Effect of Preparation Methods on the Performance of Iron-based Catalysts in Hydrogen Sulfide Methane Reforming
Hydrogen sulfide methane reforming technology is a new technology for hydrogen sulfide utilization.It can not only effectively reduce the harm of hydrogen sulfide,but also recover valuable hydrogen,carbon and sulfur resources.However,the catalysts used in this technology have the problems of complex preparation process and poor stability.Al2O3 was used as the carrier to load the active component iron oxide by in-situ method,coprecipitation method and impregnation method,and the catalysts were characterized by BET,XRD and TPR.Under the reaction conditions of atmospheric pressure,reaction temperature of 800℃,molar ratio of H2S to CH4 of 1/5,and volume space velocity of 20 000 h-1,the effect of preparation method and loading amount on the catalyst activity was investigated.The results showed that the catalysts prepared by the three methods showed good stability within 140 min reaction.The catalysts prepared by the coprecipitation method and the impregnation method had the characteristics of large specific surface area,high crystallinity and easier reduction of oxygen species,and showed high H2S conversion in the reforming reaction.
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