新型催化剂上甲醇合成反应本征动力学

Intrinsic Kinetics of Methanol Synthesis over a New Catalyst

在等温积分反应器中测定了甲醇合成反应本征动力学。实验采用粒度为0．154～0．198mm的国产新型NC309催化剂，反应温度190-250℃，反应压力为4～8MPa，体积空速6500～16000h^-1。实验结果表明，总碳转化率在实验温度范围内随温度的升高先增加后降低，在235℃左右达到最大值，并随压力的升高而增加。选取双曲型动力学方程的形式建立了以各组分逸度表示的CO和CO2加氢合成甲醇的双速率本征动力学模型，用参数估值方法获得了动力学模型参数。残差分析和统计检验表职，该动力学模型能较好地描述实验结果。

The intrinsic kinetics of methanol synthesis was investigated in an isothermal integral reactor over a new catalyst NC309 with the size of 0. 154 -0. 198 mm under the conditions of 6 500-16 000 h-1 space velocity, 190-260 ℃ temperature and 4-8 MPa pressure. The experimental results showed that the total carbon conversion reached a maximum value at 235℃ and increased monotonously with the increasing of the pressure. The intrinsic kinetic models of the Langmuir- Hinshelwood type were obtained in the form of the reactant fugacity for the hydrogenation of carbon monoxide and carbon dioxide. The parameters were estimated by the parameter estimation method based on the experimental data. Residual error distribution and statistic test showed that the intrinsic kinetic models were liable and acceptable.