K-Patents has released a new application note on KOH scrubbing of acidic gas. K-Patents Refractometer PR-23-GP-FM is used to control KOH solution make-up. Fresh KOH is added when it is depleted.
An in-line measurement can ensure that there is no HF acid break through going to the flare.
Ref. 8.01.06 KOH Scrubbing of Acidic Gas (pdf)