时间分辨红外光谱法测定乙醛的降解  

Study of the degradation of acetaldehyde by time-resolved infrared spectrometry

作　　者：闵良[1] 李俊杰[1] 王家强[1] 夏非[1] 

机构地区：[1]云南大学应用化学系,云南昆明650091

出　　处：《云南大学学报（自然科学版）》2007年第4期401-403,407,共4页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(200463003);云南省自然科学基金重点资助项目(2004E0003Z);留学回国人员科研启动基金资助项目(k1010541)

摘　　要：采用1种新的方法——时间分辨红外光谱法,监测了MCM-41,Co-MCM-41在暗反应情况下乙醛降解的反应过程.检测了相关产物以及它们随时间变化的情况,结果表明,在Co-MCM-41降解乙醛体系中,检测到了醋酸钴盐、甲烷和水的生成,并且一段时间后它们的浓度随反应时间的延长而逐步增加.而在MCM-41降解乙醛体系中只监测到乙醛的吸附过程,并无降解反应发生.The degradation kinetics of acetaldehyde in the gas phase over MCM-41 and Co-MCM-41 under dark condition was studied by time-resolved Infrared spectrometry. It was found that Co-MCM-41 is an efficient catalyst for acetaldehyde degradation under room temperature. The formation of water and acetate over Co-MCM-41 was detected, and their concentrations were increased with the increase of reaction time. By contrast, MCM-41 is a negative catalyst to acetaldehyde degradation even though it showed strong adsorption to acetaldehyde.

关 键 词：时间分辨-红外光谱仪 介孔 乙醛 降解 

分 类 号：O657.33[理学—分析化学]