CAJ | 학술논문

在间歇反应釜内，以甲醇钠为催化剂，对碳酸二甲酯与乙醇酯交换合成碳酸二乙酯反应进行了研究，考察了催化剂浓度、反应温度、乙醇与碳酸二甲酯的摩尔配比等因素对酯交换反应的影响，通过数据校正优化了实验原始数据，建立了动力学模型并进行严格的模型检验，得到了可靠的模型参数。结果表明，该反应为连串反应，中间产物为碳酸甲乙酯，反应焓分别为?H10=-1.595 kJ?mol-1，?H20=0.809 kJ?mol-1；两个反应均为可逆反应，活化能分别为Ea1+=45.633 kJ?mol-1和E a1-=47.228 kJ?mol-1、E a2+=55.058 kJ?mol-1和E a2-=54.249 kJ?mol-1。
재간헐반응부내，이갑순납위최화제，대탄산이갑지여을순지교환합성탄산이을지반응진행료연구，고찰료최화제농도、반응온도、을순여탄산이갑지적마이배비등인소대지교환반응적영향，통과수거교정우화료실험원시수거，건립료동역학모형병진행엄격적모형검험，득도료가고적모형삼수。결과표명，해반응위련천반응，중간산물위탄산갑을지，반응함분별위?H10=-1.595 kJ?mol-1，?H20=0.809 kJ?mol-1；량개반응균위가역반응，활화능분별위Ea1+=45.633 kJ?mol-1화E a1-=47.228 kJ?mol-1、E a2+=55.058 kJ?mol-1화E a2-=54.249 kJ?mol-1。
The synthesis of diethyl carbonate using dimethyl carbonate and ethanol and catalyzed by sodium methoxide was studied experimentally in a batch stirred tank reactor. The effects of catalyst dosage, temperature, and molar ratio of ethanol to dimethyl carbonate on trans-esterification were investigated. A kinetic mathematical model was built to describe the reaction. It is found that the reaction consists two parts, and the intermediate product is methyl ethyl carbonate. The reaction heat is -1.595kJ?mol-1 for the first trans-esterification reaction and 0.809 kJ?mol-1 for the second one. Both of them are reversible. The forward and reverse activation energies of the first reaction are 45.633 kJ?mol-1 and 47.228 kJ?mol-1, respectively, while the second one shows that of 55.058 kJ?mol-1 and 54.249 kJ?mol-1, respectively.