Rate retardation phenomenon during gasification of Wandoan coal char

Xing Zhong Sha, Takashi Kyotani, Akira Tomita

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


During the course of coal gasification, the rate per unit weight of remaining char often decreases as the coal conversion increases. The present study has tried to elucidate the reason why this rate retardation occurs. Possible reasons can be roughly divided into two categories; one due to the change of the mineral matter in char, and one related to the variation of carbon structure. Char samples at different conversion levels were prepared from raw and demineralized Wandoan coal. Their reactivities and other properties were examined, and their relationship was considered. The principal reason for the rate retardation in the present case was attributed to the loss of catalytic activity of mineral matter as the conversion increases.

Original languageEnglish
Pages (from-to)1564-1567
Number of pages4
Issue number12
Publication statusPublished - 1990 Dec


  • coal char
  • conversion
  • gasification

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry


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