Electrochemical mass transfer modeling of a complex two phase heat transfer problem: Case of a prototype slagging gasifier |
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Authors: | A A Wragg N P Simpson M A Patrick J Kalcikova J Krysa |
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Institution: | (1) Department of Engineering, University of Exeter, Exeter, EX4 4QF, UK;(2) Department of Organic Technology, Institute of Chemical Technology, Prague Technicka 5, 166 28 Prague 6, Czech Republic;(3) Department of Inorganic Technology, Institute of Chemical Technology, Prague, Czech Republic |
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Abstract: | The local and averaged forced-convective heat transfer coefficients were estimated from measured local and averaged mass transfer
coefficients in a model slagging-gasifier hearth pool using the Chilton-Colburn analogy. A solution of ferri/ferrocyanide
and buffer with addition of CMC (carboxymethylcellulose) was used for the electrochemical mass transfer measurements. This
solution had similar properties to those of the slag in the real gasifier. The influence of natural convection due to the
differences in temperatures in the hearth was also estimated. Values of heat transfer coefficient similar to those estimated
by British Gas for the prototype Westfield gasifier were found using the mass transfer modelling method.
Published in Russian in Elektrokhimiya, 2008, Vol. 44, No. 4, pp. 447–458.
The text was submitted by the authors in English. |
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Keywords: | electrochemical modelling slagging gasifier Chilton-Colburn analogy forced-convective heat transfer mass transfer |
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