富CO合成气三相床甲醇合成过程研究

Influences of main reaction factors on methanol synthesis process utilizing CO-rich syngas

研究了在富 CO合成气条件下、于机械搅拌反应釜中主要反应条件对三相床甲醇合成过程的影响 ,分析并讨论了传质过程对总反应过程的作用 .实验结果表明 :在本文的实验范围内 ,随温度、压力增加 ,甲醇生成速率及 CO转化率均增加 ;随合成气质量空速增加 ,甲醇生成速率增加 ,而 CO转化率降低 .为便于分析传质过程的影响 ,本文提出了三相床甲醇合成过程的准本征动力学的概念 .将本文所得到的准本征动力学与气固两相本征动力学比较 ,发现 :温度 (或压力 )对三相甲醇过程的影响程度低于气固相 ,且随压力 (或温度 )增加 。

Influences of main reaction factors on liquidphase methanol synthesis process were studied in a wellmixed stirred slurry reactor under COrich condition. The experimental results show that methanol productivity and CO conversion increase with the reaction temperature and pressure, and that with feed rate increasing methanol productivity also increases whereas CO conversion decreases. To be convenient for analyzing to effects of mass transfer, a conception of quasiintrinsic kinetics of threephase methanol synthesis process was put forward in this paper. By comparing the quasiintrinsic kinetics obtained in this work with gassolid twophase methanol synthesis, it was found that the threephase methanol synthesis process is much less dependent on the temperature and the pressure than the twophase system. In additions to, it turns out that C302 type copperbased catalyst can well be applied for liquidphase methanol synthesis process under the condition of COrich syngas.