| 杂原子硼对Y型分子筛性能的影响 |
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| 引用本文： | 赵俊桥,沈志虹,鞠雅娜,朱俊哲. 杂原子硼对Y型分子筛性能的影响[J]. 石油化工, 2005, 34(7): 648-651 |
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| 作者姓名： | 赵俊桥 沈志虹 鞠雅娜 朱俊哲 |
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| 作者单位： | 中国石油大学(北京)化工学院中国石油天然气集团公司催化重点实验室,北京,102249 |
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| 摘 要： | 利用X射线粉末衍射、差示扫描量热、NH3吸附-程序升温脱附、吡啶吸附红外光谱等方法考察了硼原子进入Y型分子筛骨架后对分子筛的晶型、晶胞参数、热稳定性、水热稳定性以及表面酸性的影响。实验结果表明,由于硼原子进入Y型分子筛的骨架,使其晶胞收缩,但不影响分子筛的晶型,分子筛的结晶度随硼加入量的增加而先增大后减小;分子筛的热稳定性及水热稳定性有所下降;分子筛表面的酸性质发生变化,其中B酸中心数量明显增加。
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| 关 键 词： | 杂原子 硼 Y型分子筛 结晶度 水热稳定性 表面酸性 |
| 文章编号： | 1000-8144(2005)07-0648-04 |
| 修稿时间： | 2005-01-19 |
Effect of Hetero - Atom B on the Performances of Y Molecular Sieves |
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| Zhao Junqiao,Shen Zhihong,Ju Ya'na,Zhu Junzhe. Effect of Hetero - Atom B on the Performances of Y Molecular Sieves[J]. Petrochemical Technology, 2005, 34(7): 648-651 |
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| Authors: | Zhao Junqiao Shen Zhihong Ju Ya'na Zhu Junzhe |
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| Abstract: | BY molecular sieves was synthesized in process of hydrothermal synthesis of Y molecular sieves.The changes brought about to Y molecular sieves,after entering of B into crystalline framework of it,was characterized by XRD,DSC,NH_3-adsorption and pyridine-IR methods.The entering of B did not change the crystalline form,but caused the contraction of crystal cell parameter.The crystallinity of Y molecular sieves increased along with the B content,approached to a maximum then fell.The heat stability and hydrothermal stability of BY molecular sieves decreased.The surface acidity changed,especially those of the strong Bronsted acid sites obviously increased. |
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| Keywords: | hetero-atom boron Y molecular sieves crystallinity hydrothermal stability surface acidity |
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