Mo-Ni/γ-Al_2O_3甲烷化催化剂MoNi_4合金的生成及其作用  

Producing and Effect of MoNi_4 Alloy in Mo-Ni/γ-Al_2O_3 Methanation Catalysts

作　　者：牛雪平[1] 江雅新[1] 石玉[1] 苗茵[1] 王晓晶[1] 赵军[1] 新民[1] 

机构地区：[1]内蒙古大学化学系,内蒙古呼和浩特010021

出　　处：《内蒙古大学学报（自然科学版）》1999年第6期709-714,共6页Journal of Inner Mongolia University：Natural Science Edition

基　　金：国家自然科学基金

摘　　要：通过变化浸渍液的ｐＨ 值、焙烧温度及还原温度制备了几种Ｍｏ－Ｎｉ／γ－Ａｌ２Ｏ３ 甲烷化催化剂，用Ｘ 射线粉末衍射（ＸＲＤ）、透射电子显微镜（ＴＥＭ）法对催化剂的结构和性能进行了考察，用脉冲气相色谱法测定了催化剂的ＣＯ 甲烷化活性及抗硫性．结果表明，Ｍｏ－Ｎｉ催化剂经还原处理后有ＭｏＮｉ４ 合金生成，ＭｏＮｉ４ 合金是主要的抗硫活性相。Several Mo Ni/γ Al 2O 3 methanation catalysts were prepared by changing the pH value of impregnation solution,calcination temperature and reduction temperature.The structures and properties were investigated by X ray powder diffraction and Transmission electron microscopy methods.Methanation activity from carbon monoxide and resistivity to sulfur poisoning were examined by impulse chromatography.Studies showed:A MoNi 4 alloy was detected by reducing the catalysts.It was the active sulfur resistant phase principally and enhanced strongly the sulfur resistance of the solid during methanation reaction.

关 键 词：甲烷化 抗硫性 钼镍合金 催化剂 三氧化二铝 

分 类 号：O643.36[理学—物理化学]