等离子体技术制备Ni/α-Al_2O_3催化剂  

The use of plasma techniques in Ni/α-Al_2O_3 catalyst preparation

作　　者：张勇[1] 储伟[1] 罗春容[1] 周坤麟[1] 文晓刚[1] 曹伟民[1] 

机构地区：[1]中国科学院成都有机化学研究所,成都610041

出　　处：《天然气化工—C1化学与化工》2000年第1期15-18,共4页Natural Gas Chemical Industry

摘　　要：采用射频辉光放电等离子体技术制备了用于天然气部分氧化制合成气反应的α Al2 O3担载金属Ni催化剂。考察了该催化剂的反应活性、稳定性 ,并与常规方法制备的催化剂进行了比较。结果表明 ,采用等离子体技术制备的催化剂 ,具有操作简便、工艺流程短、催化剂变化过程直观易控、催化剂活性高、稳定性好等优点 ,在 850℃反应时可获得 98 2 %天然气转化率 ,97 3%H2 选择性和 96 5%CO选择性 ,并且反应 1 5h后催化剂活性几乎未下降。XRD和TPR实验结果表明 ,采用等离子体技术制备的催化剂的晶相组成和还原性能与常规催化剂有很大差别。Nickel-based catalysts supported on α-Αl 2O 3 for the partial oxidation of natural gas were prepared by a glow discharge plasma technique They were tested for examing activity and stability,and compared with conventional catalysts It was found that the process of preparing catalysts by plasma was simple,quick,audiovisual and easy to controll,and the activity and stability of the catalyst prepared by plasma were higher than that of those conventional catalysts The natural gas conversion at 98 2% and selectivity of 97 3% to hydrogen and 96 5% to carbon monoxide were obtained at 850℃over the catalyst prepared by plasma,and the catalyst maitain its activity for more than 15h According to the resuts of X ray diffraction(XRD)and temperature-programmed reduction(TPR),the component of crystal phase and the reducibility of the catalyst were significantly different from those of conventional catalysts

关 键 词：等离子体技术 天然气 部分氧化 镍基催化剂 制备 

分 类 号：TQ426.81[化学工程] O646.9[理学—物理化学]