"Rectisol."
This is a process of separating sour or 'gas that eats away at stuff' from the rest of the formula. This would be where we could, instead of using complex machines, rather separate the gases and the 'acid stuff' from 'sulphur' and that will be best achieved by boding the acids to gather outside the 'matter.' This would mean we would need to lure the acids up with the use of something they want to dissolve but cannot, so, this would call for something like, as they are trapped in carbon based matter, carbon dioxide, maybe even normal air yes? Thinking of it logically, it slowly escapes, yes?
So, we would want to release magnesium or some 'biomass gas,' maybe breath from a person, or, even better, just stick it in a chamber and release natural gases that are usually dissolved by it, yes? This would lead to a slow, yet cheap, release of the gas into the chamber, then you simply suck it all in and compress it, hey? Like 'aerosol compressed sour gas.'