I know nothing about emulation on the ps3. However, the ps3 cell processor is a vastly different architecture than the x86 and arm platform. This could be one hurdle for the operating system and it handles graphics. The next issue is 256mb of ram. Running a game which probably includes frameworks/libraries specifically for a game vs a complete GUI operating system and low level emulation on top of that - completely different.
In short - even if it works, don’t do it. You likely won’t get any results you will be happy with unless there was a huge community involvement. It’s the only reason the rpi, with it’s relatively low specs, has success with emulation.