Fe/HY zeolite as an effective catalyst for levulinic acid production from glucose: Characterization and catalytic performance

• Published in: Applied catalysis. B, Environmental Vol. 163; pp. 487 - 498
• Main Authors: Ramli, Nur Aainaa Syahirah, Amin, Nor Aishah Saidina
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01-02-2015; Elsevier
• Subjects: Acidity; Biomass conversion; Catalysis; Catalysts; Chemistry; Colloidal state and disperse state; Constants; Exact sciences and technology; Fe/HY zeolite catalyst; General and physical chemistry; Glucose; Ion-exchange; Iron; Levulinic acid; Porosity; Porous materials; Surface area; Surface physical chemistry; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Transformations; Zeolites; Zeolites: preparations and properties; Fe/HY zeolite catalyst; Acidity; Porosity; Levulinic acid; Biomass conversion; Catalytic reaction; Biomass; Glucose; Zeolite; Conversion; Characterization; Heterogeneous catalysis; Acids; Catalyst; Environmental protection
• ISSN: 0926-3373; 1873-3883
• DOI: 10.1016/j.apcatb.2014.08.031

•Fe/HY catalysts were characterized and tested for glucose conversion to levulinic acid.•Catalyst acidity and porosity influenced the catalyst activity.•Significant findings were found for 10% Fe/HY catalyst with 62% levulinic acid yield.•The reusability of Fe/HY zeolite catalyst was tested for five successive trials.•Test for leaching indicated low Fe ions in the reaction product.
A series of Fe/HY zeolite catalysts with different FeCl3 weight percent (5, 10 and 15%) on HY zeolite have been synthesized in this study. All the catalysts were characterized by XRD, FESEM, N2 physisorption, FTIR, TGA, NH3-TPD and IR-pyridine. The performance of the Fe/HY catalysts was tested in glucose to levulinic acid transformation. The amount and type of acid sites together with surface area and porosity influenced the catalytic activity. The catalyst with a large surface area, high concentration of active acid sites and appropriate ratio of Brønsted to Lewis acids seemed suitable for levulinic acid production. However, catalyst with excess Lewis acidity converted glucose into humins, but samples with high relative mesopority and low relative microporosity gave a decent levulinic acid yield. Among the catalysts tested, 10% Fe/HY catalyst exhibited the highest catalytic performance with 62% yield at 180°C in 180min. The reused catalyst exhibited constant activity for five successive runs. The experimental results demonstrated the potential of Fe/HY catalyst for biomass conversion to levulinic acid under mild process conditions.