Good explanation. Can you make a video how to limit the heat stable salt formation. I have always felt we can not eliminate it completely since multiple ways salts do form like traces of oxygen (ppm) in feed gas etc. How to minimise or design good practices to adapt against impact of heat stable salts impacts. Great & informative video guys. Congratulations
Nathan, sorry for the delay in responding i just saw this now. In systems with a combination of H2S and CO2, which are *most* amine systems, everything we've said in this series of videos applies.
If we add Phosphoric acid, we are effectively taking down some Amine and forming heat stable salts. So as I understand, when we add 1 wt% of the acid, roughly 3% of amine (ours is DIPA which has almost the same mol wt as H3PO4) would already be protonated all the time driving the equilibrium towards the formation of H2S in the regenerator. Does this phenomena work well with DIPA? or we have to buy a proprietary DIPA solvent for it?
Sooraj - yes the effect is the same on DIPA. For example, a recent refinery I simulated with 45 wt% DIPA has 236ppmw H2S in the lean amine. If I add 5000 ppmw phosphoric acid to the amine but make no operational changes whatsoever, that same lean amine now only has 31 ppmw H2S.
Good explanation. Can you make a video how to limit the heat stable salt formation. I have always felt we can not eliminate it completely since multiple ways salts do form like traces of oxygen (ppm) in feed gas etc. How to minimise or design good practices to adapt against impact of heat stable salts impacts. Great & informative video guys. Congratulations
What is max allowable HSAS?
Great series of videos. Was wondering if the story changes for systems that handle H2S and CO2 rather than just H2S?
Nathan, sorry for the delay in responding i just saw this now. In systems with a combination of H2S and CO2, which are *most* amine systems, everything we've said in this series of videos applies.
If we add Phosphoric acid, we are effectively taking down some Amine and forming heat stable salts. So as I understand, when we add 1 wt% of the acid, roughly 3% of amine (ours is DIPA which has almost the same mol wt as H3PO4) would already be protonated all the time driving the equilibrium towards the formation of H2S in the regenerator. Does this phenomena work well with DIPA? or we have to buy a proprietary DIPA solvent for it?
Sooraj - yes the effect is the same on DIPA. For example, a recent refinery I simulated with 45 wt% DIPA has 236ppmw H2S in the lean amine. If I add 5000 ppmw phosphoric acid to the amine but make no operational changes whatsoever, that same lean amine now only has 31 ppmw H2S.