I've been thinking how refrigerants - which are highly potent greenhouse gases (hundreds and even thousands of times more potent than CO2) - are likely to be vented to atmosphere eventually either due to system leakage, accident, neglect, theft of chiller units, or deliberate discharge. It makes me wonder if, for climate change mitigation/adaptation purposes, whether we should consider all the refrigerants deployed and in storage today as being something that will ultimately be vented.
Suppose that mass migration, economic collapse or upheaval, or other calamities may lead to the abandonment, destruction, or even careless salvage of thousands or even millions of HVAC/refrigeration systems. Given that supposition, is there a practical chemical process that could be used to convert the refrigerants that are in common use today to another material - like maybe a polymer? - that would be at least somewhat stable at standard temperature and pressure? One that sequesters CO2 in the process would be a bonus but I don't expect it'd matter very much.