Solvents and Technology Selection for Sour Gas Treatment – Shah Gas Plant Case Study

1 – Introduction of different solvent absorption processes used for gas treatment (industry experience)
1.1 -Gas sweetening (purpose; basic process description; type of impurities removed, general types of solvents)
1.2 – Tail gas treatment
1.3 – Purification of the regeneration gas from molecular sieve dehydration
Overall Shah plant process (well flui d characteristics/ process block diagram/ end products )
2 Sour Gas DGA Sweetening and solvent regeneration process applied at Shah plant

– Basic process – schematic diagram (PFD) feed sour gas composition/ sweet gas composition
Characteristics of DGA- main reactions / loading capacity for H2S and CO2 relative to (compared with ) other amines
3 TGT Flexsorb process process applied at Shah plant
– Basic process – schematic diagram (PFD) feed acid gas (waste acid gas from SRU) main components (H2S/ CO2/ N2/other gas impurities)
Characteristics of Flexsorb – absorbent selectivity for H2S versus CO2 (compared with other amines)
Requirement of total SO2 emission- after incinerator max. 500 ppm(vol)
4 Selexol process applied at Shah plant for purification of the regeneration gas from molecular sieve dehydration
Characteristics of Selexol process – types of impurities absorbed: mercaptans and sulfides
Type of absorption solvent: physical solvent, no reaction

Only the introduction will be from the internet other parts will be in the powerpoints I have uploaded it.

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