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Estimation of dynamic change in gasification rate of chars—II. Overlapped grain model

✍ Scribed by Tadafumi Adschiri; Toshinori Kojima; Takehiko Furusawa

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
440 KB
Volume
42
Category
Article
ISSN
0009-2509

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✦ Synopsis

Structure model of solids which considers the change in degree of overlapping of grains with progress of the solid consumption reaction on the surface of the grain was presented. The proposed model can describe the dynamic change in surface area which first increases to the maximum and then decreases during char gasification using only the initial porosity and the initial surface area. The proposed model together with the previous models was compared with the experimentally observed dynamic change in surface area during gasification. This model can explain the experimental result (Adschiri and Furusawa, 1987) that the maximum surface area was obtained at the porosity of around 0.5.

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