高玥,黄星亮,字琴,彭文宇,张鑫,田洪锋,刘宗俨,董乐

• 1:中国石油大学(北京)化学工程学院

摘要(Abstract)：

为了进一步提高ZSM-5分子筛的烷基化性能,采用氢氧化钠(NaOH)-四丙基氢氧化铵(TPAOH)混合碱处理HZSM-5沸石分子筛,固定氢氧化钠和四丙基氢氧化铵量比n(NaOH)/n(TPAOH)=0.6不变,考察混合碱体系中OH-总量(即总碱量)对ZSM-5催化剂应用于苯-甲醇烷基化反应的性能的影响。结果表明,当处理的碱量浓度较低时,NaOH-TPAOH混合碱液不会破坏ZSM-5的骨架结构,且晶体表面会变得更光滑,同时出现一定量的介孔。随碱处理OH~-总量的升高,催化剂的弱酸量增加,强酸强度逐渐下降。对于苯-甲醇烷基化反应,处理总碱量为6.4 mmol时,在液体积空速为85 h~(-1)条件下,运转10 h,苯转化率高达48%,积炭量相对较低,具有很好的稳定性。

关键词(KeyWords)： 混合碱处理;ZSM-5分子筛;烷基化;稳定性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(21576288)

作者(Author): 高玥,黄星亮,字琴,彭文宇,张鑫,田洪锋,刘宗俨,董乐

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