Catalytic conversion of ethyl alcohol on polyaniline protonated with 12-tungstosilicic acid

Catalytic performance of Brønsted acid s

Catalytic performance of Brønsted acid sites during esterification of acetic acid with ethyl alcohol over phosphotungestic acid supported on silica

✍ Abd El-Aziz A Said; Mohamed M M Abd El-Wahab; Alian Mohamed Alian 📂 Article 📅 2007 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 246 KB

## Abstract Different ratios of phosphotungestic acid supported on silica gel were prepared by an impregnation method with PWA loadings ranging from 1 to 30% w/w and calcined at 350 and 500 °C for 4 h in a static air atmosphere. The catalysts were characterized by thermogravimety (TG), differential