高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

醋酸对环己烷气相氧化脱氢产物选择性影响的研究

朱宇君1,2, 李静1, 杨向光1, 吴越1   

  1. 1. 中国科学院长春应用化学研究所, 长春 130022;
    2. 黑龙江大学化学化工学院, 哈尔滨 150080
  • 收稿日期:2005-05-17 修回日期:1900-01-01 出版日期:2006-06-10 发布日期:2006-06-10
  • 通讯作者: 杨向光

Effects of Acetic Acid on Product Selectivity in Gas Phase Oxidative Dehydrogenation of Cyclohexane

ZHU Yu-Jun1,2, LI Jing1, YANG Xiang-Guang1*, WU Yue1   

  1. 1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
    2. College of Chemistry and Chemical Engineering, Heilongjiang University, Harbin 150080, China
  • Received:2005-05-17 Revised:1900-01-01 Online:2006-06-10 Published:2006-06-10
  • Contact: YANG Xiang-Guang

PDF (PC)

被引次数

7

摘要： 以α1-VOPO4相为催化剂, 在环己烷气相氧化脱氢反应中, 通过在原料中加入醋酸可控制反应产物的分布. 研究了不同醋酸量对目标产物选择性的影响, 醋酸在反应体系中优于环己烷吸附在α1-VOPO4催化剂的表面上, 使催化剂表面形成孤立的活性中心, 避免了产物环己烯的深度氧化. 反应温度为450 ℃, 醋酸与环己烷的摩尔比为12.9∶1时, 环己烷的转化率为6.9%, 环己烯的选择性为100%.

关键词: α1-VOPO4催化剂, 环己烷, 环己烯, 醋酸, 气相氧化脱氢

Abstract: The effect of adding acetic acid on the product distribution in gas phase oxidative dehydrogenation of cyclohexane over α1-VOPO4 catalyst was investigated. The role of acetic acid in the reaction process was put forward. The proposed mechanism is that acetic acid take precedence of cyclohexane adsorbing on the active sites of α1-VOPO4 catalyst to form isolated active site. Thus, cyclohexene species can desorb quickly from the active sites, avoiding its deep oxidation dehydrogenation. Almost 100% selectivity to cyclohexene could be obtained when the molar ratio of acetic acid to cyclohexane was 12.9∶1 at 450 ℃, the conversion of cyclohexane was 6.9%.

Key words: α1-VOPO4 catalyst, Cyclohexane, Cyclohexene, Acetic acid, Gas phase oxidative dehydrogenation

中图分类号: 

TrendMD: