在Lurgi型甲醇合成反应器中铜基催化剂的失活特性

Deactivation of copper-based catalyst used in a Lurgi reactor for methanol synthesis

采用并联双管恒温反应器和化学分析、光谱分析、X射线荧光分析3种分析方法,测量了从Lurgi型甲醇合成塔不同部位取样的某铜基催化剂的活性,微量毒物的含量和晶体的粒度。分析结果证明,使用过的这种催化剂已经失活且失活程度随着气体的流向越来越轻。失活原因,一是S、Fe、Ni毒物使催化剂中毒,二是催化剂晶粒长大。

The activity,trace poisonous substances and crystallite size of the copper-based catalysts taken from different locations of a commercial multitubular reactor for methanol synthesis were tested by the chemical analysis,ESCA and X-ray fluorescence respectively. The analytical results indicate that the used catalysts have lost their activity and the deactivation tends to reduce with the gas flowing direction. The reasons for deactivation are S,Fe and Ni poisoning and the growth of crystallite size of the catalyst.