LAPSE:2023.34997
Published Article
LAPSE:2023.34997
Supercritical Water Gasification of Coconut Shell Impregnated with a Nickel Nanocatalyst: Box−Behnken Design and Process Evaluation
April 28, 2023
The energy conversion of nickel-impregnated coconut shells using supercritical water has not yet been explored. The impregnation process was conducted at room temperature and a pH of 5.80 for 72 h. Characterization of the prepared sample confirmed the presence of nickel nanoparticles with an average size of 7.15 nm. The gasification of control and impregnated samples was performed at 400−500 °C, biomass loading from 20 to 30 wt% and residence time from 20 to 60 min. The response surface methodology (RSM) approach, with a Box−Behnken method, was used to design the experiments. The optimization model showed that the non-catalytic process at 500 °C, 60 min and 20 wt% of biomass loading could promote an H2 yield of 8.8 mol% and gasification efficiency of 47.6%. The gasification of nickel-impregnated coconut shells showed significantly higher gasification efficiency (58.6%) and hydrogen yield (17.2 mol%) with greater carbon and hydrogen efficiencies (109.4 and 116.9%) when compared to the non-catalytic process. The presence of nickel particles in the biomass matrix as nanocatalysts promoted higher hydrogen production and supercritical water gasification efficiency.
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Keywords
coconut shell, efficiency, Hydrogen, nickel, supercritical water gasification
Subject
Suggested Citation
Marcelino MM, Leeke GA, Jiang G, Onwudili JA, Alves CT, Santana DMD, Torres FA, Torres EA, Vieira de Melo SAB. Supercritical Water Gasification of Coconut Shell Impregnated with a Nickel Nanocatalyst: Box−Behnken Design and Process Evaluation. (2023). LAPSE:2023.34997
Author Affiliations
Marcelino MM: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil
Leeke GA: School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
Jiang G: School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
Onwudili JA: Energy & Bioproducts Research Institute, School of Infrastructure & Sustainable Engineering, Aston University, Birmingham B4 7ET, UK [ORCID]
Alves CT: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil; Departamento de Engenharia de Energia, Centro de Ciência e Tecnologia em Energia e Su [ORCID]
Santana DMD: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil; Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federaç [ORCID]
Torres FA: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil; Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federaç [ORCID]
Torres EA: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil; Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federaç
Vieira de Melo SAB: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil; Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federaç [ORCID]
Leeke GA: School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
Jiang G: School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
Onwudili JA: Energy & Bioproducts Research Institute, School of Infrastructure & Sustainable Engineering, Aston University, Birmingham B4 7ET, UK [ORCID]
Alves CT: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil; Departamento de Engenharia de Energia, Centro de Ciência e Tecnologia em Energia e Su [ORCID]
Santana DMD: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil; Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federaç [ORCID]
Torres FA: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil; Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federaç [ORCID]
Torres EA: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil; Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federaç
Vieira de Melo SAB: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil; Centro Interdisciplinar em Energia e Ambiente (CIENAM), Campus Universitário Federaç [ORCID]
Journal Name
Energies
Volume
16
Issue
8
First Page
3563
Year
2023
Publication Date
2023-04-20
Published Version
ISSN
1996-1073
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PII: en16083563, Publication Type: Journal Article
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LAPSE:2023.34997
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doi:10.3390/en16083563
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Apr 28, 2023
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