I am making pomegranate wine and I'm wondering if it is ok to autoclave the juice? I am using a 2L buchner flask as a fermentation vessel. Will the juice denature if I autoclave it along with the flask?
almost always. most people use campden tabs to kill off anything active in fresh juice. heating things always, always changes sugars and unfermentable flavor compounds.
unless you're doing that on purpose, don't heat your juice.