Marcelino, Marcela M., Leeke, Gary A., Jiang, Guozhan, Onwudili, Jude A., Alves, Carine Tondo, de Sousa, Ana Luiza F., de Santana, Delano M., Torres, Felipe A., Vieira de Melo, Silvio A. B. and Torres, Ednildo A. (2024). Effect of Nickel Nanocatalyst Loading on Supercritical Water Gasification of Coconut Shell. Energies, 17 (4),
Abstract
Impregnation of metal catalysts into biomass before thermochemical conversion may provide benefits of increased selective reactivity to obtain desirable products. In this work, coconut shells impregnated with increasing loadings of nickel were successfully prepared using a room-temperature impregnation method using a nickel salt solution at 1 and 2 molar (M) concentrations. The physicochemical characterization of the 2 M impregnated sample revealed the presence of 5.6 wt% of nickel with a particle size of 13.5 nm. The nickel-impregnated samples’ supercritical water gasification (SCWG) was conducted with biomass loading ranging from 20 wt% to 30 wt%, at temperatures between 400 °C and 500 °C, and residence times from 20 to 60 min. Higher nickel loading, higher temperatures and longer reaction times promoted the production of H2 and CO2 up to 15 and 79 mol%. Higher nickel loading also led to an increased Hydrogen Gasification Efficiency value of up to 133%. The analysis of hydrochars suggested that increasing nickel loading enhanced the reduction in nickel ions to the Ni0 nanoparticles, leading to higher H2. Additionally, the chemical composition of the liquid product showed the significant ability of nickel to promote lignin decomposition into phenol, facilitating the phenol hydrogenation reaction and subsequent gas production.
Publication DOI: | https://doi.org/10.3390/en17040872 |
---|---|
Divisions: | College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry Aston University (General) |
Funding Information: | This study was partly financially supported by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Finance Code 001 (CAPES, Brazil) and Fundação de Amparo à Pesquisa do Estado da Bahia (FAPESB, Brazil), INCITERE Project, PIE008/22. The Aston Univ |
Additional Information: | Copyright © 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
Uncontrolled Keywords: | coconut shell,supercritical water gasification,nickel loading |
Publication ISSN: | 1996-1073 |
Data Access Statement: | The authors confirm that the data supporting the findings of this study are available within the article. |
Last Modified: | 02 Dec 2024 09:04 |
Date Deposited: | 19 Feb 2024 18:13 |
Full Text Link: | |
Related URLs: |
https://www.mdp ... 6-1073/17/4/872
(Publisher URL) http://www.scop ... tnerID=8YFLogxK (Scopus URL) |
PURE Output Type: | Article |
Published Date: | 2024-02-13 |
Published Online Date: | 2024-02-13 |
Accepted Date: | 2024-02-09 |
Authors: |
Marcelino, Marcela M.
Leeke, Gary A. Jiang, Guozhan Onwudili, Jude A. ( 0000-0002-5355-9970) Alves, Carine Tondo de Sousa, Ana Luiza F. de Santana, Delano M. Torres, Felipe A. Vieira de Melo, Silvio A. B. Torres, Ednildo A. |