Studies into the kinetic compensation effects of Loy Yang Brown coal during gasification in a steam environment – A mechanistic view

This study aims to investigate the kinetic compensation effects (KCE) and gain insights into the mechanisms, during gasification of Loy Yang brown coal char with steam, in an in-situ fluidized bed gasification operation for two-particle size ranges (106–150 and 180–212 µm). The instantaneous rate of...

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Autores principales:	Manoj Kumar Jena, Muhammad Asif Akhtar, Vineet Kumar, Shaomin Liu, Chun-Zhu Li, Hari Vuthaluru
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Kinetic compensation effect, Steam gasification Catalysed water-gas-shift reaction, Loy Yang brown coal Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/d46b468f41ae4be391f4bbccb15f9090
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spelling	oai:doaj.org-article:d46b468f41ae4be391f4bbccb15f90902021-11-18T04:52:53ZStudies into the kinetic compensation effects of Loy Yang Brown coal during gasification in a steam environment – A mechanistic view2666-821110.1016/j.ceja.2021.100159https://doaj.org/article/d46b468f41ae4be391f4bbccb15f90902021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121000752https://doaj.org/toc/2666-8211This study aims to investigate the kinetic compensation effects (KCE) and gain insights into the mechanisms, during gasification of Loy Yang brown coal char with steam, in an in-situ fluidized bed gasification operation for two-particle size ranges (106–150 and 180–212 µm). The instantaneous rate of char gasification and CO, CO₂, and H₂ formation was measured by continuous monitoring of product gas composition through a quadrupole mass spectrometer. Gasification of the smaller particle size range (106–150 µm) in kinetics-controlled regime shows less importance of char-catalyzed element on the WGS reaction, as revealed by the apparent activation energy and apparent frequency factor for CO and CO₂ formation. However, the study of kinetic parameters of char consumption on gasification using coal char with larger particle sizes (180–212 µm) indicated the limitations of intraparticle diffusion. That potentially affects the CO₂ formation by catalyzed WGS through re-adsorption of CO on catalytic char surface at a higher conversion level (> 0.3) as revealed by the difference in the extent of KCE for CO and CO₂ formation. The difference in the extent of KCE for char consumption and H₂ formation for bigger particles indicates the intraparticle diffusion limitations also appear to affect the route of H₂ formation, i.e., significantly produced through adsorption on catalytical active site with less involving the carbon active sites on char surface.Manoj Kumar JenaMuhammad Asif AkhtarVineet KumarShaomin LiuChun-Zhu LiHari VuthaluruElsevierarticleKinetic compensation effect, Steam gasificationCatalysed water-gas-shift reaction, Loy Yang brown coalChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 8, Iss , Pp 100159- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Kinetic compensation effect, Steam gasification Catalysed water-gas-shift reaction, Loy Yang brown coal Chemical engineering TP155-156
spellingShingle	Kinetic compensation effect, Steam gasification Catalysed water-gas-shift reaction, Loy Yang brown coal Chemical engineering TP155-156 Manoj Kumar Jena Muhammad Asif Akhtar Vineet Kumar Shaomin Liu Chun-Zhu Li Hari Vuthaluru Studies into the kinetic compensation effects of Loy Yang Brown coal during gasification in a steam environment – A mechanistic view
description	This study aims to investigate the kinetic compensation effects (KCE) and gain insights into the mechanisms, during gasification of Loy Yang brown coal char with steam, in an in-situ fluidized bed gasification operation for two-particle size ranges (106–150 and 180–212 µm). The instantaneous rate of char gasification and CO, CO₂, and H₂ formation was measured by continuous monitoring of product gas composition through a quadrupole mass spectrometer. Gasification of the smaller particle size range (106–150 µm) in kinetics-controlled regime shows less importance of char-catalyzed element on the WGS reaction, as revealed by the apparent activation energy and apparent frequency factor for CO and CO₂ formation. However, the study of kinetic parameters of char consumption on gasification using coal char with larger particle sizes (180–212 µm) indicated the limitations of intraparticle diffusion. That potentially affects the CO₂ formation by catalyzed WGS through re-adsorption of CO on catalytic char surface at a higher conversion level (> 0.3) as revealed by the difference in the extent of KCE for CO and CO₂ formation. The difference in the extent of KCE for char consumption and H₂ formation for bigger particles indicates the intraparticle diffusion limitations also appear to affect the route of H₂ formation, i.e., significantly produced through adsorption on catalytical active site with less involving the carbon active sites on char surface.
format	article
author	Manoj Kumar Jena Muhammad Asif Akhtar Vineet Kumar Shaomin Liu Chun-Zhu Li Hari Vuthaluru
author_facet	Manoj Kumar Jena Muhammad Asif Akhtar Vineet Kumar Shaomin Liu Chun-Zhu Li Hari Vuthaluru
author_sort	Manoj Kumar Jena
title	Studies into the kinetic compensation effects of Loy Yang Brown coal during gasification in a steam environment – A mechanistic view
title_short	Studies into the kinetic compensation effects of Loy Yang Brown coal during gasification in a steam environment – A mechanistic view
title_full	Studies into the kinetic compensation effects of Loy Yang Brown coal during gasification in a steam environment – A mechanistic view
title_fullStr	Studies into the kinetic compensation effects of Loy Yang Brown coal during gasification in a steam environment – A mechanistic view
title_full_unstemmed	Studies into the kinetic compensation effects of Loy Yang Brown coal during gasification in a steam environment – A mechanistic view
title_sort	studies into the kinetic compensation effects of loy yang brown coal during gasification in a steam environment – a mechanistic view
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/d46b468f41ae4be391f4bbccb15f9090
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Studies into the kinetic compensation effects of Loy Yang Brown coal during gasification in a steam environment – A mechanistic view

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