Modeling of the isothermal sulphation reactions of natural sorbents

Ayşegül Ersoy-Meriçboyu*, Sadriye Küçükbayrak

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The sulphation reaction of the calcines produced from four limestone and one dolomite samples were investigated and modeled. The experiments were conducted in a thermogravimetric analyzer under isothermal conditions and in a gaseous atmosphere consisting of 15 vol% CO2, 0.35 vol% SO2 and balance of dry air by volume. The variation of reaction rate with temperature was determined by sulphating of calcines at three different temperatures: 1023, 1173 and 1273 K. Based on the initial sulphation rates, the apparent activation energies were calculated as 51.58, 145.20 and -37.79 kJ/mol for L01, L04 and D01 samples, respectively. The unreacted shrinking core model was chosen to describe this non-catalytic solid/gas (CaO/SO2) reaction mechanism. The experimental results were found to be correlated successfully by this model and diffusion through the calcium sulphate product layer is rate limiting.

Original languageEnglish
Pages (from-to)163-170
Number of pages8
JournalThermochimica Acta
Volume319
Issue number1-2
DOIs
Publication statusPublished - 5 Oct 1998

Keywords

  • Modeling
  • Sorbents
  • Sulphation

Fingerprint

Dive into the research topics of 'Modeling of the isothermal sulphation reactions of natural sorbents'. Together they form a unique fingerprint.

Cite this