Selective oxidation of cellulose into formic acid over heteropolyacid-based temperature responsive catalysts. (February 2022)

• Record Type: Journal Article
• Authors: Shen, Feng; Li, Ye; Qin, Xiaoya; Guo, Haixin; Li, Jialu; Yang, Jirui; Ding, Yongzhen
• Is Part Of: Renewable energy. Volume 185(2022)
• Page Start: 139
• Page End: 146
• Publication Date: 2022-02
• Subjects: Biomass derived -- Organic acid -- Catalytic oxidation -- Homogeneous catalyst -- Heterogeneous catalyst; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2021.12.043
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: Formic acid (FA) is one of the most promising vectors for sustainable hydrogen energy and it can be synthesized from renewable biomass resources. In this work, a range of heteropolyacid derived temperature-responsive catalysts (Chn H4-n PMo11 VO40, n=1–3) were prepared by modifying H3 PMo12 O40 heteropolyacid with an oxidation site V 5+ and temperature-responsive monomer choline chloride (Ch + ), and used for the cascade conversion of biomass derived cellulose into FA via hydrolysis-oxidation in water. The ChH3 PMo11 VO40 with a Ch/H ratio of 1/3 exhibited an outstanding catalytic performance to give a 49.5% yield of FA at 165 °C after 3 h reaction time. Catalytic activity of Chn H4-n PMo11 VO40 was found to be related to its amount of H + and V 5+, while the recyclable ability of Chn H4-n PMo11 VO40 was found to be related to its amount of Ch + . The as-prepared catalyst could be perfectly recycled with a single decrease the temperature of reaction systems, and be reused four times with limit loss in catalytic activity. The developed temperature-responsive catalysts have both advantages of homogeneous catalyst and heterogeneous catalyst, which should have potential application in other reactions of lignocellulosic biomass valorization. Graphical abstract: Image 1 Highlights (55 words) : Temperature-responsive heteropolyacid was synthesized by modifying choline chloride. A facile cascade conversion of cellulose into formic acid with ChnH4-n PMo11 VO40 . ChH3 PMo11 VO40 yielded 49.5% formic acid from cellulose conversion in water. Catalytic activity binds onto acidity group (H + ) and oxidation group (V 5+ ). Recyclable ability related to temperature-responsive choline chloride (Ch + ) group.