催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (6): 1022-1026.DOI: 10.3724/SP.J.1088.2011.10136

• 研究论文 • 上一篇    下一篇

组合催化剂上丙烷选择氧化制丙烯酸

方雯 1,2, 葛庆杰 1,a, 俞佳枫 1,2, 徐恒泳 1,b   

  1. 1中国科学院大连化学物理研究所, 辽宁大连 116023; 2中国科学院研究生院, 北京 100049
  • 收稿日期:2011-01-19 修回日期:2011-02-28 出版日期:2011-06-21 发布日期:2014-10-31

Propane Selective Oxidation to Acrylic Acid over Combined Catalysts

FANG Wen1,2, GE Qingjie1,a, YU Jiafeng1,2, XU Hengyong1,b   

  1. 1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-01-19 Revised:2011-02-28 Online:2011-06-21 Published:2014-10-31

PDF

750

被引次数

5

摘要： 考察了在 C3H8 氧化脱氢的 NiZrO 催化剂和 C3H6 选择氧化的 Mo 基催化剂组成的组合催化剂上 C3H8 选择氧化制取丙烯酸的反应性能. 结果表明, 两个催化剂比例适当时, 反应的丙烯酸收率可达最大. 优化温度、烷氧比、空速以及 N2 含量等反应条件的结果发现, 反应体系中 O2 的匮乏会严重影响反应性能. 在有氧分布器的反应装置中对所选组合催化剂在优化的反应条件下进行了 30 h 稳定性测试, 结果表明, 在 340 oC, 反应性能基本稳定, C3H8 转化率和丙烯酸选择性可分别维持在 ~20% 和 ~74%.

关键词: 丙烷, 选择性氧化, 丙烯酸, 组合催化剂, 氧分布器

Abstract: A double-layer catalyst, containing a NiZrO catalyst for propane oxidative dehydrogenation and a Mo-based mixed metal oxide catalyst for propylene selective oxidation, was applied to propane selective oxidation to acrylic acid. The composition of the combined catalyst was first adjusted. When the mass ratio of the two components was 1:1, a maximum acrylic acid yield was achieved. The effects of reaction conditions were studied, including temperature, space velocity, V(C3H8)/V(O2) ratio, and N2 content. Based on the use of an O2-distributor, the stability test was carried out. During 30 h operation at 340 oC, propane conversion and acrylic acid selectivity remained at ~20% and ~74%, respectively.

Key words: propane, selective oxidation, acrylic acid, combined catalyst, O2-distributor