Browsing by Author "Orhan, Ozge Yuksel"

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    Kinetics of Carbon Dioxide Absorption by Nonaqueous Solutions of Promoted Sterically Hindered Amines
    (Elsevier Science Bv, 2017) Gordesli Duatepe, Fatma Pinar; Orhan, Ozge Yuksel; Alper, Erdogan
    The mechanism and kinetics of CO2 capture using piperazine (PZ) promoted nonaqueous solutions of 2-amino-2methyl- 1,3-propanediol (AMPD) and 2-amino-2-ethyl-1,3-propanediol (AEPD) were investigated by stopped-flow technique. The termolecular mechanism was used to model the kinetics of the reactions. AMPD or AEPD like other sterically hindered amines absorbs CO2 in an equimo lar ratio that is significantly higher than that of monoethanolamine (MEA). However, the steric hinderance results in decreased reaction rate as in the case of AMPD and AEPD. The reaction can be p romoted by addition of small amounts of cyclic polyamines, such as PZ or its derivatives. Our results show clearly that nonaqueous solutions of AMPD and AEPD can achieve reaction rates comparable to commercial systems by the addition of small amounts of PZ. (C) 2017 The Authors. Published by Elsevier Ltd.