太原理工大学学报2018，Vol.49Issue(2)：196-203,8.DOI:10.16355/j.cnki.issn1007-9432tyut.2018.02.004
活性半焦负载γ-MoNxCy的制备及其在甲烷化反应中的应用
Preparation of Activated Semi-coke Supported γ-MoNxCy and Its Catalytic Performance for Methanation Effects
摘要
Abstract
Activated semi-coke supported molybdenum carbides were prepared by pyrolyzing the mixture of HLH de-ashed lignite and the complex of hexamethylentetramine(HMT)and am-monium molybdate (AHM)with different preparation methods.The effects of preparation meth-od on methanation were evaluated.The results show that preparation method heavily influenced the crystal structure,morphology and catalytic activity of the catalysts,the conversion of CO (XCO)and the selectivity of CH4(SCH4)were the best on the catalyst prepared by the deposition-precipitation method,the next was the catalyst prepared by mechanically mixing HLH de-ashed lignite with the complex of HMT and AHM and then thermally decomposing,while the catalytic activity of the catalyst prepared by mechanically mixing the semi-coke of HLH de-ashed lignite with β-Mo2C was the worst.The catalytic activity of all activated semi-coke supported molybde-num carbides are better than that of bulk β-Mo2C.This may be due to the dual action of the im-proved dispersion of Mo and the improved catalytic activity on account of the formation of γ-MoNxCydue to the interaction between active metal component and the catalyst support.关键词
碳化钼/活性半焦/制备方式/甲烷化Key words
molybdenum carbide/activated semi-coke/preparation methods/methanation分类
化学化工引用本文复制引用
张戎,范寒寒,王娟,霍晓东,房倚天..活性半焦负载γ-MoNxCy的制备及其在甲烷化反应中的应用[J].太原理工大学学报,2018,49(2):196-203,8.基金项目
中国科学院战略性先导科技专项0501课题资助项目(XDA07050100) （XDA07050100）
