文献类型：期刊文献

英文题名：The activity of the lignite hydro-gasificaiton with potassium catalyst for production of methane

作者：Wang, Xingjun[1]; Hong, Bingqing[1]; Liu, Haifeng[1]; Yu, Guangsuo[1]; Wang, Fuchen[1]

机构：[1] Institute of Clean Coal Technology, Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, China

年份：2012

卷号：2

起止页码：1617

外文期刊名：29th Annual International Pittsburgh Coal Conference 2012, PCC 2012

收录：EI(收录号：20132016336311)

语种：英文

外文关键词：Catalyst activity - Temperature - Catalyst selectivity - Gasification - Hydrogen - Gas adsorption - Lignite - Scanning electron microscopy - Carbon - Potassium

摘要：The activity, selectivity and gas release of the lignite hydro-gasification was studied in a pressurized fixed bed bench reactor. Under the condition of 4.0MPa, 800°C, the effects of temperature, pressure and potassium catalyst loadings on reactivity of hydro-gasification of lignite were investigated. The amounts of methane gases produced were significant for catalytic hydro-gasification, compared to those released in the non-catalytic hydro-gasification. In the case of non-catalytic gasification, the contents of CH4 were in the range of 80-95%. However, in the case of catalytic gasification, the contents of CH4 were slightly increased in the range of 92-96%. The temperature of the lignite hydro-gasification with potassium catalyst dropped more than 150°C to achieve the same carbon conversion, compared to the temperature of the lignite hydro-gasification without catalyst. The experimental results showed that the potassium catalyst has superior catalysis on hydro-gasification of the lignite, and the carbon conversion of hydro-gasification could be up to 95%. The surface morphology and pore structure of coal samples with potassium catalyst loadings had been analyzed using scanning electron microscope (SEM) and gas adsorption/desorption analysis and the results showed that the specific surface areas and total pore volume decrease initially, and then increase with catalyst loadings increasing.