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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2011,Vol.27>> Issue(05)>> 1176-1180     doi: 10.3866/PKU.WHXB20110442         中文摘要
CATALYSIS AND SURFACE SCIENCE
Effects of Surface Acidity on the Adsorption Desulfurization of Cu(I)Y Zeolites
WANG Wang-Yin, PAN Ming-Xue, QIN Yu-Cai, WANG Ling-Tao, SONG Li-Juan
Liaoning Key Laboratory of Petrochemical Engineering, Liaoning Shihua University, Fushun 113001, Liaoning Province, P. R. China
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Cu(I)Y zeolites with different degrees of ion exchange were prepared by solid state ion exchange (SSIE) and liquid phase ion exchange (LPIE). The surface acidity of the Cu(I)Y zeolite was characterized by adsorbed pyridine infrared spectroscopy (Py-IR) and the adsorbents desulfurization capabilities were evaluated by a fixed-bed adsorption experiment. We observed that after modification using different ion exchange methods the Cu(I)Y zeolites retained the structure of the Y zeolite completely. The amount of exchanged Cu+ and the surface acidity including the Brönsted (B) acid content and the Lewis (L) acid content greatly affected the adsorption desulfurization process. After SSIE and with an increased degree of ion exchange the B acid gradually transformed to the L acid as a result of an improvement in the adsorption capacity. The results revealed that decreasing B acid content might be the essiential reason for the evidently improved adsorption desulfurization activity for the Cu(I)Y zeolites prepared by different ion exchange methods.



Keywords: Cu(I)Y zeolite   Adsorption desulfurization   Surface acidity   Solid state ion exchange   Adsorbed pyridine infrared spectrum  
Received: 2010-11-03 Accepted: 2011-01-25 Publication Date (Web): 2011-03-22
Corresponding Authors: SONG Li-Juan Email: lsong@lnpu.edu.cn

Fund: The project was supported by the National Natural Science Foundation of China (20776064, 20976077) and National Key Basic Research Program of China (973) (2007CB216403).

Cite this article: WANG Wang-Yin, PAN Ming-Xue, QIN Yu-Cai, WANG Ling-Tao, SONG Li-Juan. Effects of Surface Acidity on the Adsorption Desulfurization of Cu(I)Y Zeolites[J]. Acta Phys. -Chim. Sin., 2011,27 (05): 1176-1180.    doi: 10.3866/PKU.WHXB20110442

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