrogen Sulfide From Sour Gas By Direct Catalytic Oxidization

With the development of economy and the increasing awareness of environmental protection,researches on process of removing hydrogen sulfide form sour gas gained more attention than before.The existence of hydrogen sulfide in sour gas will not only lead to catalyst poisoning,corrosion of the pipes and metal equipment,affected the subsequent product quality,but also polluted environment if discharged the gases directly.Therefore,many researchers have been paying more attention to the desulfurization technology.Currently,the most widely used method is wet oxidation desulfurization,but some problems of this method are still existed.Based on the present desulfurization,original wet oxidation method has been improved and developed an new desulfurization solution,related optimum conditions,desulfurization solution and solid product were explored.This paper details three parts as follows:The first part:simulative experiment was conducted with desulfur technology of wet oxidation method,using formulated gas(H2S 15 vol%,N2 85 vol.%)(logogram:gas-1)as gas source,triethanolamine(TEA)as alkali source,binuclear cobalt phthalocyanine six ammonium sulfonate sulfone(logogram:CoPc1)as catalyst,oxygen in the air as the oxidant under the water by homemade desulfurization and regeneration integrated experimental device.The influence of different conditions,such as reaction temperature,the volume of TEA and the content of catalyst,on the effect of desulfurization efficiency were investigated.Desulfurization waste liquids and the solid product were tested.Experimental results show:in 40 mL water,when flow rate of source gas and air was 16 mL/min and 88 L/h respectively,the concentration of catalyst is 75 mg/L and the volume of TEA is 0.6 mL,under the temperature 50 ? reacting 2h,the desulphurization efficiency can reach 95%.The smaller particle of solid products is sulfur by determined by melting point determination and average recovery rate of sulfur can reach 10.63%.Desulfurization solution have sulfate and thiosulfate by qualitative analysis;21%of hydrogen sulfide is converted into sulfate and 68.37%hydrogen sulfide is converted into thiosulfate by quantitative analysis?The second part:simulative experiment was conducted with desulfur technology of wet oxidation method,using triethylene glycol dimethyl ether as solvent,gas-1 as gas source,TEA as alkali source,2(3),9(10),16(17),23(24)-4-(5-methyl-4,isopropylphenoxy)cobalt phthalocyanine(logogram:CoPc2)as catalyst,oxygen in the air as the oxidant by homemade desulfurization and regeneration integrated experimental device.The influence of different conditions,such as reaction temperature,the content of catalyst and the volume of TEA,on the effect of desulfurization efficiency were investigated.Desulfurization waste liquids and the solid product were tested.Experimental results show:in 300 mL solvent,when flow rate of source gas and air was 40 mL/min and 160 L/h respectively,the concentration of catalyst is 40 mg/L and the volume of TEA is 10 mL,under the temperature 20 ? reacting 2 h,the desulphurization efficiency was 90%.The larger particle of solid products is sulfur by determined by melting point determination and average recovery rate of sulfur can reach 97%.Desulfurization solution have no inorganic salt by qualitative analysis.In short,the original wet oxidation desulfurization process was improved and a new method was proposed of this thesis,and the optimum process conditions were explored.In industrial applications,this improvement may reduce the desulfurization costs and create higher economic returns.It may has some real meaning and guiding significance.