A comparative study on the autoxidation of dimethyl ether (DME) comparison with diethyl ether (DEE) and diisopropyl ether (DIPE)
A comparative study on the autoxidation of dimethyl ether (DME) comparison with diethyl ether (DEE) and diisopropyl ether (DIPE)
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DOI：
10.1016/j.jlp.2005.07.001
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发表时间：
2005-07-01
影响因子：
3.5
通讯作者：
Tamura, M
中科院分区：
文献类型：
--
作者：
Naito, M;Radcliffe, C;Tamura, M
日本政府正计划引进二甲醚作为石油和液化天然气的替代能源。二甲醚的引入对防止全球变暖和资源循环型社会的形成都有很大的贡献。在这种情况下，当DME被大规模使用时，DME的安全性评估是非常重要的。二甲醚在运输和储存过程中，长时间暴露在空气中可能会引起自氧化，产生爆炸性有机过氧化物。因此，二甲醚与氧气的反应性和自氧化的机理进行了研究。采用加速量热法（ARC）研究了二甲醚（DME）和过氧化物产生剂二异丙基醚（DIPE）在绝热和不同大气条件下的热稳定性。在ARC研究DME在氧气下，放热分解检测到，虽然它的自热速率是低的相比，DIPE。进行了烘箱储存试验，并采用碘量法测量了DME与DIPE和DEE产生的过氧化物浓度。然而.用GC/MS或碘量法都没有发现DME的产物，而从这些实验中获得了DEE和DIPE自氧化的一些证据。(c)2005爱思唯尔有限公司保留所有权利。
The Japanese government is planning to introduce DME as a substituted energy for oil and LNG. Introduction of DME could contribute greatly to both the prevention of global warming and the formation of resource-recycling societies. In these circumstances, a safety assessment of DME is very important when DME is used on a large scale. There is a possibility that prolonged exposure in air induces autoxidation to produce explosive organic peroxides during transportation and storage of DME. Therefore, the reactivity of DME with oxygen and the mechanism of the autoxidation were investigated. Accelerating Rate Calorimetry (ARC) was used to evaluate the thermal stability of DME and DIPE, a known peroxide producers, under adiabatic and various atmospheric conditions. In ARC studies of DME under oxygen, exothermic decompositions were detected although its self-heating rate was low in comparison with DIPE. Oven storage tests were carried out and iodimetry was used to measure the concentration of peroxides produced from DME in comparison with DIPE and DEE. However. no products could be found for DME either by GC/MS or by iodimetry, while some evidence of autoxidation of both DEE and DIPE were obtained from these experiments. (c) 2005 Elsevier Ltd. All rights reserved.