OALib Journal期刊
ISSN: 2333-9721
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多级孔ZSM-5分子筛的合成及其在甲醇脱水制二甲醚反应中的应用
DOI: 10.1016/S1872-2067(12)60621-4, PP. 1576-1582
Keywords: 多级孔,HZSM-5分子筛,表面酸性,甲醇脱水,二甲醚
Abstract:
?以四丙基氨为微孔模版剂,阳离子高分子聚合物为介孔模版剂,合成了具有多级介孔的ZSM-5分子筛,并用于甲醇气相脱水合成二甲醚.结果表明,加入阳离子高分子聚合物后,合成的HZSM-5分子筛样品既保持了其MFI典型结构,又呈现了多级介孔特征;随着阳离子高分子聚合物模板剂加入量的增加,其多级介孔特征更为明显.具有多级介孔的HZSM-5分子筛表现出比常规微孔HZSM-5分子筛高的反应稳定性和二甲醚选择性,这主要是由于其织构和酸性的双重作用.
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