I wouldn't entirely disagree, but the way this is presented makes it sounds as if a reservoir is intended for use as a particulate separator. I've seen hydraulic reservoirs provided with internal filters, such that the 'filter body' if you will, is actually the reservoir. Perhaps that's what your instructor is thinking.In the classroom, our instructor has been sayiong that the main device for purifying a fluid should not be a filter, but the resevoir. Do you agree with this premise (in general terms, of course)?
There are a lot of ways to remove contaminants, but from the description of the system above, it sounds like a simple filter element is the most economical way to go unless the particles are too small. That's a very real possibility. A molecular sieve is another common filtration means for removing the very fine particles such as carbon or piston ring dust. I don't see any way of altering pressure/temperature in this case though. Doing that isn't impossible but it wouldn't be economical.And is there any way you could alter the pressure or temperature of the Ethylene so as to allow the contaminants to precipitate out?