Corrosivity of flue gases during co-firing Chinese biomass with coal at fluidised bed conditions

Martti Aho (Corresponding Author), Tapio Envall, Juho Kauppinen

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)

Abstract

Five Chinese fuels (one AlSi rich coal with low S content (LSC), one sulphur rich coal with low AlSi content (HSC), two straws and one sawdust) were thoroughly analysed and burned alone and blended in a bench-scale fluidised bed reactor. Flue gases and mass flows of the elements in the fine fly ash (< 10 μm, including condensed vapours) were analysed. In addition, chemical equilibrium calculations were carried out. When burnt alone, both straws produced significant concentrations of alkali chlorides, which cause corrosive deposits on superheaters. Both coals were capable of destroying alkali chlorides during co-firing. The destruction was based mostly on sulphation with HSC, and alkali aluminium silicate formation dominated with LSC. Bed agglomeration occurred in most of the experiments, but it will be discussed elsewhere.
Original languageEnglish
Pages (from-to)82-88
Number of pages7
JournalFuel Processing Technology
Volume105
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

Coal
Alkalies
Flue gases
Biomass
Straw
Chlorides
Aluminum Silicates
Coal Ash
Superheaters
Caustics
Sawdust
Fly ash
Sulfur
Silicates
Deposits
Agglomeration
Vapors
Aluminum
Experiments

Keywords

  • fluidised bed
  • biomass
  • co-firing
  • corrosion
  • alkali chlorides

Cite this

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abstract = "Five Chinese fuels (one AlSi rich coal with low S content (LSC), one sulphur rich coal with low AlSi content (HSC), two straws and one sawdust) were thoroughly analysed and burned alone and blended in a bench-scale fluidised bed reactor. Flue gases and mass flows of the elements in the fine fly ash (< 10 μm, including condensed vapours) were analysed. In addition, chemical equilibrium calculations were carried out. When burnt alone, both straws produced significant concentrations of alkali chlorides, which cause corrosive deposits on superheaters. Both coals were capable of destroying alkali chlorides during co-firing. The destruction was based mostly on sulphation with HSC, and alkali aluminium silicate formation dominated with LSC. Bed agglomeration occurred in most of the experiments, but it will be discussed elsewhere.",
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Corrosivity of flue gases during co-firing Chinese biomass with coal at fluidised bed conditions. / Aho, Martti (Corresponding Author); Envall, Tapio; Kauppinen, Juho.

In: Fuel Processing Technology, Vol. 105, 2013, p. 82-88.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Corrosivity of flue gases during co-firing Chinese biomass with coal at fluidised bed conditions

AU - Aho, Martti

AU - Envall, Tapio

AU - Kauppinen, Juho

PY - 2013

Y1 - 2013

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AB - Five Chinese fuels (one AlSi rich coal with low S content (LSC), one sulphur rich coal with low AlSi content (HSC), two straws and one sawdust) were thoroughly analysed and burned alone and blended in a bench-scale fluidised bed reactor. Flue gases and mass flows of the elements in the fine fly ash (< 10 μm, including condensed vapours) were analysed. In addition, chemical equilibrium calculations were carried out. When burnt alone, both straws produced significant concentrations of alkali chlorides, which cause corrosive deposits on superheaters. Both coals were capable of destroying alkali chlorides during co-firing. The destruction was based mostly on sulphation with HSC, and alkali aluminium silicate formation dominated with LSC. Bed agglomeration occurred in most of the experiments, but it will be discussed elsewhere.

KW - fluidised bed

KW - biomass

KW - co-firing

KW - corrosion

KW - alkali chlorides

U2 - 10.1016/j.fuproc.2011.05.020

DO - 10.1016/j.fuproc.2011.05.020

M3 - Article

VL - 105

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EP - 88

JO - Fuel Processing Technology

JF - Fuel Processing Technology

SN - 0378-3820

ER -