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Removal of CO2 from Syngas(CO2 and H2) Using Nanoporous Na2CO3/Al2O3 Adsorbents  

Bae, Jong-Soo (Department of Chemical Engineering., Kwangwoon University)
Park, Joo-Won (Department of Chemical Engineering., Kwangwoon University)
Kim, Jae-Ho (Gasification Research Center, Korea Institute of Energy Research)
Lee, Jae-Goo (Gasification Research Center, Korea Institute of Energy Research)
Kim, Younghun (Department of Chemical Engineering., Kwangwoon University)
Han, Choon (Department of Chemical Engineering., Kwangwoon University)
Publication Information
Korean Chemical Engineering Research / v.47, no.5, 2009 , pp. 646-650 More about this Journal
Abstract
Hydrocarbon gases generated from the gasification of waste could be converted into $CO_2$ and $H_2$ using reforming catalysts and then $CO_2$ was selectively adsorbed and removed to obtain pure hydrogen. To optimize adsorption efficiency for $CO_2$ removal, $Na_2CO_3$ was supported on nanoporous alumina and the efficiency was compared with commercial alumina(Degussa). Nanoporous adsorbents formed more uniform pores and larger surface area compared to adsorbents using commercial alumina. The increase of $Na_2CO_3$ loading improved adsorption of $CO_2$. Finally, the highest adsorption capacity per unit mass of $Na_2CO_3$ could be achieved when the loading of $Na_2CO_3$ reached up to 20wt%. When the content of $Na_2CO_3$ increased above 20 wt%, it aggregated on the surface, and the pore volume was decreased. Used adsorbents could be recycled by the thermal treatment.
Keywords
Na_2CO_3$; Nanoporous Alumina; $CO_2$ Adsorption; Syngas;
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