- Title
- Kinetic absorption of CO2 into blended ammonia (NH3) solutions with a new cyclic amine 4-Aminomethyltetrahydropyran (4-AMTHP)
- Creator
- Li, Lichin; Puxty, Graeme; Maeder, Marcel; Burns, Robert; Yu, Hai; Conway, William
- Relation
- Energy & Fuels Vol. 33, Issue 6, p. 5377-5383
- Publisher Link
- http://dx.doi.org/10.1021/acs.energyfuels.9b00394
- Publisher
- American Chemical Society (ACS)
- Resource Type
- journal article
- Date
- 2019
- Description
- Research into the improvement of CO2 absorption rates in ammonia-based absorbents via addition of fast reacting primary/secondary amines are of great interest. In this work, a new substituted cyclic amine 4-aminomethyltetrahydropyran (4-AMTHP) was blended with aqueous ammonia to increase its reactivity toward CO2. Stopped-flow spectrophotometry was employed to investigate the underlying reaction mechanism between dissolved CO2(aq) and a series of blended NH3/4-AMTHP solutions under homogeneous conditions. A comprehensive chemical model describing the blended 4-AMTHP–NH3–CO2–H2O system, which involves a total of 11 kinetic reactions and 15 species, has been developed and further evaluated to explore the experimental kinetic and CO2 mass transfer data measured from a bench-scale wetted-wall column. From the resulting data, it was demonstrated here that the addition of a small quantity of ∼0.3 M 4-AMTHP into the 3 M NH3/0.9 M CO2 solution can effectively increase the kinetic reactivity during CO2 absorption into aqueous ammonia solutions, resulting in a ∼50% increase in mass transfer.
- Subject
- solution chemistry; amines; absorption; mass transfer; kinetics; SDG 13; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1461288
- Identifier
- uon:46161
- Identifier
- ISSN:0887-0624
- Language
- eng
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