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Molecular hydrogen-originated protonic acid site on Pt/WO3-ZrO2

Triwahyono, Sugeng and Nur, Hadi and Abdul Jalil, Aishah and Mohd. Muhid, Mohd. Nazlan and Shamsudin, Mustaffa and Hamdan, Halimaton and Hattori, Hideshi (2004) Molecular hydrogen-originated protonic acid site on Pt/WO3-ZrO2. In: Annual Fundamental Science Seminar 2004 (AFSS 2004), 14-15 June 2004, Ibnu Sina Institute for Fundamental Science Studies,UTM.

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Abstract

Pt/WO3-ZrO2 catalyst exhibits high activity and selectivity in alkane skeletal isomerization which is an important reaction for a gasoline of high quality. The catalytic activity and selectivity were enhanced in the presence of hydrogen. The roles of hydrogen present in the reaction mixture were studied by kinetic analysis of hydrogen adsorption and IR study of the acid sites. The active sites on Pt/WO3-ZrO2 are interpreted in terms of a concept of acid site generation “molecular hydrogen-originated protonic acid site�. The catalytic features of Pt/WO3-ZrO2 in comparison to those of Pt/SO4-ZrO2 are high selectivity for isomerization against cracking. The features arise from a fast surface diffusion of spiltover hydrogen atoms which convert into protons and hydrides at Lewis acid sites. A high availability of protons and hydrides causes high activity and selectivity for alkane isomerization.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Hydrogen adsorption, protonic acid site, Pt/WO3-ZrO2
Subjects:T Technology > T Technology (General)
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:6333
Deposited By: Norhani Jusoh
Deposited On:26 Sep 2008 09:54
Last Modified:01 Jun 2010 15:41

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