Regeneration of sulfated dolomite and limestone by reductive decomposition

A. Ersoy-Mericboyu*, N. Karatepe, S. Kücükbayrak, S. Kafa, G. Gürsoy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Regeneration properties of sulfated dolomite and limestone samples were investigated. Natural stones were first fully calcined at 1223 K in a gaseous atmosphere consisting of CO2 15 vol. % and dry air 85 vol. %; second, sulfation of the calcines was achieved by reacting them with a gaseous mixture consisting of CO2 15 vol. %, SO2 0.35 vol. %, and a balance of dry air at 1223 K; last, sulfated calcines were regenerated at 1373 K by a reductive decomposition process. During regeneration a 3:1 volumetric ratio of CO2 / CO was maintained in the reducing gaseous atmosphere to minimize CaS formation. It has been found that for the fine sulfation-generation cycles the reactivity of the limestone and dolomite samples remained at acceptable levels. Since the repeated sulfation-regeneration steps caused an important change on the crystal lattice, as compared to the fresh stones, sorbent reactivity was also changed.

Original languageEnglish
Pages (from-to)589-593
Number of pages5
JournalEnergy Sources
Issue number7
Publication statusPublished - 1999


  • Dolomite
  • Limestone
  • Regeneration
  • Sulfation


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