中文摘要：

在一个不锈钢压热器，没有催化剂并且与包含 Zn 催化剂，从脲和甲醇的 dimethyl 碳酸盐(直接数字控制) 的合成动力学独立被调查。没有催化剂，为直接数字控制合成(有到甲基氨基甲酸酯(MC ) 的甲醇的脲的反应) 的第一反应，反应动力学能关于甲醇和脲的集中被描述为第一份订单。为直接数字控制合成(有到直接数字控制的甲醇的 MC 的反应) 的第二反应，结果展出零顺序的反应的特征。为包含 Zn 催化剂，自从它的率比第二反应快得多，第一反应在动力学模型被忽视。自从它减少，第二反应的宏运动的参数被适合试验性的数据到一个伪 homogenous 模型，处于良好的竟技状态直接数字控制的过程的方面反应在被合并获得直接数字控制的收益急速地在高温度。当直接数字控制的方面反应的是 135 kJ/mol 时，对直接数字控制的从 MC 的反应的激活精力是 104 kJ/mol。直接数字控制的最高的收益是 23% 。

英文摘要：

In a stainless steel autoclave, the synthesis kinetics of dimethyl carbonate （DMC） from urea and methanol was separately investigated without catalyst and with Zn-containing catalyst. Without catalyst, for the first reaction of DMC synthesis （the reaction of urea with methanol to methyl carbamate （MC））, the reaction kinetics can be described as the first order with respect to the concentrations of both methanol and urea. For the second reaction of DMC synthesis （the reaction of MC with methanol to DMC）, the results exhibit characteristics of zero-order reaction. For Zn-containing catalyst, the first reaction is neglected in the kinetics model since its rate is much faster than the second reaction. The macro-kinetic parameters of the second reaction are obtained by fitting the experimental data to a pseudo-homogenous model, in which a side reaction in forming process of DMC is incorporated since it decreases the yield of DMC drastically at high temperature. The activation energy of the reaction from MC to DMC is 104 kJ/mol while that of the side reaction of DMC is 135 kJ/mol. The highest yield of DMC is 23%.