二甲醚氧化反应及其添加剂效应  

Oxidation of dimethyl ether and additives effect

作　　者：刘雄民[1] 黄品鲜[1] 加藤胜美[2] 和田有司[2] 田村昌三[3] 

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]日本产业技术综合研究所 [3]日本横滨国立大学

出　　处：《化工学报》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)~~

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.

关 键 词：二甲醚 添加剂 热稳定性 加速量热仪 活化能 

分 类 号：O643[理学—物理化学]