Promotion Mechanism for CO2 Absorption into Partially Carbonated Ammonia Solutions

Autor:	Yu Min Yang, Jui-Fu Shen, Jer-Ru Maa
Rok vydání:	1999
Předmět:	Work (thermodynamics) Reaction mechanism Aqueous solution Chemistry General Chemical Engineering Carbonation Thermodynamics Mineralogy General Chemistry Ammonia chemistry.chemical_compound Carbonatation Chemical equilibrium Absorption (electromagnetic radiation)
Zdroj:	JOURNAL OF CHEMICAL ENGINEERING OF JAPAN. 32:378-381
ISSN:	1881-1299 0021-9592
Popis:	Chemical enhancement factors for CO2 absorption into partially carbonated NH3 solutions in a stirred-cell absorber were experimentally determined over a wide range of carbonation ratio in this work. The results reveal that the one-reaction promotion mechanism, which is traditionally used in the literature, has shortcomings in describing the effects of initial total ammonia concentration and carbonation ratio on absorption enhancement. A shuttle mechanism, by which NH3 and CO2 undergo an irreversible second-order reaction in the interface region while the chemical equilibrium of multiple reactions prevails in the bulk region to liberate free NH3, is then proposed for the absorption enhancement. The calculation of the bulk-liquid compositions is made by using the rigorous thermodynamic package in ASPEN PLUS simulator. The chemical enhancement factors predicted by the present promotion mechanism are in good agreement with the experimental data available.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::aeaf388b6581135338ca39f414f0a678 https://doi.org/10.1252/jcej.32.378 Zobrazit plný text záznamu