Selective gas treating produces better claus feeds

Conference · Tue Jan 01 04:00:00 EST 1980 · Oil Gas J.; (United States)

OSTI ID:6365745

Goar, B G

Methyldiethanolamine (MDEA) systems with 20-25% by wt MDEA solutions in water are cheaper and more convenient than monoethanolamine (MEA) or diethanolamine (DEA) systems for selective H/sub 2/S removal from gas streams containing H/sub 2/S and CO/sub 2/, because the amine circulation rate will be much less for the MDEA system; apparently, the reaction between MDEA and H/sub 2/S is gas-film-diffusion-rate limited, and the reaction between MDEA and CO/sub 2/ is kinetically controlled. MDEA systems facilitate selective H/sub 2/S absorption by controlling residence time, which is done by limiting the number of contact trays and the amine circulation rate. At high pressures, MDEA systems can remove H/sub 2/S down to 0.25-0.50 g/100 std cu ft, with only 20-30% of the CO/sub 2/ being co-absorbed. The MDEA system at the Husky (Oil Co.) Clark Avenue Gas Plant in Santa Maria, Calif., uses selective amine regeneration technology licensed from Shell Development Co. to enrich Claus unit feed from approx. 23 mole Vertical Bar3< H/sub 2/S up to approx. 50 mole % H/sub 2/S, thus allowing 94% sulfur recovery in a once-through system. Two other MDEA systems for high-pressure gas treating are discussed.

• Research Organization: Goar, Arrington Assoc. Inc.
• OSTI ID: 6365745
• Report Number(s): CONF-8003150-
• Conference Information: Journal Name: Oil Gas J.; (United States) Journal Volume: 78:18
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
&amp; Processing
ADSORPTION
AMINES
CHALCOGENIDES
CLAUS PROCESS
COST
ELEMENTS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INDUSTRIAL PLANTS
NATURAL GAS PROCESSING PLANTS
NONMETALS
OPTIMIZATION
ORGANIC COMPOUNDS
RECOVERY
REMOVAL
SORPTION
SULFIDES
SULFUR
SULFUR COMPOUNDS
TECHNOLOGY UTILIZATION
USES