Experimental study on the energy conversion of food waste via supercritical water gasification: Improvement of hydrogen production

Yan, Mi and Su, Hongcai and Hantoko, Dwi and Kanchanatip, Ekkachai and Hamid, Fauziah Shahul and Zhang, Sicheng and Wang, Guobin and Xu, Zhang (2019) Experimental study on the energy conversion of food waste via supercritical water gasification: Improvement of hydrogen production. International Journal of Hydrogen Energy, 44 (10). pp. 4664-4673. ISSN 0360-3199

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Official URL: https://doi.org/10.1016/j.ijhydene.2018.12.193

Abstract

In this study, the model food waste was gasified to hydrogen-rich syngas in a batch reactor under supercritical water condition. The model food consisted of rice, chicken, cabbage, and cooking oil. The effects of the main operating parameters including temperature (420–500 °C), residence time (20–60 min) and feedstock concentration (2–10 wt%) were investigated. Under the optimal condition at 500 °C, 2 wt% feedstock and 60 min residence time, the highest H 2 yield of 13.34 mol/kg and total gas yield of 28.27 mol/kg were obtained from non-catalytic experiments. In addition, four commercial catalysts namely FeCl 3 , K 2 CO 3 , activated carbon, and KOH were employed to investigate the catalytic effect of additives at the optimal condition. The results showed that the highest hydrogen yield of 20.37 mol/kg with H 2 selectivity of 113.19%, and the total gas yield of 38.36 mol/kg were achieved with 5 wt% KOH addition Moreover, the low heating value of gas products from catalytic experiments with KOH increased by 32.21% compared to the non-catalytic experiment. The catalytic performance of the catalysts can be ranked in descending order as KOH > activated carbon > FeCl 3 > K 2 CO 3 . The supercritical water gasification (SCWG) with KOH addition can be a potential applied technology for food waste treatment with production of hydrogen-rich gases. © 2019 Hydrogen Energy Publications LLC

Item Type: Article
Uncontrolled Keywords: Food waste; Supercritical water; Gasification; Hydrogen; Catalyst
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history
Divisions: Faculty of Science > Institute of Biological Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 27 Nov 2019 08:21
Last Modified: 27 Nov 2019 08:21
URI: http://eprints.um.edu.my/id/eprint/23128

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