Steam gasification characteristics of coal with rapid heating

Chihiro Fushimi, Mitsuhiro Goto, Atsushi Tsutsumi, Jun Ichiro Hayashi, Tadatoshi Chiba

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Time profiles of weight change of coal samples and the evolution of low molecular weight gases (H2, CH4, CO and CO2) in both steam gasification and pyrolysis of Yallourn brown coal and Taiheiyo subbituminous coal were measured using a thermobalance reactor with a micro GC and a mass spectrometer, in order to examine the reaction mechanism of steam gasification with rapid heating (100 K s-1). It was found that, in the case of slow heating, steam reacted with metaplast and promoted the evolution of tar above 623 K and that a water shift reaction took place above 873 K. Steam gasification of produced char occurred above 1023 K, increasing the evolution of CO, CO2 and H2. When the heating rate was high, steam reforming of volatile matter and steam gasification of metaplast took place parallel to metaplast formation and condensation. The char produced by pyrolysis was almost completely gasified and converted into H 2 and CO2 by steam. The chemical energy of coal was mainly converted into hydrogen energy and the gasification efficiency was slightly increased by rapid heating (i.e. 100 K s-1).

Original languageEnglish
Pages (from-to)185-197
Number of pages13
JournalJournal of Analytical and Applied Pyrolysis
Volume70
Issue number2
DOIs
Publication statusPublished - Dec 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Fuel Technology

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