Towards a mechanistic understanding of particle shrinkage during biomass pyrolysis via synchrotron X-ray microtomography and in-situ radiography

Abstract Accurate modelling of particle shrinkage during biomass pyrolysis is key to the production of biochars with specific morphologies. Such biochars represent sustainable solutions to a variety of adsorption-dependent environmental remediation challenges. Modelling of particle shrinkage during...

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Autores principales:	Meredith Rose Barr, Rhodri Jervis, Yeshui Zhang, Andrew J. Bodey, Christoph Rau, Paul R. Shearing, Dan J. L. Brett, Maria‐Magdalena Titirici, Roberto Volpe
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bcffd8d2f5ec42998a0ac97025b9cf50
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spelling	oai:doaj.org-article:bcffd8d2f5ec42998a0ac97025b9cf502021-12-02T14:16:17ZTowards a mechanistic understanding of particle shrinkage during biomass pyrolysis via synchrotron X-ray microtomography and in-situ radiography10.1038/s41598-020-80228-x2045-2322https://doaj.org/article/bcffd8d2f5ec42998a0ac97025b9cf502021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80228-xhttps://doaj.org/toc/2045-2322Abstract Accurate modelling of particle shrinkage during biomass pyrolysis is key to the production of biochars with specific morphologies. Such biochars represent sustainable solutions to a variety of adsorption-dependent environmental remediation challenges. Modelling of particle shrinkage during biomass pyrolysis has heretofore been based solely on theory and ex-situ experimental data. Here we present the first in-situ phase-contrast X-ray imaging study of biomass pyrolysis. A novel reactor was developed to enable operando synchrotron radiography of fixed beds of pyrolysing biomass. Almond shell particles experienced more bulk shrinkage and less change in porosity than did walnut shell particles during pyrolysis, despite their similar composition. Alkaline pretreatment was found to reduce this difference in feedstock behaviour. Ex-situ synchrotron X-ray microtomography was performed to study the effects of pyrolysis on pore morphology. Pyrolysis led to a redistribution of pores away from particle surfaces, meaning newly formed surface area may be less accessible to adsorbates.Meredith Rose BarrRhodri JervisYeshui ZhangAndrew J. BodeyChristoph RauPaul R. ShearingDan J. L. BrettMaria‐Magdalena TitiriciRoberto VolpeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Meredith Rose Barr Rhodri Jervis Yeshui Zhang Andrew J. Bodey Christoph Rau Paul R. Shearing Dan J. L. Brett Maria‐Magdalena Titirici Roberto Volpe Towards a mechanistic understanding of particle shrinkage during biomass pyrolysis via synchrotron X-ray microtomography and in-situ radiography
description	Abstract Accurate modelling of particle shrinkage during biomass pyrolysis is key to the production of biochars with specific morphologies. Such biochars represent sustainable solutions to a variety of adsorption-dependent environmental remediation challenges. Modelling of particle shrinkage during biomass pyrolysis has heretofore been based solely on theory and ex-situ experimental data. Here we present the first in-situ phase-contrast X-ray imaging study of biomass pyrolysis. A novel reactor was developed to enable operando synchrotron radiography of fixed beds of pyrolysing biomass. Almond shell particles experienced more bulk shrinkage and less change in porosity than did walnut shell particles during pyrolysis, despite their similar composition. Alkaline pretreatment was found to reduce this difference in feedstock behaviour. Ex-situ synchrotron X-ray microtomography was performed to study the effects of pyrolysis on pore morphology. Pyrolysis led to a redistribution of pores away from particle surfaces, meaning newly formed surface area may be less accessible to adsorbates.
format	article
author	Meredith Rose Barr Rhodri Jervis Yeshui Zhang Andrew J. Bodey Christoph Rau Paul R. Shearing Dan J. L. Brett Maria‐Magdalena Titirici Roberto Volpe
author_facet	Meredith Rose Barr Rhodri Jervis Yeshui Zhang Andrew J. Bodey Christoph Rau Paul R. Shearing Dan J. L. Brett Maria‐Magdalena Titirici Roberto Volpe
author_sort	Meredith Rose Barr
title	Towards a mechanistic understanding of particle shrinkage during biomass pyrolysis via synchrotron X-ray microtomography and in-situ radiography
title_short	Towards a mechanistic understanding of particle shrinkage during biomass pyrolysis via synchrotron X-ray microtomography and in-situ radiography
title_full	Towards a mechanistic understanding of particle shrinkage during biomass pyrolysis via synchrotron X-ray microtomography and in-situ radiography
title_fullStr	Towards a mechanistic understanding of particle shrinkage during biomass pyrolysis via synchrotron X-ray microtomography and in-situ radiography
title_full_unstemmed	Towards a mechanistic understanding of particle shrinkage during biomass pyrolysis via synchrotron X-ray microtomography and in-situ radiography
title_sort	towards a mechanistic understanding of particle shrinkage during biomass pyrolysis via synchrotron x-ray microtomography and in-situ radiography
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/bcffd8d2f5ec42998a0ac97025b9cf50
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Towards a mechanistic understanding of particle shrinkage during biomass pyrolysis via synchrotron X-ray microtomography and in-situ radiography

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