✦ LIBER ✦

CO2 absorption in aqueous solutions of hindered amines

✍ Scribed by A.K. Chakraborty; G. Astarita; K.B. Bischoff

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 497 KB
Volume: 41
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(86)87185-8

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✦ Synopsis

Sterically hindered amines constitute a new class of chemicals which have recently come into industrial use in a variety of gas-treating processes: chemical solvents in both aqueous and nonaqueous solutions. rate promotion additives for the hot carbonate process, and chemical solvents for the selective removal of hydrogen sulfide. The scant published data on the behavior of hindered amines do not allow one to estimate the actual values of the apparent kinetic constants or equi 1 i brium constants, and even less to establish the chemical steps involved. A thermodynamic model has been developed and tested against experimental equilibrium data. Preliminary kinetic data seem to indicate that the reaction with CO2 is first order with respect to both CD2 and AMP-A first step in the elucidation of the chemical steps involved is presented. KEYWORDS CO2 absorptl on, steri cal ly hindered ami nes.

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