✦ LIBER ✦

Mass-transfer parameters in gas-solid reactive media to identify permeability of IMPEX

✍ Scribed by Hui-Bo Lu; Nathalie Mazet

Publisher: American Institute of Chemical Engineers
Year: 1999
Tongue: English
Weight: 217 KB
Volume: 45
Category: Article
ISSN: 0001-1541
DOI: 10.1002/aic.690451117

No coin nor oath required. For personal study only.

✦ Synopsis

Lu et al.'s modeling of gas-solid reaction demonstrated the significant influence of mass transfer on the global transformation of consolidated porous reacti®e media with reacti®e gas at low pressure and low permeability. Their model coupled mass transfer with chemical kinetics at the grain le®el and heat transfer with mass transfer at the pellet le®el. The comparison between simulation results and recent experiments demonstrated

that the ®alue of the material permeability ®aries during the reaction process. This study presents the permeability decrease during the synthesis process. A correlation representing the nonlinear e®olution of permeability was identified for different reacti®e materials used for experiments. These mechanisms can satisfactorily explain both the experimental measurements of global ad®ancement and local temperature profiles.

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