C302铜基甲醇合成催化剂颗粒设计 Ⅱ.颗粒结构对Lurgi型合成反应器性能的影响

PELLET DESIGN OF C302 Cu-BASED CATALYST FOR METHANOL SYNTHESIS Ⅱ. EFFECT OF PELLET STRUCTURE DESIGN ON THE LURGI TYPE REACTOR PERFORMANCE

基于本文 (Ⅰ )报的研究结果 ,以固定床反应器二维非均相数学模型为基础 ,模拟考察了C30 2铜基甲醇合成催化剂颗粒设计对Lurgi型合成反应器性能的影响。结果表明 ,由于颗粒结构设计改变了粒内反应—扩散耦合行为的相互匹配关系 ,使得催化剂的宏观反应活性发生变化 ,进而对反应器的操作性能产生显著的影响 (包括反应器生产能力、温度和浓度分布特性、床层压力降和热点温度等 ) ,为提高反应器的生产能力和改善反应器的操作性能 ,进行催化剂颗粒的适宜结构设计是非常必要和有价值的。

Based on the results achieved in the first part of this paper, the effect of pellet structure design of C302 Cu-based catalyst for methanol synthesis on the Lurgi type reactor performance was investigated by means of the two-dimensional mathematical model of a fixed reactor. The results show that the differences of the catalyst pellet structure not only influence itself global reaction activity, but also have considerable influence on the reactor operation performances (including reactor throughput, temperature and concentration distribution characteristics of catalyst bed, pressure drop and hotspot temperature etc.). These results also indicate that the suitable pellet structure design is necessary and valuable for significant further improvement of both reactor throughput and reactor operation performance, because the intraparticle diffusion process always plays an important role in the industrial methanol synthesis.