Insitu FTIR Study of the Acidity and Accessibility over NiY Zeolite

doi:10.3969/j.issn.1006-396X.2014.05.004

Journal of Petrochemical Universities ›› 2014, Vol. 27 ›› Issue (5): 16-19.DOI: 10.3969/j.issn.1006-396X.2014.05.004

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Insitu FTIR Study of the Acidity and Accessibility over NiY Zeolite

(1.Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Province, Liaoning Shihua University, Fushun Liaoning 113001, China; 2.College of Chemistry and Chemical Engineering, China University of Petroleum(East China),Qingdao Shandong 266426, China； 3.Department of Biochemistry, Fushun Normal College, Fushun Liaoning 113006,China

Received:2014-01-12 Revised:2014-06-10 Published:2014-10-25 Online:2014-12-19

原位红外光谱法研究N i Y分子筛的酸性及酸中心可接近性

张晓彤¹, 王琳¹, 秦玉才^{1, 2}, 裴婷婷¹, 张畅¹, 王红³, 宋丽娟^{1, 2*}

( 1. 辽宁石油化工大学辽宁省石油化工催化科学与技术重点实验室,辽宁抚顺1 1 3 0 0 1;
2. 中国石油大学( 华东) 化学化工学院,山东青岛2 6 6 4 2 6; 3. 抚顺师范高等专科学校生化系, 辽宁抚顺1 1 3 0 0 6)

通讯作者: 宋丽娟( 1 9 6 2 - ) , 女, 博士, 教授, 从事新型催化材料及清洁油品生产新工艺研究; E - m a i l : l s o n g 5 6@2 6 3. n e t 。
作者简介:张晓彤( 1 9 7 0 - ) , 男, 博士, 教授, 从事高等仪器分析与计量化学方向研究; E - m a i l : x t . z h a n g@1 2 6. c o m。
基金资助:
国家自然基金项目( 2 0 9 7 6 0 7 7; 2 1 0 7 6 1 0 0) ; 中国石油天然气股份有限公司炼油催化剂重大专项 ( 1 0 - 0 1 A - 0 1 - 0 1 - 0 1) 。

Abstract

Abstract: Acidity and accessibility of LNiY were characterized by in situ FTIR spectroscopy with pyridine (Py), 2,6dimethylpyridine (DTPy) and 2,6ditertbutylpyridine (DTBPy) as the probing molecules, and the texture properties were characterized by N2 adsorption method. The textual property results indicate thatmesoporous defect positions exist in the prepared LNiY zeolites.The in situ FTIR results imply that hydroxyl are strong Brnsted acid in supercages of the LNiY zeolites. The accessibility of the Brnstedacid sites is different, and the ones in the defect positions show the more excellent accessibility. 

Key words: In situ FTIR, , LNiYzeolite, , Accessibility, , Acidicity, , Alkylpyridines

摘要： 以液相离子交换法制备的 N i Y( L - N i Y)分子筛为研究对象, 运用N2 吸附表征其织构性能; 采用原位红外光谱技术以吡啶( P y) 、 2, 6 - 二甲基吡啶( DT P y) 、 2, 6 - 二叔丁基吡啶( DT P y) 为探针分子考察分子筛表面酸性及其超笼桥羟基B酸位的可接近性。结果表明, 经改性后的L - N i Y表面产生了介孔结构的缺陷位; 原位红外光谱结果表明, L - N i Y超笼桥中的桥羟基为强B酸中心, 且这些B酸中心的可接近性存在一定的差异性, 其中位于缺陷位处的B酸位具有较优异的可接近性。

关键词: 原位红外光谱, , , L - N i Y分子筛, , , 可接近性, , , 酸性, , , 烷基吡啶

Zhang Xiaotong, Wang Lin, Qin Yucai,et al. Insitu FTIR Study of the Acidity and Accessibility over NiY Zeolite[J]. Journal of Petrochemical Universities, 2014, 27(5): 16-19.

张晓彤, 王琳, 秦玉才. 原位红外光谱法研究N i Y分子筛的酸性及酸中心可接近性[J]. 石油化工高等学校学报, 2014, 27(5): 16-19.

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Insitu FTIR Study of the Acidity and Accessibility over NiY Zeolite

原位红外光谱法研究N i Y分子筛的酸性及酸中心可接近性

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