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Isomerization of linear C5–C7 over Pt loaded on protonated fibrous silica@Y zeolite (Pt/HSi@Y)

Triwahyono, Sugeng and A. Jalil, A. and Izan, S. M. and Jamari, N. S. and A. Fatah, N. A. (2019) Isomerization of linear C5–C7 over Pt loaded on protonated fibrous silica@Y zeolite (Pt/HSi@Y). Journal of Energy Chemistry, 37 . pp. 163-171. ISSN 2095-4956


Official URL: http://dx.doi.org/10.1016/j.jechem.2019.02.016


A novel fibrous silica Y zeolite (HSi@Y) loaded with Pt has been studied based on its ability to produce protonic acid sites originating from molecular hydrogen. The Pt/HSi@Y was prepared using seed assisted crystallization followed by protonation and Pt-loading. The product formed had a spherical morphology with bicontinuous lamellar with a diameter in the range of 500–700 nm. The catalytic activity of the Pt/HSi@Y has been assessed based on light linear alkane (C5–C7) isomerization in a micro-catalytic pulse reactor at 423–623 K. A pyridine IR study confirmed that the introduction of fibrous silica on Y zeolite increased the Lewis acid sites corresponding with the formation of extra-framework Al which led to the generation of more protonic acid sites. A hydrogen adsorbed IR study showed that the protonic acid sites which act as active sites in the isomerization were formed via dissociative-adsorption of molecular hydrogen releasing electrons to the nearby Lewis acid sites. Thus, it is suggested that the presence of Pt and HSi@Y with a high number of Lewis acid as well as weak Bronsted acid sites improved the activity and stability in C5, C6 and C7 isomerization via hydrogen spill-over mechanism.

Item Type:Article
Uncontrolled Keywords:acidic sites, C5-C7 isomerization, fibrous silica
Subjects:Q Science > Q Science (General)
ID Code:87921
Deposited By: Yanti Mohd Shah
Deposited On:30 Nov 2020 21:40
Last Modified:30 Nov 2020 21:40

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