Low-temperature hydrothermal liquefaction of pomelo peel for production of 5-hydroxymethylfurfural-rich bio-oil using ionic liquid loaded ZSM-5

• Published in: Bioresource technology Vol. 352; p. 127050
• Main Authors: Wei, Yingyuan, Fakudze, Sandile, Zhang, Yu, Song, Min, Xue, Tianjiao, Xie, Ruiyan, Chen, Jianqiang
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.05.2022
• Subjects: 5-Hydroxymethylfurfural; Bio-oil; Biofuels; Biomass; Catalytic hydrothermal liquefaction; Furaldehyde - analogs & derivatives; Ionic Liquids; Plant Oils; Polyphenols; Pomelo peel; Temperature; Water; Zeolite; Ionic liquids; Zeolite; 5-Hydroxymethylfurfural; Pomelo peel; Catalytic hydrothermal liquefaction; Bio-oil
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2022.127050

[Display omitted] •Ionic liquid loaded ZSM-5 shows good stability and catalytic performance.•Catalytic HTL led to 29.21 wt% bio-oil including 50.1% 5-HMF and 19.89% 3-Pyridinol.•Catalytic H+ generated from ion-exchange between [AMIm]+ and ZSM-5 acidic sites.•19.68 wt% bio-oil with 59.6% of light oil yielded after 5 cycles of catalyst reuse. Ionic liquid loaded ZSM-5 with high stability and catalytic performance was used for hydrothermal liquefaction (HTL) of pomelo peel for the first time. Bio-oil obtained at 200 °C had the highest yield (29.21 wt%) and high heating value (21.41 MJ/kg), with main constituents of 5-hydroxymethylfurfural (5-HMF, 50.10%), 3-Pyridinol (19.8%) and pentanoic acid (5.35%). The higher 5-hydroxymethylfurfural yield obtained using ionic liquid loaded ZSM-5 was further compared to other studies (0–50%). In comparison to high-temperature HTL, catalytic HTL with ionic liquid loaded ZSM-5 led to lower activation energy requirements (31.93 kJ·mol−1) for the conversion of glucose into 5-HMF. Additionally, the catalysts showed excellent recyclability, with 19.68 wt% of bio-oil containing 59.6% of light oil obtained after 5 cycles. Hence, this study presents a novel approach for the catalytic conversion of lignocellulosic biomass into 5-HMF-rich bio-oil for energy and green chemistry applications.