Removal of chlorinated organic volatile compounds by gas phase adsorption with activated carbon
Entity
UAM. Departamento de Química Física AplicadaPublisher
Elsevier B.V.Date
2012-11-15Citation
10.1016/j.cej.2012.09.021
Chemical Engineering Journal 211-212 (2012): 246-254
ISSN
1385-8947DOI
10.1016/j.cej.2012.09.021Funded by
The authors are grateful to the Spanish “Ministerio de Ciencia e Innovación (MICINN)” and “Comunidad de Madrid” for financial support (Projects CTQ2011-26758, CTQ2009-09983 and S2009/PPQ-1545)Project
Gobierno de España. CTQ2011-26758; Gobierno de España. CTQ2009-09983; Comunidad de Madrid. S2009/PPQ-1545/LIQUORGPASEditor's Version
http://dx.doi.org/10.1016/j.cej.2012.09.021Subjects
Activated carbon; Adsorption; COSMO-RS; Chlorinated volatile organic compounds; QuímicaRights
© 2012 Elsevier B.V.Abstract
This paper discusses the removal of chlorinated volatile organic compounds (Cl-VOCs) from gas streams by means of fixed-bed adsorption with a commercial activated carbon (AC). Column experiments were performed at different conditions (inlet concentration, temperature, pressure, gas flow rate and bed length). A two-parameter model introduced by Yoon and Nelson was applied to predict the entire breakthrough curves for chloromethane adsorption. Complete regeneration of the exhausted AC was performed at mild conditions (atmospheric pressure and room temperature). In order to gain a better knowledge on the effect of the surface chemistry of AC on the adsorption of Cl-VOCs, the quantum-chemical COSMO-RS method was used to simulate the interactions between AC surface groups and different Cl-VOCs as monochloromethane, dichloromethane and trichloromethane. This information can be useful for tailoring the ACs with the objective of improving their adsorption capacities by further functionalization. To confirm this, the commercial AC tested was modified by means of different thermal and oxidative treatments (nitric acid and ammonium persulfate), being the surface chemistry and textural properties of the resulting materials characterized by different techniques. The modified ACs were then tested in column adsorption experiment with different Cl-VOCs. The uptake of these compounds increased with the basic character of the AC surface
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Google Scholar:Lemus Torres, Jesús
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Martín Martínez, María
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Palomar Herrero, José Francisco
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Gómez Sainero, Luisa María
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Gilarranz Redondo, Miguel Ángel
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Rodríguez Jiménez, Juan José
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