Role of Brønsted acid in selective production of furfural in biomass pyrolysis.

Haiyan Zhang, Xuejun Liu, Meizhen Lu, Xinyue Hu, Leigang Lu, Xiaoning Tian, Jianbing Ji

Journal: Bioresource technology 2015;169():800-803

PMID: 25106779

Full Text on Elsevier Science View on PubMed

Abstract

In this work, the role of Brønsted acid for furfural production in biomass pyrolysis on supported sulfates catalysts was investigated. The introduction of Brønsted acid was shown to improve the degradation of polysaccharides to intermediates for furfural, which did not work well when only Lewis acids were used in the process. Experimental results showed that CuSO4/HZSM-5 catalyst exhibited the best performance for furfural (28% yield), which was much higher than individual HZSM-5 (5%) and CuSO4 (6%). The optimum reaction conditions called for the mass ratio of CuSO4/HZSM-5 to be 0.4 and the catalyst/biomass mass ratio to be 0.5. The recycled catalyst exhibited low productivity (9%). Analysis of the catalysts by Py-IR revealed that the CuSO4/HZSM-5 owned a stronger Brønsted acid intensity than HZSM-5 or the recycled CuSO4/HZSM-5. Therefore, the existence of Brønsted acid is necessary to achieve a more productive degradation of biomass for furfural.

Address: Zhejiang Province Key Laboratory of Biofuel, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China.; School of Chemical Engineering, Ningbo University of Technology, Ningbo 315016, PR China.; Zhejiang Province Key Laboratory of Biofuel, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China. Electronic address: [email protected].

DOI: 10.1016/j.biortech.2014.07.053

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MeSH Terms: Acids, Biomass, Biotechnology, Catalysis, Copper Sulfate, Furaldehyde, Hot Temperature, Phosphoric Acids, Sulfuric Acids, Zeolites