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Conversion of kitchen waste effluent to H-2-rich syngas via supercritical water gasification: Parameters, process optimization and Ni/Cu catalyst

Large amount of kitchen waste effluent (KWE) was produced during the kitchen waste (KW) treatment. The conventional biological method had the limitation of low hydrolysis rate and long operation time, and the sensitive nature of the microorganisms. In this work, supercritical water gasification was...

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Main Authors: Liu, Jianyong, Fauziah, Shahul Hamid, Zhong, Li, Jiang, Jiahao, Zhu, Gaojun, Yan, Mi
Format: Article
Published: Elsevier 2022
Subjects:
TC Hydraulic engineering. Ocean engineering
TL Motor vehicles. Aeronautics. Astronautics
Online Access:http://eprints.um.edu.my/32730/
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spelling my.um.eprints.327302022-08-18T01:09:30Z http://eprints.um.edu.my/32730/ Conversion of kitchen waste effluent to H-2-rich syngas via supercritical water gasification: Parameters, process optimization and Ni/Cu catalyst Liu, Jianyong Fauziah, Shahul Hamid Zhong, Li Jiang, Jiahao Zhu, Gaojun Yan, Mi TC Hydraulic engineering. Ocean engineering TL Motor vehicles. Aeronautics. Astronautics Large amount of kitchen waste effluent (KWE) was produced during the kitchen waste (KW) treatment. The conventional biological method had the limitation of low hydrolysis rate and long operation time, and the sensitive nature of the microorganisms. In this work, supercritical water gasification was adopted to realize the energy conversion from KWE. The different operation parameters including temperature and residence time were investigated. Furthermore, hydrothermal pretreatment (pre-HT) and Ni/Cu bimetallic catalyst were studied to reduce the energy cost and increase the gasification efficiencies. With the increase of temperature from 360 degrees C to 480 degrees C, the H-2 yield exhibited a significant increase from 150.32 mmol/L to 563.43 mmol/L. Pre-HT significantly accelerated the subsequent SCWG process, and shortened the SCWG reaction time. In addition, Ni/Al2O3 enhanced the reaction rate during SCWG, and the reactions were further accelerated with different Cu loading content. The highest H-2 yield of 727.44 mmol/L was obtained at 10Ni-2.5Cu/gamma Al2O3 in addition due to the improved catalytic performance of Ni by loading Cu and the high activity in water-gas shift reaction during SCWG process. Pre-HT was provided to shorten the SCWG reaction time for energy saving, moreover, appropriate amount of Ni-Cu/Al2O3 catalyst was presented for the reaction acceleration. Findings from this work can pave a promising treatment option for KWE, with energy input saving and gasification efficiencies increasing, making it possible for industrial application of SCWG of KWE. Elsevier 2022-04-15 Article PeerReviewed Liu, Jianyong and Fauziah, Shahul Hamid and Zhong, Li and Jiang, Jiahao and Zhu, Gaojun and Yan, Mi (2022) Conversion of kitchen waste effluent to H-2-rich syngas via supercritical water gasification: Parameters, process optimization and Ni/Cu catalyst. Fuel, 314. ISSN 0016-2361, DOI https://doi.org/10.1016/j.fuel.2021.123042 <https://doi.org/10.1016/j.fuel.2021.123042>. 10.1016/j.fuel.2021.123042
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TC Hydraulic engineering. Ocean engineering
TL Motor vehicles. Aeronautics. Astronautics
spellingShingle TC Hydraulic engineering. Ocean engineering
TL Motor vehicles. Aeronautics. Astronautics
Liu, Jianyong
Fauziah, Shahul Hamid
Zhong, Li
Jiang, Jiahao
Zhu, Gaojun
Yan, Mi
Conversion of kitchen waste effluent to H-2-rich syngas via supercritical water gasification: Parameters, process optimization and Ni/Cu catalyst
description Large amount of kitchen waste effluent (KWE) was produced during the kitchen waste (KW) treatment. The conventional biological method had the limitation of low hydrolysis rate and long operation time, and the sensitive nature of the microorganisms. In this work, supercritical water gasification was adopted to realize the energy conversion from KWE. The different operation parameters including temperature and residence time were investigated. Furthermore, hydrothermal pretreatment (pre-HT) and Ni/Cu bimetallic catalyst were studied to reduce the energy cost and increase the gasification efficiencies. With the increase of temperature from 360 degrees C to 480 degrees C, the H-2 yield exhibited a significant increase from 150.32 mmol/L to 563.43 mmol/L. Pre-HT significantly accelerated the subsequent SCWG process, and shortened the SCWG reaction time. In addition, Ni/Al2O3 enhanced the reaction rate during SCWG, and the reactions were further accelerated with different Cu loading content. The highest H-2 yield of 727.44 mmol/L was obtained at 10Ni-2.5Cu/gamma Al2O3 in addition due to the improved catalytic performance of Ni by loading Cu and the high activity in water-gas shift reaction during SCWG process. Pre-HT was provided to shorten the SCWG reaction time for energy saving, moreover, appropriate amount of Ni-Cu/Al2O3 catalyst was presented for the reaction acceleration. Findings from this work can pave a promising treatment option for KWE, with energy input saving and gasification efficiencies increasing, making it possible for industrial application of SCWG of KWE.
format Article
author Liu, Jianyong
Fauziah, Shahul Hamid
Zhong, Li
Jiang, Jiahao
Zhu, Gaojun
Yan, Mi
author_facet Liu, Jianyong
Fauziah, Shahul Hamid
Zhong, Li
Jiang, Jiahao
Zhu, Gaojun
Yan, Mi
author_sort Liu, Jianyong
title Conversion of kitchen waste effluent to H-2-rich syngas via supercritical water gasification: Parameters, process optimization and Ni/Cu catalyst
title_short Conversion of kitchen waste effluent to H-2-rich syngas via supercritical water gasification: Parameters, process optimization and Ni/Cu catalyst
title_full Conversion of kitchen waste effluent to H-2-rich syngas via supercritical water gasification: Parameters, process optimization and Ni/Cu catalyst
title_fullStr Conversion of kitchen waste effluent to H-2-rich syngas via supercritical water gasification: Parameters, process optimization and Ni/Cu catalyst
title_full_unstemmed Conversion of kitchen waste effluent to H-2-rich syngas via supercritical water gasification: Parameters, process optimization and Ni/Cu catalyst
title_sort conversion of kitchen waste effluent to h-2-rich syngas via supercritical water gasification: parameters, process optimization and ni/cu catalyst
publisher Elsevier
publishDate 2022
url http://eprints.um.edu.my/32730/
_version_ 1744649147484471296
score 13.211869

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