Simultaneous absorption of H/sub 2/S and CO/sub 2/ in aqueous MDEA. [Methyldiethanolamine]
In the simultaneous absorption of two gases in a reactive liquid, the rates of absorption of both gases are affected by their competition for the same reactive reagent. The case of absorption of two gases into a reactive liquid where one reacts under second order reaction kinetics while the other reacts instantaneously is of practical interest, since this case represents the absorption of CO/sub 2/ and H/sub 2/S into amine solutions. The rates of absorption were modeled according to the penetration theory. The model equations consisting of a system of nonlinear differential equations with a moving boundary were solved numerically. The theoretical model was applied to a description of the selective absorption of H/sub 2/S in diethanolamine solution in the presence of CO/sub 2/. The simultaneous absorption of H/sub 2/S and CO/sub 2/ gases into MDEA was studied experimentally using a stirred gas liquid absorber. This case was modeled theoretically assuming one of the gases CO/sub 2/ undergoes a second order reaction condition with the solution while the other gas, H/sub 2/S is entirely gas film controlled. The kinetics of the reaction between both gases and MDEA was studied. Unavailable physical properties such as diffusivities and solubilities of different species were measured experimentally using laminar jet apparatus.
- Research Organization:
- California Univ., Santa Barbara (USA)
- OSTI ID:
- 6000827
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Selective removal of hydrogen sulfide from carbon dioxide containing gases with methyldiethanolamine (MDEA) aqueous solutions
Modeling CO{sub 2} and H{sub 2}S solubility in MDEA and DEA: Design implications
Related Subjects
01 COAL, LIGNITE, AND PEAT
AMINES
SORPTIVE PROPERTIES
CARBON DIOXIDE
ABSORPTION
HYDROGEN SULFIDES
DESULFURIZATION
GASES
KINETIC EQUATIONS
PHYSICAL PROPERTIES
PURIFICATION
REACTION KINETICS
SOLUBILITY
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
EQUATIONS
FLUIDS
HYDROGEN COMPOUNDS
KINETICS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
SURFACE PROPERTIES
030300* - Natural Gas- Drilling
Production
& Processing
010402 - Coal
Lignite
& Peat- Purification & Upgrading