I do not know of there being an appeal situation to get PR
instead of TR and rather than the normal sort of an appeal where a visa has been refused, it may be that actually asking for the PR
at that stage would be appropriate but being positive in the first instance may see you get PR
I would suggest you give no mention to your study plans and that is why you want PR
because it is not really relevant and you could get a CO reacting to the intention.
Like they might think " bloody hell, the cheek, they just want PR
so as to get cheaper education! "