H2 and COx generation from coal gasification catalyzed by a cost-effective iron catalyst

Authors: T. Popa, M. Fan, M.D. Argyle, M.D. Dyar, Y. Gao, J. Tang, E.A. Speicher, D.M. Kammen

Abstract:
The objective ofthis research is to study the effect and mechanism of FeCO₃-based catalytic gasification of a low-sulfur sub-bituminous Wyodak coal from the Powder River Basin (PRB) of Wyoming. The catalytic effect was evaluated by comparing the gas compositions and carbon conversion kinetics with and without of FeCO₃, which was realized by gasifying the coal with a fixed-bed laboratory gasifier within steam environment at atmospheric pressure. X-ray diffraction (XRD) and Mössbauer spectroscopy, and Fourier transform infrared spectroscopy (FTIR) were used to study the involved catalytic mechanism through characterization ofthe iron species and oxidation states ofthe catalyst and the composition oftar released during pyrolysis.
     Experimental results show that the catalyst is active in both pyrolysis and gasification steps, and can increase carbon conversion rate and reduce the activation energy of coal gasification. In addition, its oxidation states including magnetite (Fe₃O₄), wustite (FeO), and metallic iron, change with gasification condition. The research indicates that FeCO₃ is a promising catalyst for coal gasification.

Keywords:
Catalysis
Coal gasification
Ferrous carbonate
Powder
River
Basin coal
Kinetics

Published in: Applied catalysis A: General  (Volumes 464–465, Pages 1-384, 15 August 2013)

Publisher: Elsevier  

ISSN Information: 0926-860X

H2 and COx generation from coal gasification catalyzed by a cost-effective iron catalyst

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