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Amine Gas Sweetening & Acid Gas Removal Calculator chemical
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Amine Gas Sweetening & Acid Gas Removal Calculator

Calculate amine solvent circulation rates (GPM), acid gas removal duties, absorber column diameter, and reboiler duty across MEA, DEA, and MDEA per GPSA Section 21.

Sour Gas Feed & Acid Gas Composition

0.85% = 8,500 ppm

Amine Solvent Selection & Loading

MDEA design: 0.40 - 0.50

Sweetening Capacity & Circulation Sizing

Amine Circulation Flow Rate
-- GPM
-- m³/h circulation
Total Acid Gas Removed
-- lbmol/hr
-- MMSCFD acid gas
Reboiler Steam Duty
-- MMBtu/hr
-- ton/h LP steam
Absorber Column Internal Diameter: -- in
Daily Sulfur Equivalent Removed: -- Metric Tons/day
Net Loading Delta (Δα): -- mol/mol
Corrosion Risk Evaluation: Normal
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Frequently Asked Questions

Why is MDEA widely favored over MEA and DEA for gas sweetening?

MDEA (Methyldiethanolamine) is a tertiary amine that reacts kinetically fast with H2S via proton transfer, but reacts very slowly with CO2. This allows MDEA to selectively remove highly toxic H2S to meeting 4 ppm pipeline specifications while slipping harmless CO2 through, drastically reducing solvent circulation rates and reboiler heating duty.

What determines the maximum rich loading limit in amine systems?

When acid gases dissolve in amine solution, they form carbamates and bisulfides that are corrosive to carbon steel. To prevent accelerated erosion-corrosion, operating guidelines cap rich loading at ~0.35 mol/mol for primary amines (MEA), ~0.42 for secondary amines (DEA), and ~0.45 - 0.50 for tertiary amines (MDEA).

How does an amine regeneration reboiler strip acid gases?

Rich amine enters the top of the stripper column and flows downward to the reboiler heated by low-pressure steam (40-60 psig / 150°C). Boiling the solvent generates stripping steam that reverses the chemical equilibrium, breaking the amine-acid gas bond and driving gaseous CO2 and H2S overhead to a sulfur recovery unit (SRU).