A numerical investigation of CO2 gasification of biomass particles - analysis of energy, exergy and entropy generation

Wang, L., Izaharuddin, A. N., Karimi, N. and Paul, M. (2021) A numerical investigation of CO2 gasification of biomass particles - analysis of energy, exergy and entropy generation. Energy, 228, 120615. (doi: 10.1016/j.energy.2021.120615)

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Abstract

Much attention has been recently paid to biomass CO2 gasification as a means of CO2 utilisation and mitigation. In this study, a novel low-cost theoretical tool based on thermodynamic equilibrium, and a computational fluid dynamics model are developed to analyse gasification of biomass particles in a CO2 atmosphere. It is shown that increases in C/CO2 enhances the production of hydrogen and results in improving energy and exergy efficiencies of the process. In keeping with that reported for air gasification, increasing the moisture content of biomass intensifies hydrogen production and reduces the yield of CO. The effects of particle temperature on the gasification process are further explored through a spatiotemporal analysis of the gaseous chemical species. In particular, the results reveal that higher initial temperatures of biomass at the entrance of the reactor lead to stronger generation of chemical entropy. Also, the time trace of entropy generation is found to be affected significantly by the initial temperature of the biomass particle. Importantly, the relation between the particle temperature and total entropy generation is observed to be highly nonlinear. Further, it is found that the irreversibility of chemical reactions is the most significant contributor to the total entropy generation in the process.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Paul, Professor Manosh and Wang, Dr Linwei and Karimi, Dr Nader and Izaharuddin, AINUL NADIRAH
Creator Roles:
Wang, L.Conceptualization, Methodology, Software, Validation, Investigation, Writing – original draft, Writing – review and editing
Izaharuddin, A. N.Methodology, Software
Karimi, N.Supervision, Writing – review and editing
Paul, M. C.Supervision, Writing – review and editing, Project administration, Funding acquisition
Authors: Wang, L., Izaharuddin, A. N., Karimi, N., and Paul, M.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Energy
Publisher:Elsevier
ISSN:0360-5442
ISSN (Online):1873-6785
Published Online:12 April 2021
Copyright Holders:Copyright © 2021 Elsevier Ltd.
First Published:First published in Energy 228:120615
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
301784Next Generation Advanced Gasification TechnologyManosh PaulRoyal Academy of Engineering (RAE)LTSRF1718\14\45ENG - Systems Power & Energy