甲烷氧化偶联W－Mn／SiO_2催化剂的稳定性考察  

Stability Test of W- Mn/SiO_2 Catalyst for Oxidative Coupling of Methane

作　　者：林景治[1] 顾靖芳 杨得信[1] 张传卫[1] 杨英兰 褚衍来[1] 李树本[1] 

机构地区：[1]中国科学院兰州化学物理研究所

出　　处：《石油化工》1995年第5期293-298,共6页Petrochemical Technology

摘　　要：报道了Ｗ－Ｍｎ／ＳｉＯ＿２混浆催化剂分别在０．２和３０ｍｌ固定床进行１０００和５００ｈ的稳定性试验结果，并用ＸＲＤ、ＦＴ－ＩＲ和ＢＥＴ方法对催化剂进行了表征。结果表明，该催化剂具有良好的ＣＨ＿４氧化偶联制Ｃ＿２烃的催化活性和稳定性。结构测试表明，在５００ｈ反应后，该催化剂中结晶形式的Ｎａ）２ＷＯ＿４和Ｍｎ＿２Ｏ＿３均已消失，α－方石英已完全转变为α－鳞石英和α－ＳｉＯ＿２石英。但催化剂的这种结构变化尚未对生成Ｃ＿２烃的收率和选择性产生明显影响。In this paper,the results of 1000 and 500h stability tests respectively made on fixed- bed reactors holding 0.2 and 30ml catalysts were given,The catalysts were characterized byXRD,FT-IR and BET. The results show that the catalysts have good catalytic activity andstability for Oxidative coupling methane.Structural studies of catalyst indicate that crystalline Na_2WO_4 and Mn_2O_3 in the catalystshave vanished,and α-cristobalite structure has transformed to α-tridymite structure andα-SiO_2 quartz. However,the yield and selectivity of forming C_2 hydrocarbons are not affectedby the structural changes.

关 键 词：甲烷 氧化偶联 催化剂 稳定性 乙烯 

分 类 号：O623.121[理学—有机化学]