- Title
- Effect of reactant types (steam, CO2 and steam + CO2) on the gasification performance of coal using entrained flow gasifier
- Creator
- Shahabuddin, M.; Bhattacharya, Sankar
- Date
- 2021
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/179105
- Identifier
- vital:15517
- Identifier
-
https://doi.org/10.1002/er.6475
- Identifier
- ISBN:0363-907X (ISSN)
- Abstract
- This study investigates the gasification behaviour of bituminous coal using different reactants of CO2, steam and a mixture of CO2 and steam under entrained flow gasification conditions at temperatures of 1000°C and 1200°C with atmospheric pressure. The major gas constituents of the syngas were measured using online micro-GC with a model number Varian 490, whereas the minor pollutant gases were analysed using Kitagawa gas detection tubes. A maximum carbon conversion of 86% was achieved under steam gasification at a temperature of 1200°C compared to 74% from CO2 gasification. The higher carbon conversion from steam gasification is due to the higher gasification reactivity than CO2 gasification. At 1000°C, the lower heating value (LHV) from steam gasification was determined to be 60%, 70% and 80% higher than that of CO2 gasification using the reactant concentrations of 10, 20 and 40 vol.%, respectively. Using a stoichiometric 50/50 ratio of CO2 and steam, the yield of H2, CO and CH4 were increased by 56%, 106% and 35% compared to that of pure CO2 gasification. At 1000°C, the LHV under mixed reactant condition is close to the LHV from the pure steam gasification at 1200°C. In steam gasification, increasing the temperature by 200°C from 1000°C decreases the LHV by 17 and 10% using 10 and 20 vol.% steam. The higher heating value from steam gasification is due to the H2 and CH4-rich syngas compared to CO-rich syngas in CO2 gasification. The BET surface area of the solid char from steam gasification is about 17 and two times higher than that of CO2 gasification at 1000°C and 1200°C, respectively. © 2021 John Wiley & Sons Ltd
- Publisher
- John Wiley and Sons Ltd
- Relation
- International Journal of Energy Research Vol. 45, no. 6 (2021), p. 9492-9501
- Rights
- All metadata describing materials held in, or linked to, the repository is freely available under a CC0 licence
- Rights
- Copyright © 2021 John Wiley & Sons Ltd
- Subject
- 0904 Chemical Engineering; 0906 Electrical and Electronic Engineering; 0913 Mechanical Engineering; Bituminous coal; Entrained flow gasifier; Gasification; Heating value; Mixed reactant; Syngas
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