Document Type
Article
Publication Date
1-26-2015
Abstract
Activated carbon (AC) samples were modified using nitration followed by reduction to enhance their CO2 adsorption capacities. Besides characterization of the samples, investigation of CO2 capture performance was conducted by CO2 isothermal adsorption, temperature-programmed (TP) CO2 adsorption, cyclic CO2 adsorption–desorption, and dynamic CO2 adsorption tests. Almost all modified samples showed a rise in the amount of CO2 adsorbed when the comparison is made in unit surface area. On the other hand, some of the samples displayed a capacity superior to that of the parent material when compared in mass unit, especially at elevated temperatures. Despite ~65% decrease in the surface area, TP-CO2 adsorption of the best samples exhibited increases of ~10 and 70% in CO2 capture capacity at 30 and 100 �C, respectively.
Keywords
Activated carbon, Surface modification, Anchoring, Amino groups, Nitration
Corp List
Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
Divisions
sch_che
Funders
Fundamental Research Grant Scheme (FP031-2013A)
Publication Title
Bulletin of the Korean Chemical Society
Volume
36
Issue
2
Publisher
Korean Chemical Society, Seoul & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim