Effect of Nickel Nanocatalyst Loading on Supercritical Water Gasification of Coconut Shell

Marcela M. Marcelino, Gary A. Leeke, Guozhan Jiang, Jude A. Onwudili (), Carine T. Alves, Ana Luiza F. de Sousa, Delano M. de Santana, Felipe A. Torres, Silvio A. B. Vieira de Melo and Ednildo A. Torres
Additional contact information
Marcela M. Marcelino: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil
Gary A. Leeke: School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
Guozhan Jiang: School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
Jude A. Onwudili: Energy & Bioproducts Research Institute, School of Infrastructure & Sustainable Engineering, Aston University, Birmingham B4 7ET, UK
Carine T. Alves: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil
Ana Luiza F. de Sousa: Departamento de Engenharia Química, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil
Delano M. de Santana: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil
Felipe A. Torres: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil
Silvio A. B. Vieira de Melo: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil
Ednildo A. Torres: Programa de Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Prof. Aristides Novis, 2, 6° Andar, Federação, Salvador 40210-630, Brazil

Energies, 2024, vol. 17, issue 4, 1-26

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 H 2 and CO 2 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 Ni 0 nanoparticles, leading to higher H 2 . 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.

Keywords: coconut shell; supercritical water gasification; nickel loading (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/17/4/872/pdf (application/pdf)
https://www.mdpi.com/1996-1073/17/4/872/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:17:y:2024:i:4:p:872-:d:1338296

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().