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Overview - Gas Sweetening Systems with Specialty Amines
Gas sweetening - the removal of acidic components such as
Hydrogen Sulphide (H2S) or Carbon Dioxide (CO2) - can be achieved in a
number of ways. The most commonly used process, however, is a liquid solvent
absorption system using one of the specialty amines. These are cost effective
when looking at removal of anything from a few hundred PPM to over 50% by
volume. Typical applications include:
- MEA for low acid gas partial pressures
- DEA for general purposes
- MDEA for selective H2S removal
- Special Solvents - licensed processes
Selection of the optimum process requires specialist knowledge
not just of the process chemistry, but also of the side effects of the amines.
These can include reactions with COS or RSH compounds, bicarbonate formation,
corrosion, salt precipitation, degradation, and BTX absorption.
KCC offers a custom designed range of amine sweetening
systems, tailored to the individual application to ensure the process
requirements can be met reliably between overhauls, while offering longer plant
life overall.
Amine units will typically be supplied with tray type absorber
columns, fired reboilers, common vent disposal systems, and optional reclaimers
as required.
Stainless steel is commonly used throughout, for construction
of wetted parts in contact with acid gases.
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