VPO催化剂上C4烃的吸附与反应

梁日忠; 李英霞; 陈标华; 李成岳; 胡山鹰

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VPO催化剂上C4烃的吸附与反应

更新时间：2026-09-14

- VPO催化剂上C4烃的吸附与反应
- VPO催化剂上C4烃的吸附与反应
- Issue 2, (2004)
- 作者机构：
  
  1. ,山西,太原,030051
  2. 清华大学化学工程系
  3. 北京化工大学可控化学反应教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：
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- Published：2004
- 稿件说明：
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梁日忠, 李英霞, 陈标华, et al. VPO催化剂上C4烃的吸附与反应[J]. 2004, (2).
DOI：

梁日忠, 李英霞, 陈标华, et al. VPO催化剂上C4烃的吸附与反应[J]. 2004, (2). DOI：

摘要

　用漫反射傅立叶变换红外光谱法(DRIFTS)研究了VPO催化剂上C4烃正丁烷、1-丁烯和1

3-丁二烯选择氧化制顺酐的表面吸附及反应过程.VPO催化剂暴露在流动混合气组成为1.5%C4+21%O2+N2

流量为50mL/min的在高温高压池中

温度(100～400)℃.结果表明C4烃在催化剂表面吸附很弱

在三种C4烃的选择氧化反应中

均发现了吸附的顺酐和COX和H2O

气相中的C4烃与催化剂上的氧按Rideal机理进行选择氧化反应;检测到吸附的顺丁烯二酸和高活性的烯烃物种进一步证实了烯烃和马来酸是正丁烷选择氧化的中间物种.

Abstract

The adsorption and selective oxidation reaction of C4 hydrocarbon (%n%-butane

1-butene and 1

3-butadiene) to Maleic Anhydride on a commercial VPO catalyst have been investigated by in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS) with High Temperature/High Pressure chamber (HTHP) under steady-state conditions. The Catalyst was exposed to the flow of 50 mL/min of 1.5 moL% C4 in air mixture at different temperatures ranged from 50 to 400 ℃ in the HTHP chamber. Spectroscopic investigations show that the adsorption of C4 hydrocarbon on the VPO catalyst surface is very weak; Selective oxidation products (MA) and combustion products (CO

CO-2 and H-2O) could be confirmed on the catalyst surfaces. C4 hydrocarbon reacts with oxygen on the surface of the VPO catalyst according to Rideal mechanism. Adsorbed Maleic acid and activated olefin were detected as surface intermediates; this suggests that olefins and maleic acid could be intermediates in paraffin selective oxidation.

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北京化工大学可控化学反应教育部重实验室

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