担体上残留溶剂对多相CO加氢反应的影响  

Effect of supporter's residual solvent on CO hydrogenation

作　　者：索全伶[1] 殷元琪 陶克[1] 乌乐[1] 

机构地区：[1]内蒙古工业大学化工系,中科院兰州化学物理研究所,内蒙古大学化学系

出　　处：《天然气化工—C1化学与化工》1995年第3期36-38,共3页Natural Gas Chemical Industry

基　　金：国家自然科学基金

摘　　要：利用气相色谱检测及程序升温脱附（ＴＰＤ）的方法，对残留有ＣＨ２Ｃｌ２溶剂的负载型双金属簇催化剂及γ－Ａｌ２Ｏ３的ＣＯ加氢反应进行了详细研究，并发现在反应条件下残留溶剂可离解出亚甲基（ＣＨ２）参与ＣＯ加氢反应，从而对产物分布产生影响。在４００℃进行ＣＯ加氢反应时，担体上残留溶剂发生分解，产物中低碳烯烃的生成量急剧增加，对乙烯的选择性最高可达９３．６％。用担体γ－Ａｌ２Ｏ３进行的空白对照实验也得到了类似的结果。残留有ＣＨ２Ｃｌ２溶剂的γ－Ａｌ２Ｏ３程序升温脱附结果显示，反应中产生的亚甲基是ＣＯ加氢反应的活性中间体。O hydrogenation using supported bimetallic cluster catalyst with residual solvent (CH2Cl2) on supporter (γ-Al2O3) has been studied by GC and TPD techniques. It was found that under reaction conditions surface active species methene(CH2) could be separated from the residual solvent and take part in CO hydrogenation. Therefore, the residual solvent on supporter would affect the product distribution of CO hydrogenation.When CO hydrogenation proceeded at 400℃,the residual solvent on supporter would decompose, the amount of light olefin would rapidly increase,and the highest selectivity to ethene could reach 93.6%. The similar result was obtained by supporter's blank contrast experiment. The TPD results of supporter with residual solvent showed that methene produced by thermal resolving residual solvent was the surface active species in CO hydrogenation.

关 键 词：加氢反应 残留溶剂 反应机理 一氧化碳 

分 类 号：O613.71[理学—无机化学] O643.12[理学—化学]