MDEA Acid Gas Loading: What Does mol/mol Mean?

An operating solvent report lists an acid gas loading of 0.20 mol/mol. Before comparing it with another report, check which acid gases are included and how the laboratory calculates the amine quantity. Those definitions determine what the ratio describes for an MDEA-based gas treating solvent.

Identify both sides of the ratio

Acid gas loading is commonly expressed as moles of acid gas per mole of total amine. Confirm whether the numerator includes H₂S, CO₂ or their combined amount, and identify the amine basis used in the denominator. Gas Processing & LNG

For a hypothetical calculation, 20 mol of combined acid gases divided by 100 mol of amine gives 0.20 mol/mol. Keep the stated gas and amine definitions with the result.

Check the amine basis for formulated solvents

For a solvent containing N-methyldiethanolamine (MDEA, CAS 105-59-9) and another amine component, ask how each component contributes to the denominator. Confirm whether the laboratory uses individually measured concentrations or another defined analytical basis.

Use matching definitions when reviewing results from different laboratories or comparing historical data.

Keep the sampling point with the result

Record whether the sample represents lean solvent, rich solvent or another location in the unit. Include the collection time, solvent concentration and relevant operating conditions.

If the team calculates a rich-minus-lean loading difference, confirm that the samples represent comparable operating conditions and use the same analytical and calculation basis.

Connect solvent analysis with the supply specification

Have the process team interpret operating loading results against the unit’s approved requirements. For fresh-solvent procurement, provide the required grade, concentration and formulation reference separately from the operating analysis.

Send China Amines Co., Limited your approved MDEA grade, required quantity, preferred packaging and destination port. Include the batch documentation your team needs for incoming inspection and solvent inventory records.

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Technical references

• Gas Processing & LNG — Amine Strength in Gas Treatment
• BASF Gas Treatment — Formulations and Solvents