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K2CO3-catalysed steam gasification of supercritical extracted chars

✍ Scribed by Shang Jung Yuh; Eduardo E. Wolf

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
493 KB
Volume
62
Category
Article
ISSN
0016-2361

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✦ Synopsis

The K&O,-catalysed steam gasification of coal chars, obtained by the Supercritical Gas Extraction (SGE) process, is studied. Kinetics experiments used a gravimetric technique at atmospheric pressure and at temperatures ranging from 700 to 800Β°C. It was found that K&O, is an effective catalyst for steam gasification of solvent extracted residue. The catalytic effect was similar to that observed for gasification of the unextracted parent coal. The gasification-time curves exhibited a sigmoid shape, which reduced to a single master curve for the various reaction temperatures studied and fitted well the predictions of the random caoillarv model. Activation eneraies. calculated using this model, varied from 155 to 173 kJ mol-' for the bario;s chars studied.

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