HCl to sulfuric acid tank 1

[fugacity19]

I have an FRP tank lined with PFA which was once used to hold 35% HCl (at room temperature and atmospheric pressure).

I am considering converting that tank over to a concentrated sulfuric acid tank (same conditions).

So I want to know if I can do this. The chemical resistance for sulfuric and HCl with PFA is alright, but the chloride ions can permeate (essentially diffuse) through the PFA liner and I am wondering if that will cause a problem structurally to the tank or even if chloride ions can diffuse back into the tank and contaminate the sulfuric acid.

If anyone has any info or a link to a paper about this, I'd appreciate it.

 

[cawse001]

Aside from the chemical compatability issues you have highlighted, there are significant differences in the SG of the two liquids, which needs to be assessed against the structural design basis of the tank.

NB