Journal
FUEL
Volume 143, Issue -, Pages 555-562Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2014.11.096
Keywords
Steam; Tar destruction; Volatile-char interactions; Gas phase reactions; Steam-char reactions
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Funding
- Commonwealth of Australia under the Australia-China Science and Research Fund
- Australian Research Council [DP110105514]
- Curtin University of Technology through the Curtin Research Fellowship Scheme
- National Science Foundation of China [51176062]
- State Key Development Program for Basic Research of China [2010CB227003]
- China Scholarship Council
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This study aims to investigate the importance of steam to tar destruction during the volatile-char interactions. Steam was supplied in the absence and presence of nascent char during the pyrolysis/gasification of biomass at 850 degrees C. In the absence of char, steam has more significant effects on the reforming of large aromatic ring systems (e.g. >2 fused benzene rings) than small and isolated aromatics. In the presence of char, steam can significantly enhance the reforming of both large and small aromatic ring systems during the volatile-char interactions, especially when the steam-char reactions are also significant. The results indicate that the steam-char reactions are particularly inhibited in a thin char bed by the volatile-char interactions. It is believed that the steam-char reactions can produce additional active sties on the char, such as the radicals/intermediates of char gasification and/or the O-containing groups, to facilitate tar reforming during the volatile-char interactions. (C) 2014 Elsevier Ltd. All rights reserved.
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