Heat and mass transfer in calcination of limestone particles

Sirpa Takkinen (Corresponding Author), Jaakko Saastamoinen, Timo Hyppänen

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

The heat and mass‐transfer phenomena occurring during the calcination of limestone particles was studied by means of modeling. The applicability of two modeling methods for calcination was compared under different conditions. An unsteady numerical particle model with mass, momentum, energy balance, and shrinking core models were chosen for the study. The influence of different phenomena (chemical kinetics, advective and diffusive mass transfer, and heat transfer) in different conditions was evaluated with the aid of dimensionless parameters, and their relative importance was shown in a regime chart. Especially, the significance of advection was studied and its importance in high CO2 concentration was observed. Local temperatures inside the particle were obtained by solving a dynamic energy balance in each particle layer including calcination reaction energy and conduction heat transfer. Noticeable temperature differences between constant ambient conditions and the particle were observed.
Original languageEnglish
Pages (from-to)2563-2572
JournalAIChE Journal
Volume58
Issue number8
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

Fingerprint

Calcium Carbonate
Limestone
Calcination
Mass transfer
Hot Temperature
Heat transfer
Energy balance
Chemical Phenomena
Temperature
Advection
Heat conduction
Reaction kinetics
Momentum

Keywords

  • mass transfer
  • mathematical modeling
  • heat transfer
  • reaction kinetics
  • circulating fluidized beds

Cite this

Takkinen, S., Saastamoinen, J., & Hyppänen, T. (2011). Heat and mass transfer in calcination of limestone particles. AIChE Journal, 58(8), 2563-2572. https://doi.org/10.1002/aic.12774
Takkinen, Sirpa ; Saastamoinen, Jaakko ; Hyppänen, Timo. / Heat and mass transfer in calcination of limestone particles. In: AIChE Journal. 2011 ; Vol. 58, No. 8. pp. 2563-2572.
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Takkinen, S, Saastamoinen, J & Hyppänen, T 2011, 'Heat and mass transfer in calcination of limestone particles', AIChE Journal, vol. 58, no. 8, pp. 2563-2572. https://doi.org/10.1002/aic.12774

Heat and mass transfer in calcination of limestone particles. / Takkinen, Sirpa (Corresponding Author); Saastamoinen, Jaakko; Hyppänen, Timo.

In: AIChE Journal, Vol. 58, No. 8, 2011, p. 2563-2572.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Heat and mass transfer in calcination of limestone particles

AU - Takkinen, Sirpa

AU - Saastamoinen, Jaakko

AU - Hyppänen, Timo

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AB - The heat and mass‐transfer phenomena occurring during the calcination of limestone particles was studied by means of modeling. The applicability of two modeling methods for calcination was compared under different conditions. An unsteady numerical particle model with mass, momentum, energy balance, and shrinking core models were chosen for the study. The influence of different phenomena (chemical kinetics, advective and diffusive mass transfer, and heat transfer) in different conditions was evaluated with the aid of dimensionless parameters, and their relative importance was shown in a regime chart. Especially, the significance of advection was studied and its importance in high CO2 concentration was observed. Local temperatures inside the particle were obtained by solving a dynamic energy balance in each particle layer including calcination reaction energy and conduction heat transfer. Noticeable temperature differences between constant ambient conditions and the particle were observed.

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KW - mathematical modeling

KW - heat transfer

KW - reaction kinetics

KW - circulating fluidized beds

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