摘要
考察了乙烷在Ｌａ２Ｏ３催化剂上的氧化脱氢反应，催化剂表面积４～５２ｍ２／ｇ，反应温度７０３～７９３Ｋ，主要产物为Ｃ２Ｈ４、ＣＯ２、ＣＯ和Ｈ２Ｏ，反应温度高时可检测到ＣＨ４。催化剂表面积增加，其固有活性（单位表面积上的转化率）下降，而对乙烯的选择性几乎不变，反应是纯化学性质的表面反应，选择氧化和深度氧化可能经相同活性中心进行，该活性中心可能是处于平面位置上具有高配位数的离子，另就反应涉及到的某些化学问题提出一些见解。
xidative dehydrogenation of C2H6 on La2O6 with BET surface area of 4～52 m2/g has been investigated at temperatures ranging from 703 to 793K. Main products are C2H4,CO2, CO and H2O, CH4 can be observed at higher temperature. The intrisic activity is decreasing as the BET area is increased and the selectivity of the catalysts remains unchanged.The reaction proceeds on the Surface of catalysts. Selective and deep oxidation may occur on the same active center which locates on the Plane position of the surface. Some viewpoints concerning certain chemical nature of the reaction have also been put forward.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
1995年第6期8-11,24,共5页
Natural Gas Chemical Industry
关键词
氧化脱氢
氧化镧
催化剂
La_2O_3, ethane, oxidative dehydrogenation
