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Acide Gas Processing And Mercaptans Removal - Coggle Diagram
Acide Gas Processing And Mercaptans Removal
Acid gases in a refinery are carbon dioxide (CO²) and hydrogen sulphide (H²S).
Adsorption of Acid Gases
used to remove a component (solute) from a gas stream by contacting the gas with a liquid solution (solvent).
requires the mass transfer of a substance from the gas stream to the liquid stream
Chemical Solvent
Amine gas treating
to remove H2S and CO2 from gases
Primary amines arise when one of the three hydrogen atoms in ammonia is replaced by an organic substituent.
Secondary amines have two organic substituents bound to N together with one H.
Gas Adsorption
H2S-rich stripped gas stream is then usually sent to a Claus process to convert it into elemental sulphur.
Sulphur Recovery
Also known as Claus Unit
Sulphur removal is carried out by tail gas clean up schemes.
The purpose of removing the sulphur is to reduce the sulphur dioxide (SO²) emissions in order to meet environmental guidelines
Claus Process
most significant elemental sulphur recovery process from gaseous hydrogen sulphide.
Catalyst: Pore Aluminium oxide (Alumina)
Tail Gas Clean Up
Mercaptans Removal
The predominant sulphur compounds in refinery products that usually have an unpleasant smell are mercaptans.
corrosive and disturb the fuel stability due to gum formation.
The mercaptan oxidation is called MEROX process
MEROX SWEETENING
involves the catalytic oxidation of mercaptans to disulphides in the presence of oxygen and alkalinity
Gasoline MEROX
Kerosene MEROX
