Direct synthesis of allyl alcohol from glycerol over CoFe alloy

• Published in: Applied catalysis. B, Environmental Environmental, 2020-11, Vol.277, p.119187, Article 119187
• Main Authors: Zhao, Huaiyuan, Jiang, Yuanyuan, Liu, Haolan, Long, Yihua, Wang, Zhengbao, Hou, Zhaoyin
• Format: Article
• Language: English
• Subjects: Acidity; Alcohol; Alcohols; Allyl alcohol; Catalysts; CoFe alloy; CoFe-ZIF; Glycerol; Growth industries; Hydrogenolysis; Intermetallic compounds; Reaction mechanisms; Selectivity; Synergistic effect
• ISSN: 0926-3373; 1873-3883
• DOI: 10.1016/j.apcatb.2020.119187

A bimetallic CoFe-ZIF derived CoFe alloy was extremely active and selective formation of ally alcohol directly from glycerol. [Display omitted] •Allyl alcohol formed directly via the simultaneously dehydration + hydrogenation of glycerol on CoFe.•Co can improve the activation of hydrogen and Fe enhances the acidity of prepared CoFe alloy.•Activated H and acid sites played a synergistic role for the formation of allyl alcohol.•The reaction mechanism was proposed on the basis of several controlled experiments. Allyl alcohol is a pivotal intermediate and it is of great importance to find a new way for the selective production of allyl alcohol from renewable and surplus glycerol. In this work, we want to report the high performance of CoFe alloy for the direct synthesis of allyl alcohol from glycerol. This alloy catalyst was prepared via the controlled calcination and reduction of CoFe-ZIF precursor. Characterization results indicate that Co can improve the activation of hydrogen and Fe enhances the acidity of prepared CoFe alloy. The activated hydrogen and acid sites in CoFe alloy played a synergistic effect for the selective formation of allyl alcohol directly from glycerol. The selectivity of allyl alcohol remained higher than 68.7 % with a 89.7 % conversion of glycerol at 250 °C, 2 MPa and WHSV = 2.6 h−1. And the reaction mechanism over CoFe alloy was proposed on the basis of controlled experiments.