期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
卷号：3
期号：1
页码：8607
出版社：S&S Publications
摘要：This study investigated the chemical modifications of coal fly ash treated with concentrated HClO4. A solidacid catalyst PAFA was synthesized by the chemical treatment which was prepared from Perchloric acid activation.The physico-chemical modifications of PAFA catalyst was investigated by employing various analytical techniquessuch as XRF, XRD, FT-IR, SEM and BET surface area. The Brønsted and Lewis acidity of the catalysts were measuredby pyridine adsorbed FT-IR. The catalytic performance of PAFA catalyst was evaluated for the series of esterificationtreaction viz. esterification of acetic acid and various alcohols (such as ethanol, propanol, n-butanol, isoamyl alcohol,octanol and benzyl alcohol) to give ester, which are an important fine chemical intermediate, widely used inpharmaceutical and as flavoring agent in confectionary. The catalyst was completely recyclable without significant lossin activity up to 4 reaction cycles, which confers its stability during reaction. The work reports an innovative use ofsolid waste fly ash as an effective solid acid catalyst.
关键词：Fly ash; mechanical activation; chemical activation; acid treatment and ball milling
