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Dispersion measurement of heteropoly acid supported on KIT-1 mesoporous material

✍ Scribed by Wang-Gi Kim; Myung-Wan Kim; Jong-Ho Kim; Gon Seo

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
179 KB
Volume
57
Category
Article
ISSN
1387-1811

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✦ Synopsis

Heteropoly acid (HPA) catalysts supported on KIT-1 mesoporous material were prepared with different loadings and characterized using XRD, UV-VIS and N 2 adsorption. Supported HPA was dispersed mainly on the inner surface of pores, resulting in the disappearance of XRD peaks. The diffraction peaks of HPA from the KIT-1 mesoporous material loaded with HPA of 41 wt% was very weak compared to those of physical mixtures of HPA and mesoporous material. The remaining adsorption amount of 1-butene on the supported HPA catalysts revealed the exposed amount of HPA molecules, which is useful in determining the HPA dispersion. HPA dispersion of supported HPA catalysts was useful to interpret their catalytic activity in the skeletal isomerization of 1-butene.

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Friedel–Crafts benzylation of aromatics
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✍ Gunda Kamalakar; Kenichi Komura; Yoshihiro Kubota; Yoshihiro Sugi πŸ“‚ Article πŸ“… 2006 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 228 KB

## Abstract Heteropoly acids (HPA), such as tungstophosphoric acid (H~3~PW~12~O~40~ Β· __x__H~2~O) (HPW), molybdophosphoric acid (H~3~PMo~12~O~40~ Β· __x__H~2~O) (HPMo) and tungstosilicic acid (H~4~SiW~12~O~40~ Β· __x__H~2~O) (HSiW) were supported on mesoporous silica such as MCM‐41, FSM‐16 and SBA‐15