Combustion Characterisation of Bituminous Coal and Pinus Sawdust Blends by Use of Thermo-Gravimetric Analysis

The cocombustion of coal and pinus sawdust waste is an economically viable and sustainable option for increasing the share of biomass in energy production. This technology also has the potential to reduce the emission of greenhouse gases from existing coal fired power plants. The thermal synergistic...

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Autores principales:	Garikai T. Marangwanda, Daniel M. Madyira, Patrick G. Ndungu, Chido H. Chihobo
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	coal biomass cocombustion thermogravimetric analysis ignition index burnout index Technology T
Acceso en línea:	https://doaj.org/article/59d269eccc6f41b78c7dec618aa19bf6
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spelling	oai:doaj.org-article:59d269eccc6f41b78c7dec618aa19bf62021-11-25T17:26:30ZCombustion Characterisation of Bituminous Coal and Pinus Sawdust Blends by Use of Thermo-Gravimetric Analysis10.3390/en142275471996-1073https://doaj.org/article/59d269eccc6f41b78c7dec618aa19bf62021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7547https://doaj.org/toc/1996-1073The cocombustion of coal and pinus sawdust waste is an economically viable and sustainable option for increasing the share of biomass in energy production. This technology also has the potential to reduce the emission of greenhouse gases from existing coal fired power plants. The thermal synergistic effects of cocombusting Hwange bituminous coal (HC) with Pinus sawdust (PS) were thus investigated using thermogravimetric analysis. Fuel blending mass ratios of 100HC, 90HC10PS, 80HC20PS, 70HC30PS, and 100PS under an oxidative atmosphere at three different heating rates of 5, 12.5, and 20 °C/min were used for the experimental setup. Zero to negative synergy was generally observed for the mass loss curves (TG) at different blending ratios. Generally positive synergy was observed with relation to rate of mass loss curves (DTG) for the 80HC20PS and 70HC30PS fuel blends only. The ignition index increased with blending ratio by an average of 42.86%, whilst the burnout index showed a maximum increase of 14.6% at 20 °C/min. However, the combustion index representative of stability showed a decreasing trend generally for all the heating rates. No combustion index produced a linear variation with temperature, though upon evaluation, an optimum mass ratio of 20% pinus sawdust was suggested. The chosen optimum blending ratio demonstrated increased ignition and burnout indexes whilst maintaining the stability of combustion at a reasonable range.Garikai T. MarangwandaDaniel M. MadyiraPatrick G. NdunguChido H. ChihoboMDPI AGarticlecoalbiomasscocombustionthermogravimetric analysisignition indexburnout indexTechnologyTENEnergies, Vol 14, Iss 7547, p 7547 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coal biomass cocombustion thermogravimetric analysis ignition index burnout index Technology T
spellingShingle	coal biomass cocombustion thermogravimetric analysis ignition index burnout index Technology T Garikai T. Marangwanda Daniel M. Madyira Patrick G. Ndungu Chido H. Chihobo Combustion Characterisation of Bituminous Coal and Pinus Sawdust Blends by Use of Thermo-Gravimetric Analysis
description	The cocombustion of coal and pinus sawdust waste is an economically viable and sustainable option for increasing the share of biomass in energy production. This technology also has the potential to reduce the emission of greenhouse gases from existing coal fired power plants. The thermal synergistic effects of cocombusting Hwange bituminous coal (HC) with Pinus sawdust (PS) were thus investigated using thermogravimetric analysis. Fuel blending mass ratios of 100HC, 90HC10PS, 80HC20PS, 70HC30PS, and 100PS under an oxidative atmosphere at three different heating rates of 5, 12.5, and 20 °C/min were used for the experimental setup. Zero to negative synergy was generally observed for the mass loss curves (TG) at different blending ratios. Generally positive synergy was observed with relation to rate of mass loss curves (DTG) for the 80HC20PS and 70HC30PS fuel blends only. The ignition index increased with blending ratio by an average of 42.86%, whilst the burnout index showed a maximum increase of 14.6% at 20 °C/min. However, the combustion index representative of stability showed a decreasing trend generally for all the heating rates. No combustion index produced a linear variation with temperature, though upon evaluation, an optimum mass ratio of 20% pinus sawdust was suggested. The chosen optimum blending ratio demonstrated increased ignition and burnout indexes whilst maintaining the stability of combustion at a reasonable range.
format	article
author	Garikai T. Marangwanda Daniel M. Madyira Patrick G. Ndungu Chido H. Chihobo
author_facet	Garikai T. Marangwanda Daniel M. Madyira Patrick G. Ndungu Chido H. Chihobo
author_sort	Garikai T. Marangwanda
title	Combustion Characterisation of Bituminous Coal and Pinus Sawdust Blends by Use of Thermo-Gravimetric Analysis
title_short	Combustion Characterisation of Bituminous Coal and Pinus Sawdust Blends by Use of Thermo-Gravimetric Analysis
title_full	Combustion Characterisation of Bituminous Coal and Pinus Sawdust Blends by Use of Thermo-Gravimetric Analysis
title_fullStr	Combustion Characterisation of Bituminous Coal and Pinus Sawdust Blends by Use of Thermo-Gravimetric Analysis
title_full_unstemmed	Combustion Characterisation of Bituminous Coal and Pinus Sawdust Blends by Use of Thermo-Gravimetric Analysis
title_sort	combustion characterisation of bituminous coal and pinus sawdust blends by use of thermo-gravimetric analysis
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/59d269eccc6f41b78c7dec618aa19bf6
work_keys_str_mv	AT garikaitmarangwanda combustioncharacterisationofbituminouscoalandpinussawdustblendsbyuseofthermogravimetricanalysis AT danielmmadyira combustioncharacterisationofbituminouscoalandpinussawdustblendsbyuseofthermogravimetricanalysis AT patrickgndungu combustioncharacterisationofbituminouscoalandpinussawdustblendsbyuseofthermogravimetricanalysis AT chidohchihobo combustioncharacterisationofbituminouscoalandpinussawdustblendsbyuseofthermogravimetricanalysis
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Combustion Characterisation of Bituminous Coal and Pinus Sawdust Blends by Use of Thermo-Gravimetric Analysis

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