Design, instrumentation, and operation of a standard downdraft, laboratory-scale gasification testbed utilising novel seed-propagated hybrid Miscanthus pellets
Design, instrumentation, and operation of a standard downdraft, laboratory-scale gasification testbed utilising novel seed-propagated hybrid Miscanthus pellets
Biomass gasification remains an attractive option to impact climate chaos; however, the technology presents challenges in tolerance to feedstock variability and tar production, which can limit the overall process efficiency, gasifier performance, durability and downstream syngas utilisation. The primary objectives of this study were to compare two gasifier design approaches using different reaction kinetics, based on multiple or singular oxidation and gasification reactions, and build and test a novel, flexible, laboratory-scale downdraft gasifier to convert pellets from UK hybrid Miscanthus into syngas, whilst deploying inexpensive instrumentation methods. The experimental gasification parameters studied were carbon conversion efficiency, gas yield, cold gas efficiency and gas heating values. The performance study shows that the system achieved good average temperature (842–866 °C) in the reduction zones for equivalence ratios between 0.25 and 0.35. The optimum values for carbon conversion efficiency, cold gas efficiency, heating values (HHV) of product gas and gas yield were 74%, 32%, 4.17 MJ/m3 and 1.32 m3/kg(biomass), respectively. The reported performance parameters for the new seed-propagated hybrid Miscanthus in the present study were comparable to those from conventional Miscanthus pellet gasification in downdraft gasifiers but these new hybrid varieties offer advantages in productivity over broader climatic regions compared to conventional varieties.
Control strategy, Downdraft, Gasification, Gasifier design, Miscanthus
Khan, Zakir
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Kamble, Prashant
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Reza Check, Gholam
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DiLallo, Trevor
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O'Sullivan, Willy
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Turner, Ellen D.
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Mackay, Andrew
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Blanco-Sanchez, Paula
95da2984-781a-45ae-a410-7d6472cd275b
Yu, Xi
7e4f553f-cc11-4c6e-ad6d-9fb5c3c07a60
Bridgwater, Anthony
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Paul McCalmont, Jon
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Donnison, Iain
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Watson, Ian
907eec3e-bfc9-47d3-8868-a93b35b626e2
4 April 2022
Khan, Zakir
b52c661e-931e-43b9-bcb8-dfc43269761b
Kamble, Prashant
ab5174c6-c720-442e-9d94-8cc21b1c95d3
Reza Check, Gholam
1f93735f-e0c0-48fb-b2a3-3c797afe4699
DiLallo, Trevor
dff34097-61ed-4acb-b5c9-0473b3da7711
O'Sullivan, Willy
74683cd0-3f2f-4e1e-8db3-bfbdc1aede4e
Turner, Ellen D.
af20565b-040a-4dcf-9225-07d3539ddeb3
Mackay, Andrew
8a1b54fc-59f5-41cd-af3c-122fa1199b1c
Blanco-Sanchez, Paula
95da2984-781a-45ae-a410-7d6472cd275b
Yu, Xi
7e4f553f-cc11-4c6e-ad6d-9fb5c3c07a60
Bridgwater, Anthony
f634aca3-fa31-4cdd-9979-6d661bfe6fd2
Paul McCalmont, Jon
b07e3de5-ed77-41ee-8bf9-a9a7fd0c4549
Donnison, Iain
1e86d315-3572-4774-969a-149dccb3d6c8
Watson, Ian
907eec3e-bfc9-47d3-8868-a93b35b626e2
Khan, Zakir, Kamble, Prashant, Reza Check, Gholam, DiLallo, Trevor, O'Sullivan, Willy, Turner, Ellen D., Mackay, Andrew, Blanco-Sanchez, Paula, Yu, Xi, Bridgwater, Anthony, Paul McCalmont, Jon, Donnison, Iain and Watson, Ian
(2022)
Design, instrumentation, and operation of a standard downdraft, laboratory-scale gasification testbed utilising novel seed-propagated hybrid Miscanthus pellets.
Applied Energy, 315, [118864].
(doi:10.1016/j.apenergy.2022.118864).
Abstract
Biomass gasification remains an attractive option to impact climate chaos; however, the technology presents challenges in tolerance to feedstock variability and tar production, which can limit the overall process efficiency, gasifier performance, durability and downstream syngas utilisation. The primary objectives of this study were to compare two gasifier design approaches using different reaction kinetics, based on multiple or singular oxidation and gasification reactions, and build and test a novel, flexible, laboratory-scale downdraft gasifier to convert pellets from UK hybrid Miscanthus into syngas, whilst deploying inexpensive instrumentation methods. The experimental gasification parameters studied were carbon conversion efficiency, gas yield, cold gas efficiency and gas heating values. The performance study shows that the system achieved good average temperature (842–866 °C) in the reduction zones for equivalence ratios between 0.25 and 0.35. The optimum values for carbon conversion efficiency, cold gas efficiency, heating values (HHV) of product gas and gas yield were 74%, 32%, 4.17 MJ/m3 and 1.32 m3/kg(biomass), respectively. The reported performance parameters for the new seed-propagated hybrid Miscanthus in the present study were comparable to those from conventional Miscanthus pellet gasification in downdraft gasifiers but these new hybrid varieties offer advantages in productivity over broader climatic regions compared to conventional varieties.
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Accepted/In Press date: 25 February 2022
e-pub ahead of print date: 4 April 2022
Published date: 4 April 2022
Additional Information:
Funding Information:
This work was funded by the Engineering and Physical Sciences Research Council (EPSRC) , contract number EP/M01343X/1 , Real time control of gasifiers to increase tolerances to biomass variety and reduce emissions. Prashant Kamble was kindly supported by a Government of Maharashtra scholarship (DSW/EDU/F.S/15-16/D-IV/1762).
Keywords:
Control strategy, Downdraft, Gasification, Gasifier design, Miscanthus
Identifiers
Local EPrints ID: 481566
URI: http://eprints.soton.ac.uk/id/eprint/481566
ISSN: 0306-2619
PURE UUID: b72f9b68-6101-493a-9bdb-959ee76fd781
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Date deposited: 01 Sep 2023 17:15
Last modified: 10 Apr 2024 04:01
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Contributors
Author:
Zakir Khan
Author:
Prashant Kamble
Author:
Gholam Reza Check
Author:
Trevor DiLallo
Author:
Willy O'Sullivan
Author:
Ellen D. Turner
Author:
Andrew Mackay
Author:
Paula Blanco-Sanchez
Author:
Xi Yu
Author:
Anthony Bridgwater
Author:
Jon Paul McCalmont
Author:
Iain Donnison
Author:
Ian Watson
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