Release of potassium in association with structural evolution during biomass combustion

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Fältnamn	Indikatorer	Metadata
000		04176naa a2200481 4500
001		oai:DiVA.org:lnu-98946
003		SwePub
008		201116s2021 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-989462 URI
024	7	a https://doi.org/10.1016/j.fuel.2020.1195242 DOI
040		a (SwePub)lnu
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Cao, Wenhanu University of Strathclyde, UK4 aut
245	1 0	a Release of potassium in association with structural evolution during biomass combustion
264	1	b Elsevier,c 2021
338		a print2 rdacarrier
500		a Epub 2020
520		a A mechanistic understanding of potassium release is essential to mitigate the potassium-induced ash problems during biomass combustion. This work studies the effects of operational condition on the potassium release and transition during the combustion of wheat straw, and elucidate the release potential of potassium associated with the structural change of biomass particles. The combustion tests were carried out in a laboratory-scale reactor, working in a wide range of temperatures and heating rates. It was found that the combustion of biomass sample at a temperature up to 1000 °C results in a release of over 60% of its initial potassium content. Raising the heating rate from 8 °C/min to 25 °C/min could lead to an additional release of up to 20% of the initial amount of potassium. A three-stage potassium release mechanism has been concluded from this work: the initial-step release stage (below 400 °C), the holding stage (400–700 °C) and the second-step release stage (above 700 °C). Comprehensive morphology analysis with elemental (i.e. K, S, O, Si) distribution was carried out; the results further confirmed that potassium is likely to exist inside the stem-like tunnel of biomass particles, mainly in forms of inorganic salts. During the heating-up process, the breakdown and collapse of biomass particle structure could expose the internally located potassium and thus accelerate the release of potassium and the transform of its existing forms. Lastly, a detailed temperature-dependent release mechanism of potassium was proposed, which could be used as the guidance to mitigate the release of detrimental potassium compounds by optimising the combustion process.
650	7	a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Energiteknik0 (SwePub)203042 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Energy Engineering0 (SwePub)203042 hsv//eng
650	7	a TEKNIK OCH TEKNOLOGIERx Industriell bioteknikx Bioenergi0 (SwePub)209042 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Industrial Biotechnologyx Bioenergy0 (SwePub)209042 hsv//eng
650	7	a TEKNIK OCH TEKNOLOGIERx Kemiteknikx Kemiska processer0 (SwePub)204012 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Chemical Engineeringx Chemical Process Engineering0 (SwePub)204012 hsv//eng
650	7	a TEKNIK OCH TEKNOLOGIERx Naturresursteknikx Energisystem0 (SwePub)207022 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Environmental Engineeringx Energy Systems0 (SwePub)207022 hsv//eng
653		a Biomass
653		a Combustion
653		a Potassium
653		a Release mechanism
653		a Bioenergiteknik/Energi- och Miljöteknik
653		a Bioenergy Technology
700	1	a Li, Junu University of Strathclyde, UK4 aut
700	1	a Lin, Leteng,d 1980-u Linnéuniversitetet,Institutionen för byggd miljö och energiteknik (BET),Bioenergy4 aut0 (Swepub:lnu)llebie
700	1	a Zhang, Xiaoleiu University of Strathclyde, UK4 aut
710	2	a University of Strathclyde, UKb Institutionen för byggd miljö och energiteknik (BET)4 org
773	0	t Fueld : Elsevierg 287, s. 1-9q 287<1-9x 0016-2361x 1873-7153
856	4	u https://strathprints.strath.ac.uk/75335/1/Cao_etal_Fuel_2020_Release_of_potassium_in_association_with_structural_evolution.pdf
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-98946
856	4 8	u https://doi.org/10.1016/j.fuel.2020.119524

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