Desulphurization of coals by flash pyrolysis followed by magnetic separation

Cicek B., Bilgesu A., Senelt M., Pamuk V.

FUEL PROCESSING TECHNOLOGY, vol.46, no.2, pp.133-142, 1996 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 46 Issue: 2
  • Publication Date: 1996
  • Doi Number: 10.1016/0378-3820(95)00055-0
  • Journal Name: FUEL PROCESSING TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.133-142
  • Keywords: coal, flash, pyrolysis, sulphur, DESULFURIZATION
  • Ankara University Affiliated: No

Abstract

Removal of inorganic sulphur from a Turkish lignite (Tuncbilek) by flash pyrolysis and magnetic separation was investigated. Pyrite is slightly paramagnetic, however, its paramagnetism is not sufficient to affect the separation from coal. Depending on the pyrolysis temperature pyrite, FeS2, converts to a variety of iron sulfides, among which the ferrimagnetic pyrrhotite, Fe7S8, forms at 973 K. In this study, the highest rate of sulphur removal was observed at 923 K. For the particle size of -0.1 mm, a 35% sulphur reduction was achieved by flash pyrolysis and this reduction was further enhanced to 48% by magnetic separation.