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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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盐酸溶液和水热脱铝HEU-1分子筛的表征及其催化裂解性能
DOI: 10.1016/S1872-2067(11)60454-3, PP. 1889-1900
Keywords: HEU-1分子筛,脱铝,水热处理,盐酸溶液处理,催化裂解,丙烯
Abstract:
？采用HCl溶液和/或水热处理HEU-1分子筛,利用X射线衍射、N2吸附-脱附、X射线荧光光谱、NH3程序升温脱附、吡啶吸附傅里叶变换红外光谱和铝固体核磁共振等对脱铝处理的HEU-1分子筛进行了表征,并考察了脱铝HEU-1分子筛上正己烷的催化裂解性能.结果表明,采用HCl溶液处理HEU-1分子筛,能有效脱除非骨架铝,可调变样品的弱酸中心;而水热处理HEU-1分子筛,能有效脱除骨架铝,可调变样品的强酸中心.水热处理和HCl溶液处理有效结合可以达到同时调变HEU-1分子筛的酸类型和酸密度的目的.脱铝HEU-1分子筛上正己烷催化裂解反应结果表明,氢转移反应被明显抑制,丙烯选择性提高.600°C水热处理后再用HCl溶液处理的HEU-1分子筛于625°C反应时丙烯选择性由未改性的21.9%提高到35.2%,活性稳定性也由不足10h提高到40h.
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