[（VO）2P2O7催化剂上正丁烷选择性氧化反应途径的原位瞬态漫反射红外傅里叶变换光谱研究]

[In-situ transient DRIFTS studies of the reaction pathway of n-butane selective oxidation over (VO)2P2O7 catalysts].

作者信息

Liang Ri-zhong, Li Ying-xia, Li Cheng-yue, Chen Biao-hua

机构信息

Key Lab of Education Ministry on Controlling Chemical Reaction, Beijing University of Chemical Technology, Beijing 100029, China.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2004 Nov;24(11):1309-14.

PMID:15762463

Abstract

The reaction pathway of n-butane selective oxidation to maleic anhydride (MA) over vanadium phosphorous oxide (VO)2P2O7 catalysts was systematically probed using in situ transient Diffuse Reflectance Infrared Fourier-Transform Spectroscopy (DRIFTS) in high temperature/high pressure chamber. The unsaturated and saturated noncyclic carbonyl species were determined to be intermediates in n-butane selective oxidation to MA. Furan was detected on the surface of the (VO)2P2O7 catalysts in 1-butene, 1,3-butadiene selective oxidation. It was deduced that furan ring was cleaved to form unsaturated noncyclic carbonyl species before its conversion to MA. Based on these results and in comparison with the literature, a simplified scheme of the reaction network structure can be proposed for n-butane selective oxidation to maleic anhydride.

摘要

在高温/高压腔室中，采用原位瞬态漫反射红外傅里叶变换光谱（DRIFTS）系统地探究了正丁烷在钒磷氧化物(VO)₂P₂O₇催化剂上选择性氧化制马来酸酐（MA）的反应途径。不饱和和饱和非环状羰基物种被确定为正丁烷选择性氧化制MA过程中的中间体。在(VO)₂P₂O₇催化剂表面检测到1-丁烯、1,3-丁二烯选择性氧化过程中的呋喃。据推断，呋喃环在转化为MA之前会裂解形成不饱和非环状羰基物种。基于这些结果并与文献比较，可提出正丁烷选择性氧化制马来酸酐反应网络结构的简化方案。