Cooperativity of Brønsted and Lewis Acid Sites on Zeolite for Glycerol Dehydration

• DOI: 10.1021/cs401225k
• Publication Date: 2014-02-27T15:49:27Z
• Authors: Zichun Wang; Leizhi Wang; Yijiao Jiang; Michael Hunger; Jun Huang
• Keywords: Acrolein; Brønsted–Lowry acid–base theory; Dihydroxyacetone

Selective dehydration of glycerol, a byproduct from the biodiesel industry, on solid acids is an important reaction in production value-added chemical acrolein for economic-sustainable biorefinery. Most efforts have been made development strong Brønsted acid sites (BAS) to improve acrolein, because Lewis (LAS) generally promote generation acetol. However, exclusively tuning properties BAS or LAS did not well-promote glycerol as indicated this work. We provide new route efficient and selective transformation via cooperative between LAS. The role (extra-framework aluminum species zeolites) was altered competition with generate acetol cooperation neighboring BAS. It very beneficial sequential two-step internal terminal hydroxyl groups acrolein. This cooperativity significantly improved yield dehydration.