Study on Characteristics of Synthesis Gas Generation During Catalytic Gasification of Municipal Solid Waste

This paper focuses on the effect of Ni-based reforming catalyst on tar decomposition, dealing with the relationship between the operating factors with synthesis gas composition. A series of catalytic gasification experiments of municipal solid waste were carried out under the range of 873-1023K, to evaluate the performance of three types Ni-catalyst on promoting H2 and CO generation, particularly concerning with H2/CO ratio variation. Tar generation characteristics relating to operating elements were discussed, and catalytic promoter inhibiting H2S, SO2 occurs was investigated. It indicated that Ni catalyst can effectively improve tar decomposition, promotes H2 and CO generation. High temperature is favour for gasification and deep thermal crack, moreover improve the catalytic performance. Tar is finally converted into unsaturated hydrocarbons and oxy-organics. As catalyst promoter, alkaline metals, such as K, Ca, Zn presenting in Ni catalyst will significantly eliminate H2S, promote tar decomposition, furthermore, directly affect the H2 and CO ratio. Alkaline metal additives contained Ni-based catalysts be suggested as a potential means for the efficient production of clean synthesis gas from municipal solid wastes.