Study on the Reaction Process of Catalytic Conversion of Acetic Acid by ZSM-5
ZHANG Lingling, TONG Mingliang, JIANG Binbo
Zhejiang Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
Abstract：The conversion of fatty acids on zeolite catalysts holds significant potential in the upgrading of bio-oil to fuels. Focusing on acetic acid, a small-molecule compound abundant in bio-oil, the study investigated the effects of key parameters including Si/Al ratio, reaction temperature, space time, partial pressure of acetic acid, and water-to-acid ratio on its catalytic conversion, elucidating the catalytic pathway. Results demonstrated that acetic acid first undergoes decarboxylative ketonization to form acetone, which rapidly isomerizes to isobutylene and subsequently converts into hydrocarbon products dominated by ethylene, propylene, C4, and mixed aromatics. When the reaction temperature exceeds 400 ℃, increasing space-time and acid partial pressure enhances acid-to-hydrocarbon conversion, while water inhibits acetic acid conversion on zeolites but improves catalytic stability. Based on this pathway, a two-step acetic acid conversion process was developed. Further evaluation revealed that this two-step approach effectively improved the catalytic stability of zeolites and the conversion activity of acetic acid. These findings provide novel insights for upgrading small-molecule oxygenated compounds derived from biomass.
ZHANG Lingling,TONG Mingliang,JIANG Binbo. Study on the Reaction Process of Catalytic Conversion of Acetic Acid by ZSM-5[J]. Chemical Reaction Engineering and Technology, 2026, 42(3): 210-218.
