用微反装置考察了高温水蒸汽和添加磷、稀土元素 La 对 ZSM-5分子筛改性后在苯和乙烯烷基化反应中的催化性能。试验表明,乙苯的选择性、催化剂的抗结焦性能有明显提高,而苯的转化率下降。考察了苯烷基化产物的选择性、结焦量随反应时间变化的情况,对水蒸汽及添加磷的处理条件进行了讨论。
【英文摘要】
Modification of ZSM-5 with superheated steam,phosphorous compounds andthe rare earth element lanthanum and their effects on the catalytic propertyand resistance to coking have been studied.Remarkable increase in selectivity ofethylbenzene and resistance to coking on the modified ZSM-5,with some decreasein conversion are observed.Rare earth element lanthanum can further improvethe properties of the modified ZSM-5.The effects of condition of pretreatment andreaction time on selectivities and coke formation ha...
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