摘要
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,Fe2O3 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.
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, Fe2O3 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.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2008年第10期2634-2637,共4页
CIESC Journal
基金
广西科学基金项目(桂科基0639001)~~
关键词
二甲醚
添加剂
热稳定性
加速量热仪
活化能
dimethyl ether
additives
heat stability
accelerating rate calorimeter
activation energy
作者简介
刘雄民（1960-），男，教授。E—mail：xmliu1@gxu．edu．cn
