Sulfur removal from coal with supercritical fluid treatment

Jung Hoon Park, Yong Ou Joung, Sang Do Park

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Conversion and sulfur removal of coal in sub- and supercritical water was studied in a micro reactor in the temperature range of 340-400°C and water density 0-0.27 g/cm3 for 0-90 min under N2 atmosphere. The experiments were conducted to investigate the effect of reaction temperature, pressure, time and density of water on the sulfur removal in gaseous and liquid effluents, respectively. The results show that supercritical condition is more effective than sub-critical condition to remove the sulfur from coal. It is possible to reduce 57.42% of the original sulfur in coal for the reaction time of 90 min at 400°C and 30 MPa. The main gas containing sulfur in the gaseous effluent is not SO2 but H2S, irrespective of operating condition. The sulfur removal in liquid effluents is much greater than that in gas effluents. Compared with temperature, the influence of water density and pressure is less significant.

Original languageEnglish
Pages (from-to)314-318
Number of pages5
JournalKorean Journal of Chemical Engineering
Volume24
Issue number2
DOIs
StatePublished - Mar 2007

Keywords

  • Bituminous coal
  • Datong coal
  • Sub-critical condition
  • Sulfur removal
  • Supercritical water

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