Discussion
State whether the following is true or false.
The shrinking core model assumes the unreacted core is non-porous.
Answer: C
Correct answer: True
It is the model’s defining assumption: the reaction is confined to a sharp boundary between fully converted ash and entirely unreacted core, because nothing penetrates the core. Where the solid is porous the reaction occurs throughout the particle instead, and the progressive conversion model applies rather than this one - which is the first question to ask before fitting either.
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