黄艳梅,陆文宇,顾宇飞,赵婷,刘菲菲,李志霞

• 1:广西大学化学化工学院

摘要(Abstract)：

乙烯、丙烯等低碳烯烃是至关重要的化工原料，从废弃聚乙烯中再生这些低碳烯烃对于实现塑料循环具有重要意义。本研究以尿素和四丙基氢氧化铵(TPAOH)作为结构导向剂合成了一系列短b轴ZSM-5分子筛，旨在减少扩散限制，提高塑料催化裂解制低碳烯烃选择性。研究了尿素添加量、硅铝比对b轴厚度的影响，并进一步对高密度聚乙烯进行催化裂解研究。实验结果表明，通过调控尿素的添加量，可以获得b轴厚度为197～668 nm的片状ZSM-5分子筛，实现了对分子筛b轴厚度的调控，其中硅铝比为50,n(TPAOH/SiO_2)=0.34、n(Urea/SiO_2)=1.0的短b轴Z5-50-1.0U分子筛在反应中表现出较好的低碳烯烃选择性，获得的液体和气体产率分别为20.4%和78.4%，其中，苯系物（BTEX）和低碳烯烃选择性分别为69.8%和56.8%。

关键词(KeyWords)： 尿素;短b轴;ZSM-5;催化裂解;低碳烯烃

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(22078076,22468011);; 广西自然科学基金(2025GXNSFAA069239)

作者(Author): 黄艳梅,陆文宇,顾宇飞,赵婷,刘菲菲,李志霞

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