| 张玲,王海彦,王钰佳.DEA-H2O体系中SAPO分子筛选择性转化[J].分子催化,2016,30(3):253-259 |
| DEA-H2O体系中SAPO分子筛选择性转化 |
| Selectivity Transformation of SAPO zeolites in the DEA-H2O System |
| 投稿时间：2015-12-04 修订日期：2016-04-01 |
| DOI： |
| 中文关键词: SAPO-5 SAPO-34 水热合成 陈化 硅铝比 |
| 英文关键词:SAPO-5 SAPO-34 Crystallization time Aging Si/Al |
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| 中文摘要: |
| 本文介绍了以二乙胺（DEA）为模板剂, 水热合成法合成了SAPO分子筛。采用XRD, SEM, FT-IR, NMR等表征手段系统考察了各种合成条件对SAPO-5和SAPO-34分子筛合成的影响。结果表明, 通过调节水热合成条件, SAPO-5和SAPO-34可以选择性的形成。DEA加入量、硅含量、陈化时间、晶化时间及Si/Al对产品的结晶度及晶相组成影响较大。较长的晶化时间以及较高的Si/Al有利于合成纯SAPO-34分子筛。相反, 较易形成SAPO-5分子筛AFI结构。 |
| 英文摘要: |
| SAPO molecular sieves were synthesized using hydrothermal method and diethylamine (DEA) as the template in this article. The products had been investigated by XRD, SEM, FT-IR, and NMR spectros-copy, which clearly revealed that SAPO-5 and SAPO-34 molecular sieves are phase-selectively ob-tained via adjusting the synthesis parameters. The results show that, the crystallinity and phases of products were affected by the dosage of DEA and silicon, the time of aging, crystallization time and Si/Al. The results indicate that longer crystallization time and higher Si/Al are favorable conditions for SAPO-34. On the contrary, it will form the SAPO-5 zeolites（AFI）. |
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