Calcium addition in straw gasification

H. Risnes, J. Fjellerup, U. Henriksen, Antero Moilanen, P. Norby, K. Papadakis, D. Posselt, L. Sorensen

Research output: Contribution to journalArticleScientificpeer-review

72 Citations (Scopus)

Abstract

The present work focuses on the influence of calcium addition in gasification. The inorganic–organic element interaction as well as the detailed inorganic–inorganic elements interaction has been studied.
The effect of calcium addition as calcium sugar/molasses solutions to straw significantly affected the ash chemistry and the ash sintering tendency but much less the char reactivity.
Thermo balance test are made and high-temperature X-ray diffraction measurements are performed, the experimental results indicate that with calcium addition major inorganic–inorganic reactions take place very late in the char conversion process.
Comprehensive global equilibrium calculations predicted important characteristics of the inorganic ash residue.
Equilibrium calculations predict the formation of liquid salt if sufficient amounts of Ca are added and according to experiments as well as calculations calcium binds silicon primarily as calcium silicates and less as potassium calcium silicates.
Original languageEnglish
Pages (from-to)641-651
JournalFuel
Volume82
Issue number6
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

Fingerprint

Ashes
Straw
Gasification
Calcium
Calcium silicate
Molasses
Sugar (sucrose)
Silicon
Potassium
Sintering
Salts
X ray diffraction
Liquids
Experiments
Temperature

Keywords

  • ash sintering
  • global equilibrium calculations
  • gasification

Cite this

Risnes, H., Fjellerup, J., Henriksen, U., Moilanen, A., Norby, P., Papadakis, K., ... Sorensen, L. (2002). Calcium addition in straw gasification. Fuel, 82(6), 641-651. https://doi.org/10.1016/S0016-2361(02)00337-X
Risnes, H. ; Fjellerup, J. ; Henriksen, U. ; Moilanen, Antero ; Norby, P. ; Papadakis, K. ; Posselt, D. ; Sorensen, L. / Calcium addition in straw gasification. In: Fuel. 2002 ; Vol. 82, No. 6. pp. 641-651.
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Risnes, H, Fjellerup, J, Henriksen, U, Moilanen, A, Norby, P, Papadakis, K, Posselt, D & Sorensen, L 2002, 'Calcium addition in straw gasification', Fuel, vol. 82, no. 6, pp. 641-651. https://doi.org/10.1016/S0016-2361(02)00337-X

Calcium addition in straw gasification. / Risnes, H.; Fjellerup, J.; Henriksen, U.; Moilanen, Antero; Norby, P.; Papadakis, K.; Posselt, D.; Sorensen, L.

In: Fuel, Vol. 82, No. 6, 2002, p. 641-651.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Calcium addition in straw gasification

AU - Risnes, H.

AU - Fjellerup, J.

AU - Henriksen, U.

AU - Moilanen, Antero

AU - Norby, P.

AU - Papadakis, K.

AU - Posselt, D.

AU - Sorensen, L.

PY - 2002

Y1 - 2002

N2 - The present work focuses on the influence of calcium addition in gasification. The inorganic–organic element interaction as well as the detailed inorganic–inorganic elements interaction has been studied. The effect of calcium addition as calcium sugar/molasses solutions to straw significantly affected the ash chemistry and the ash sintering tendency but much less the char reactivity. Thermo balance test are made and high-temperature X-ray diffraction measurements are performed, the experimental results indicate that with calcium addition major inorganic–inorganic reactions take place very late in the char conversion process. Comprehensive global equilibrium calculations predicted important characteristics of the inorganic ash residue. Equilibrium calculations predict the formation of liquid salt if sufficient amounts of Ca are added and according to experiments as well as calculations calcium binds silicon primarily as calcium silicates and less as potassium calcium silicates.

AB - The present work focuses on the influence of calcium addition in gasification. The inorganic–organic element interaction as well as the detailed inorganic–inorganic elements interaction has been studied. The effect of calcium addition as calcium sugar/molasses solutions to straw significantly affected the ash chemistry and the ash sintering tendency but much less the char reactivity. Thermo balance test are made and high-temperature X-ray diffraction measurements are performed, the experimental results indicate that with calcium addition major inorganic–inorganic reactions take place very late in the char conversion process. Comprehensive global equilibrium calculations predicted important characteristics of the inorganic ash residue. Equilibrium calculations predict the formation of liquid salt if sufficient amounts of Ca are added and according to experiments as well as calculations calcium binds silicon primarily as calcium silicates and less as potassium calcium silicates.

KW - ash sintering

KW - global equilibrium calculations

KW - gasification

U2 - 10.1016/S0016-2361(02)00337-X

DO - 10.1016/S0016-2361(02)00337-X

M3 - Article

VL - 82

SP - 641

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JO - Fuel

JF - Fuel

SN - 0016-2361

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ER -

Risnes H, Fjellerup J, Henriksen U, Moilanen A, Norby P, Papadakis K et al. Calcium addition in straw gasification. Fuel. 2002;82(6):641-651. https://doi.org/10.1016/S0016-2361(02)00337-X