Oxidation of dimethyl ether and additives effect

LIU Xiongmin; HUANG Pinxian; KATOH Katsumi; WADA Yuji; TAMURA Masamitsu

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Oxidation of dimethyl ether and additives effect

更新时间：2025-12-10

- Oxidation of dimethyl ether and additives effect
- CIESC Journal Issue 10, Pages: 2634-2637(2008)
- 作者机构：
  
  1. 广西大学化学化工学院
  2. 日本产业技术综合研究所
  3. 日本横滨国立大学
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 October 2008，
  
  Published：05 October 2008
- 稿件说明：
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LIU Xiongmin, HUANG Pinxian, KATOH Katsumi, et al. Oxidation of dimethyl ether and additives effect[J]. CIESC Journal, 2008, (10): 2634-2637.
DOI：

LIU Xiongmin, HUANG Pinxian, KATOH Katsumi, et al. Oxidation of dimethyl ether and additives effect[J]. CIESC Journal, 2008, (10): 2634-2637. DOI：

摘要

采用加速量热仪（ARC）测定了二甲醚（DME）氧化反应温度变化和活化能（Ea），考察了添加剂对DME热稳定性效应，分析热分解产物，探讨氧化反应机理. 结果表明，DME热氧化反应初始温度（To）为120 ℃，反应活化能Ea=167.3 kJ8226;mol-1.氧的存在是导致DME热稳定性下降重要因素，在氧化反应体系中添加Fe、Fe2O3、Al等时， To和Ea值减小，它们有促进氧化反应作用，特别是有过氧化物存在下，由于自由基的引发，显著降低DME热反应初始温度和反应活化能，抗氧剂能提高热稳定性.

Abstract

Initiating temperature (To) and activation energy (Ea) for thermal oxidation of dimethyl ether (DME) was measured with accelerating rate calorimeter (ARC)The effect of additives on DME thermal stability was studiedThe product of DME thermal decomposition was analyzed with GCMSThe results indicated that the initiating temperature of DME oxidation was 120℃

activation energy was 167.3 kJ·mol-1 in vacuumDME stability was dramatically reduced in the presence of oxygenThe addition of Fe

Fe2 O3 and Al also decreased To and Ea of DME oxidation reaction

especially in the presence of hydrogen peroxide (H2O2) or other organic peroxides which can easy initiate the formation of free radicalsIn contrast

the presence of antioxidant can enhance DME thermal stability.

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