Influence of hierarchical ZSM-5 catalysts with various acidity on the dehydration of glycerol to acrolein

The main challenge in the dehydration of glycerol to acrolein lies in overcoming catalyst deactivation and improving the selectivity to acrolein. The relationship between the acidity in the mesoporous channels and catalytic performance of glycerol dehydration is rarely reported. In this work, to investigate the influence of acidity in the mesoporous channels of hierarchical ZSM-5 catalysts on the dehydration of glycerol to acrolein, a series of hierarchical ZSM-5 zeolites with comparable mesoporous volume and mesoporous size but different acid properties in mesopores have been successfully prepared via alkalinetreatment. The sample with the abundant mesoporosity and highest acidity display the best performance. (c) 2021 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY -NC -ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).