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High temperature adsorption of carbon dioxide on Cu-Al hydrotalcite-derived mixed oxides: Kinetics and equilibria by thermogravimetry

Lwin, Y. and Abdullah, F. (2009) High temperature adsorption of carbon dioxide on Cu-Al hydrotalcite-derived mixed oxides: Kinetics and equilibria by thermogravimetry. [Citation Index Journal]

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Abstract

The effect of Cu/Al molar ratio on the high-temperature adsorption characteristics of CO2 on the mixed oxides of Cu-Al hydrotalcite skeletal structure has been studied by thermogravimetry. The Cu/Al molar ratio of the hydrotalcites synthesized was varied between 1.0 and 3.0, and the adsorption temperature ranged from ambient to 600 °C. The hydrotalcite with Cu/Al molar ratio of 2.0 was found to be the most suitable adsorbent for high-temperature CO2 adsorption, in both the capacity and the rate of adsorption. The activation energy values suggested that the physical adsorption dominates at low temperatures (<400 °C) and the chemisorption dominates at high temperatures (>400 °C). © 2009 Akadémiai Kiadó, Budapest, Hungary.

Item Type:Citation Index Journal
Impact Factor:1.86
Uncontrolled Keywords:Adsorption capacity; Adsorption kinetics; CO adsorption; Hydrotalcite; Mixed oxide sorbents; Thermogravimetry; Activation energy; Carbon dioxide; Chemisorption; Gas adsorption;
Subjects:T Technology > TP Chemical technology
Departments / MOR / COE:Departments > Chemical Engineering
ID Code:665
Deposited By: Assoc Prof Dr Ye Lwin
Deposited On:21 Sep 2010 00:32
Last Modified:19 Jan 2017 08:25

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