Experimental Investigation and Modeling of Adsorption of Carbon Dioxide on 5A Molecular Sieve for Helium Purification of High-Temperature Gas-cooled Reactor

The adsorption capability of carbon dioxide on 5A molecular sieve (5AMS) was investigated in a fixed-bed apparatus with two-road gas mixing system by dynamic column breakthrough method with helium as the carrier gas for helium purification system of high-temperature gas-cooled reactor(HTGR). Experiments were performed at temperatures of 5 degrees C similar to 35 degrees C and low carbon dioxide partial pressure range of 10 similar to 150Pa. The carbon dioxide isotherms on 5AMS were well fitted by Dubinin-Radushkevich model and Toth model, and the isosteric heat was determined. Based on mass-transfer zone model, the experimental breakthrough curves for different operating conditions were analyzed. (C) 2013 The Authors. Published by Elsevier Ltd.