The state of sodium and potassium in the pressurized fluidized-bed combustion and gasification of peat

Wahab Mojtahedi, Rainer Backman

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Multicomponent multiphase equilibrium calculations were carried out for pressurized fluidized-bed combustion and gasification conditions to determine the relative distribution of the alkali methals (sodium and potassium) in the gas and condensed phases.
The dependence of alkali volatilization on operating temperature, pressure, total alkali content and chlorine content of the feedstock was studied. Alkali release in the vapour phase may be much higher than is acceptable to a gas turbine, especially in gasification conditions.
Therefore the need to remove the volatilized alkali metal compounds is more acute in gasification than in combustion. The results are also compared with the measured alkali content of the effluent stream of a pressurized fluidized-bed combustor.
Original languageEnglish
Pages (from-to)189-196
JournalJournal of the Institute of Energy
Volume62
Issue number453
Publication statusPublished - 1989
MoE publication typeA1 Journal article-refereed

Fingerprint

peat
Fluidized bed combustion
gasification
Peat
Gasification
Potassium
beds
alkalies
potassium
Sodium
sodium
Alkali metal compounds
Fluidized bed combustors
alkali metal compounds
Vaporization
Feedstocks
Chlorine
Gas turbines
Effluents
vapor phases

Keywords

  • gasification

Cite this

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title = "The state of sodium and potassium in the pressurized fluidized-bed combustion and gasification of peat",
abstract = "Multicomponent multiphase equilibrium calculations were carried out for pressurized fluidized-bed combustion and gasification conditions to determine the relative distribution of the alkali methals (sodium and potassium) in the gas and condensed phases. The dependence of alkali volatilization on operating temperature, pressure, total alkali content and chlorine content of the feedstock was studied. Alkali release in the vapour phase may be much higher than is acceptable to a gas turbine, especially in gasification conditions. Therefore the need to remove the volatilized alkali metal compounds is more acute in gasification than in combustion. The results are also compared with the measured alkali content of the effluent stream of a pressurized fluidized-bed combustor.",
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journal = "Journal of the Energy Institute",
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The state of sodium and potassium in the pressurized fluidized-bed combustion and gasification of peat. / Mojtahedi, Wahab; Backman, Rainer.

In: Journal of the Institute of Energy, Vol. 62, No. 453, 1989, p. 189-196.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - The state of sodium and potassium in the pressurized fluidized-bed combustion and gasification of peat

AU - Mojtahedi, Wahab

AU - Backman, Rainer

PY - 1989

Y1 - 1989

N2 - Multicomponent multiphase equilibrium calculations were carried out for pressurized fluidized-bed combustion and gasification conditions to determine the relative distribution of the alkali methals (sodium and potassium) in the gas and condensed phases. The dependence of alkali volatilization on operating temperature, pressure, total alkali content and chlorine content of the feedstock was studied. Alkali release in the vapour phase may be much higher than is acceptable to a gas turbine, especially in gasification conditions. Therefore the need to remove the volatilized alkali metal compounds is more acute in gasification than in combustion. The results are also compared with the measured alkali content of the effluent stream of a pressurized fluidized-bed combustor.

AB - Multicomponent multiphase equilibrium calculations were carried out for pressurized fluidized-bed combustion and gasification conditions to determine the relative distribution of the alkali methals (sodium and potassium) in the gas and condensed phases. The dependence of alkali volatilization on operating temperature, pressure, total alkali content and chlorine content of the feedstock was studied. Alkali release in the vapour phase may be much higher than is acceptable to a gas turbine, especially in gasification conditions. Therefore the need to remove the volatilized alkali metal compounds is more acute in gasification than in combustion. The results are also compared with the measured alkali content of the effluent stream of a pressurized fluidized-bed combustor.

KW - gasification

M3 - Article

VL - 62

SP - 189

EP - 196

JO - Journal of the Energy Institute

JF - Journal of the Energy Institute

SN - 1743-9671

IS - 453

ER -