高等学校化学学报2016，Vol.37Issue(8)：1521-1527,7.DOI:10.7503/cjcu20150948
等离子体还原催化剂在CO2甲烷化反应中的活性
Activity of Catalysts Reduced by Plasma in CO2 Methanation†
摘要
Abstract
Ni-Ce/γ-Al2 O3 and Ni-Ce-LDHs/γ-Al2 O3 catalyst precursors were synthesized by impregnation and in situ chemical-growing methods, respectively. These precursors were reduced by Ar-H2 cold plasma jet and conventional H2 thermal reduction. The evaluation of these catalysts were carried out in a CO2 methanation reaction system. The results showed that the catalysts reduced by plasma had better catalytic activity, the reaction start-temperature with catalysts reduced by plasma was 20—30 ℃ lower than that with catalysts by conventional method. The catalysts were characterized by X-ray diffraction ( XRD ) , transmission electron microscopy( TEM) , CO2-temperature programmed desorption ( CO2-TPD ) , as well as X-ray photoelectron spectrum( XPS) . The results showed that plasma reduction could remarkably improve the dispersion of active components, the alkalinity of support and the size of crystal metal particles. It was these improvements that enhanced the activity of catalysts in methanation reaction.关键词
等离子体/镍/二氧化碳/甲烷化/催化性能Key words
Plasma/Nickel/Carbon dioxide/Methanation/Catalytic performance分类
化学化工引用本文复制引用
张燕平,杨春辉,陈攀,冉唐春,李娇,印永祥..等离子体还原催化剂在CO2甲烷化反应中的活性[J].高等学校化学学报,2016,37(8):1521-1527,7.基金项目
国家自然科学基金(批准号:11075113)资助.? Supported by the National Natural Science Foundation of China(No.11075113) （批准号:11075113）
