| 模板剂四乙基氢氧化铵的用量对合成的β沸石结构及脱胺的影响 |
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| 引用本文： | 谢在库,陈庆龄,张成芳,陈波,陆丽元. 模板剂四乙基氢氧化铵的用量对合成的β沸石结构及脱胺的影响[J]. 化学物理学报(中文版), 2000, 13(1): 89-94. DOI: 10.1088/1674-0068/13/1/89-94 |
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| 作者姓名： | 谢在库 陈庆龄 张成芳 陈波 陆丽元 |
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| 作者单位： | 华东理工大学化工工艺研究所 上海 200237;上海石油化工研究院 上海 201208 |
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| 摘 要： | 研究四乙基氢氧化铵（TEA-OH）模板剂用量对合成的β沸石的结构及脱胺行为的影响。合成β沸石的模板剂的较佳用量(TEA+/Al)为2.10～1.68,合成的β沸石的相对结晶度均大于84%;β沸石中的铝含量(Al/Al+Si)及骨架铝含量(TdAl/TdAl+OhAl)随晶化混合液的TEA+/Al而变,存在最佳TEA+/Al点为1.9,此时合成的β沸石非骨架铝量最少,结构硅铝比最高;含TEA的β沸石脱胺过程为Hofmann降解反应,TGA测定的失重量、DSC测定的吸热量与β沸石中TEA含量密切相关.
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| 关 键 词： | β沸石 TEA-OH模板剂 结构 脱胺 Hofmann降解反应 |
Influence of the Concentration of Tetraethylammonium Hydroxide as Template on Structure and Thermal Decomposition of as-Synthesized Beta Zeolite |
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| Xie Zaiku,CHEN Qingling,Zhang Chengfang,Cheng Bo,Lu Liyuan. Influence of the Concentration of Tetraethylammonium Hydroxide as Template on Structure and Thermal Decomposition of as-Synthesized Beta Zeolite[J]. Chinese Journal of Chemical Physics, 2000, 13(1): 89-94. DOI: 10.1088/1674-0068/13/1/89-94 |
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| Authors: | Xie Zaiku CHEN Qingling Zhang Chengfang Cheng Bo Lu Liyuan |
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| Abstract: | Effects of the concentration of tetraethylammonium hydroxide(TEA-OH)in gel on the structure and the thermal decomposition of as-synthesized zeolite Beta have been explored.Under synthetic conditions of this study,the optimum concentration of TEA-OH(TEA+/Al)is from 2.10 to 1.68,the relative crystallinity of synthetic β-zeolite is over 84%.The relationship between aluminium content(Al/Al+Si)or framework aluminum content(TdAl/TdAl+OhAl) in β-zeolite and TEA+/Al ratio in gel,has an optimum point.At the optimum point of TEA+/Al in gel with 1.9,Beta zeolite with a lower non-framework aluminium(OhAl) content and a higher framework Si/Al ratio can be obtained.The thermal decomposition of as-synthesized Beta zeolite is Hofmann degradation,and the weight-loss by TGA,the total endotherm by DSC are closely related to the TEA content in as-synthesized Beta zeolite. |
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| Keywords: | TEA-OH template Zeolite structure TEA decomposition Hofmann degradation |
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