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以连续流动进气系统和Pyrex玻璃管反应器,在450～600℃的温度下,研究了H_2S催化热解为H_2和S的反应。采用浸渍法和干混法制备了V_2O_5/Al_2O_3、MoO_3/Al_2O_3、V_2O_5/TiO_2、V_2O_5/SiO_2以及Cu/Al_2O_3等一系列催化剂,研究了各种催化剂在反应中的产氢率随反应时间,反应温度及H_2S流速变化的规律。用冰水冷阱回收硫磺,并用二乙醇胺溶液吸收尾气中未反应的H_2S,可以得到高纯度的氢气。结果表明,浸渍法制备的催化剂亦可用于H_2S催化热解为H_2和S的反应。最佳催化剂的组成为:20%V_2O_5+12%MoO_3/Al_2O_3,在600℃下所得产氢率为4.05%。
The reaction of H 2 S catalyzed pyrolysis to H 2 and S was studied at 450-600 ℃ with a continuous flow of gas inlet system and Pyrex glass tube reactor. A series of catalysts such as V 2 O 5 / Al 2 O 3, MoO 3 / Al 2 O 3, V 2 O 5 / TiO 2, V 2 O 5 / SiO 2 and Cu / Al 2 O 3 were prepared by impregnation method and dry blending method. The effects of reaction time, Temperature and H_2S flow rate changes. Recovery of sulfur with ice-water traps and absorption of unreacted H 2 S in the tail gas with diethanolamine solution gives high purity hydrogen. The results show that the catalyst prepared by the impregnation method can also be used for H 2 S catalytic pyrolysis of H 2 and S reaction. The optimum composition of catalyst is: 20% V 2 O 5 + 12% MoO 3 / Al 2 O 3, and the hydrogen yield obtained at 600 ℃ is 4.05%.