Role of Water Vapor in Oxidative Decomposition of Calcium Sulfide

Shengji Wu, Md A. Uddin, Shinsuke Nagamine, Eiji Sasaoka

Research output: Contribution to journalConference articlepeer-review


In gasifiers of coal, decomposition of limestone into CaO and CO2 depend on the concentration and pressure of CO2 and the temperature. The basic characters of the oxidative decomposition of CaS were studied using reagent grade CaS to determine a method for perfect conversion of CaS formed from a natural lime to CaSO4. The role of H2O in the oxidative decomposition of CaS carried out using a flow-type thermogravimetric apparatus at 1 atm was studied. At 900°C, the presence of H2O drastically accelerated the decomposition of CaS with O2. CaS directly reacted with H2O at 800°-1000°C and formed CaO, SO2, and H2. The evolution of SO2 in the 10% H2O-1% O2-He system indicated that there is a synergistic effect of H2O and O2 on the oxidative decomposition of CaS. H2O played an important role in the oxidative decomposition of CaS even if the O2 concentration was high.

Original languageEnglish
Pages (from-to)405-406
Number of pages2
JournalACS Division of Fuel Chemistry, Preprints
Issue number1
Publication statusPublished - Mar 2003
EventProceedings of the 2003 SPE/EPA/DOE Exploration Production Environmental Conference - San Antonio, TX, United States
Duration: Mar 10 2003Mar 12 2003

ASJC Scopus subject areas

  • Energy(all)


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