Chemical desulfurization kinetics of Mengen lignite in aqueous sodium carbonate

Bozdemir T., Durusoy T.

ENERGY SOURCES, vol.21, no.9, pp.811-820, 1999 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 21 Issue: 9
  • Publication Date: 1999
  • Doi Number: 10.1080/00908319950014362
  • Journal Name: ENERGY SOURCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.811-820
  • Keywords: desulfurization, kinetics, lignite, COAL
  • Hacettepe University Affiliated: Yes

Abstract

In the present study the effects of sodium carbonate as a leachant in desulfurization of Mengen lignite were investigated. A kinetic study was also carried out, and the shrinking core model was proposed to describe the kinetic data of pyritic sulfur removal. The highest sulfur removal percentages were observed for total and sulfate sulfur as 36.2% and 97.1%, respectively, with the use of a coal/alkali solution volume ratio of 1/70 at 120 degrees C. Desulfurization of Mengen lignite with 100 mt of 0.2 M aqueous sodium carbonate solution at 140 degrees C for 3 hours caused 96% removal of pyritic sulfur. It was also observed that the rate of leaching increased significantly with temperature and alkali solution concentration.