Tips to speed up gas filtering?

After coming back from a long break, I learned the hard way that the way filtration units work got a bit of an update. Now, if the filters run out, unfiltered gas is just run all the way through the filtered slot.

Anyways, this led to a TON of pollutant in my high temp CO2 storage tank. I hooked up a filtration unit to remove the gas, but it's been going astronomically slow. When I hooked up 5 units, it seemed to go a bit faster, but still way too slow for my liking.

Any advice to try and remove the gas faster? The CO2 is way too hot to try and liquify the pollutant, and I want to avoid losing the gas or cooling it down.