The roles of added chlorine and sulfur on ash deposition mechanisms during solid fuel combustion

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Li, XiaolongUniversity of Utah (författare)

The roles of added chlorine and sulfur on ash deposition mechanisms during solid fuel combustion

Artikel/kapitelEngelska2021

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Elsevier BV,2021

Nummerbeteckningar

LIBRIS-ID:oai:research.chalmers.se:4c9eedaf-f90e-4637-8ca6-efef8c00b233
https://research.chalmers.se/publication/521095URI
https://doi.org/10.1016/j.proci.2020.10.003DOI

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Språk:engelska
Sammanfattning på:engelska

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The focus of this paper is on effects of chlorine and sulfur on coal ash deposition rates, under practically relevant but systematically controlled combustion conditions. This problem is important, not so much for coal, but to understand and predict deposition rates for biomass combustion where chlorine contents can be high. To this end, ash deposition rates on a controlled temperature surface were measured for controlled amounts of chlorine and sulfur added to a pulverized coal, doped with potassium and burned in a 100 kW rated combustion rig. Previous work with 35 tests on 11 coal, biomass and petroleum coke fuels burned under a range of operating conditions had strongly suggested that the deposition rate of the tightly bound inside deposits was independent of the ash aerosol composition, and depended only on PM1 in the flue gas. The loosely bound outside deposition rate was dependent primarily on the total alkali content in the flue gas. The new results using chlorine added to the fuel (in the form of ammonium chloride) required these previous conclusions to be drastically revised. They showed that chlorine, not alkali alone, had large effects on the deposition rate of the inside deposits, which now were orders of magnitude higher than without chlorine addition, and did not fit previous (multi-fuel) correlations with PM1. Sulfur addition, together with chlorine, did not affect deposition rates much, although it did lower the chlorine content of the deposit. These results are interpreted in terms of the ash aerosol size segregated composition, which was also measured, and potential sulfation reactions within the deposit.

Ämnesord och genrebeteckningar

TEKNIK OCH TEKNOLOGIER Kemiteknik Kemiska processer hsv//swe
ENGINEERING AND TECHNOLOGY Chemical Engineering Chemical Process Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Kemiteknik hsv//swe
ENGINEERING AND TECHNOLOGY Chemical Engineering hsv//eng
Additives
Ash deposition
Chlorine and sulfur

Biuppslag (personer, institutioner, konferenser, titlar ...)

Wang, YuemingSoutheast University,University of Utah (författare)
Allgurén, Thomas,1986Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)ekvallt (författare)
Andersson, Klas,1977Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)klon (författare)
Wendt, Jost O.L.University of Utah (författare)
University of UtahSoutheast University (creator_code:org_t)

Sammanhörande titlar

Ingår i:Proceedings of the Combustion Institute: Elsevier BV38:3, s. 4309-43161540-7489

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Av författaren/redakt...: Li, Xiaolong; Wang, Yueming; Allgurén, Thomas ...; Andersson, Klas, ...; Wendt, Jost O.L.

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TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Kemiteknik; och Kemiska processe ...

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Kemiteknik

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Av lärosätet: Chalmers tekniska högskola

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