高压法聚乙烯管式反应器模拟研究

Simulation of a High-pressure Ethylene Polymerization Tubular Reactor

基于Aspen Plus建立管式法聚乙烯反应器模型,在此基础上研究反应器温峰、引发剂配比和反应器热水温度等参数对LDPE分子链结构、乙烯转化率和引发剂单耗的影响。研究结果表明,调聚剂含量不变的情况下,LDPE的数均分子量主要受反应器温峰的影响,LDPE的分子量分布宽度主要受反应器热水温度和反应器温峰的影响,乙烯转化率主要受反应器热水温度的影响,而引发剂单耗主要受上游反应区温峰和引发剂配比的影响。

A tubular polyethylene reactor model was established in Aspen Plus.The effects of the reactor temperature peak value,initiator ratios and reactor cooling water temperature on the molecular chain structure,ethylene conversion rate and initiator consumption were investigated respectively.The results show that the number average molecular weight of LDPE is mainly affected by the reactor temperature peak value when the modifier is constant,and the molecular weight distribution of LDPE is mainly affected by the cooling water temperature and the reactor temperature peak values.Meanwhile,the ethylene single-pass conversion is mainly affected by the cooling water temperature,and the initiator consumption is mainly affected by the reactor temperature peak values of the upstream reaction zone and the initiator ratios.