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.
类型: 期刊论文
作者: S.Triwahyono,A.A.Jalil,S.M.Izan,N.S.Jamari,N.A.A.Fatah
来源: Journal of Energy Chemistry 2019年10期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 燃料化工,石油天然气工业
单位: Faculty of Science, Universiti Teknologi Malaysia,School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia,Centre of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia
基金: supported by the Universiti Teknologi Malaysia through Research University Grant No. 13H61 and 19H04
分类号: TE624.81
页码: 163-171
总页数: 9
文件大小: 3074K
下载量: 7
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