Ag-ZSM-5分子筛上乙醇氧化过程中积碳行为的研究  

Carbon Deposit on Ag ZSM 5 Molecular Sieve in Ethanol Oxidation

作　　者：李景林[1] 李斌[1] 梁宇宁 韦承谦[1] 

机构地区：[1]广西大学化学化工学院

出　　处：《广西科学》1999年第2期106-108,共3页Guangxi Sciences

基　　金：广西自然科学基金

摘　　要：用不同银含量及不同硅铝比的Ａｇ－ＺＳＭ－５分子筛催化乙醇氧化成乙醛，采用高温氧化烧炭法考察了银含量、硅铝比及反应温度对催化过程中积炭行为的影响。结果表明：高ＳｉＯ２／Ａｌ２Ｏ３时积炭较慢；Ａｇ含量超过１０％，对积炭速率影响不大；反应温度高时积炭速率减慢，但是选择性及转化率降低。Ag ZSM 5 was used to catalize the oxidation of ethanol to acetaldehyde ,and the effects of Ag content,Si∶Al ratio and reaction temperature on carbon deposit behavior in the oxidation were examined by the high temperature oxidation.The results showed that carbon deposit was slow at high SiO∶Al 2O 3 ratio ,and there were no much affection on carbon deposit at over 10% of Ag content;and carbon deposit was slow at high temperature,but selectivity and conversion were slow.It was found that Ag ZSM 5 with being improved Sn had a good resistance to carbon deposit.

关 键 词：积炭 ZSM-5 硅铝比 乙醛 分子筛 乙醇 氧化 

分 类 号：O623.411[理学—有机化学] O643.36[理学—化学]