Raheem, A, Dupont, V orcid.org/0000-0002-3750-0266, Channa, AQ et al. (5 more authors) (2017) Parametric characterisation of air gasification of chlorella vulgaris biomass. Energy and Fuels, 31 (3). pp. 2959-2969. ISSN 0887-0624
Abstract
The gasification of green algae Chlorella vulgaris in air was investigated using both a thermogravimetric analyzer (TGA) and a bench scale horizontal axis quartz tube reactor (HQR). The full range of solid state kinetic models produced best fits with TGA results varied for the 5 subzones of conversion vs. temperature, with the nucleation and nuclei growth ‘A2’ followed by ‘A3’ or contracting volume models producing close matches for T ≤ 367 °C, zero order model between 358 and 468 °C, and contracting surface models for T ≥ 458 °C, each model yielding their set of apparent activation energy (E < 41 kJ mol¯¹) and pre-exponential factors (A > 0.04 s¯¹) corresponding to rate constants in the range 0.001 to 0.005 s¯¹. The HQR was used to investigate the effects of microalgal biomass loading, temperature and equivalence ratio (ER) on CnHm/CO/H₂ gas yield and composition, carbon conversion efficiency (CCE) and lower heating value (LHV) of syngas under air gasification conditions. Increasing microalgal biomass loading from 1 to 2 g led to a decrease in H2 content (24.2 to 19.5 vol. %) in the gases. An optimal temperature of 950 °C resulted in the highest H₂, CO and CH₄ yields at 2.9, 22.8 and 10.1 wt. % of biomass from a maximum gas yield of 76.1 wt. %, and highest H₂/CO ratio (1.75) and CCE of 56.3 %. The effect of ER was measured in two phases 0.1 to 0.26 and 0.26 to 35, respectively. During the first phase, the positive effect of ER performed a major part compared to second phase, so as the H₂ content, H₂ yield, CCE and LHV were increased.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 American Chemical Society. This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
Keywords: | Microalgae; Thermogravimetric study; Kinetic modelling; Air Gasification; Syngas; Parametric study |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Funding Information: | Funder Grant number EPSRC Not Known |
Depositing User: | Symplectic Publications |
Date Deposited: | 22 Feb 2017 10:59 |
Last Modified: | 23 Jun 2023 22:24 |
Published Version: | https://doi.org/10.1021/acs.energyfuels.6b03468 |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/acs.energyfuels.6b03468 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:112620 |