Neutralizing Amine Dosage Estimate

Estimates downstream neutralizing amine demand to raise condensate pH into the 8.3 to 8.8 target range and neutralize carbonic acid before it attacks metal. Dose is product dependent.

$$\text{Amine dose (ppm)}\approx (2\text{ to }3)\times \mathrm{C}{\mathrm{O}}_2\text{(ppm)}$$

Variables

Symbol	Meaning	Unit
Amine dose	active neutralizing amine required	ppm
$C{O}_2$	carbon dioxide present in condensate	ppm
2 to 3	typical ppm active amine per ppm CO2	ppm/ppm

Worked example

Target condensate pH 8.3 to 8.8, dosing roughly 2 to 3 ppm active amine per 1 ppm CO2.

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Part of The Blueprint of Water