(143e) MgO-CuO-CeOx Sorbent Bead for a Trace Carbon Monoxide Removal for Fuel-Cell Grade Hydrogen Production
AIChE Annual Meeting
Monday, November 14, 2022 - 1:34pm to 1:50pm
Herein, we present the MgO-CuO-CeOx sorbent beads with very strong adsorption affinity at an extremely low pressure of CO. The adsorbents were synthesized by a combustion-assisted method. The spherical composite beads with hundreds of micrometers in diameter were highly porous, and the metals were homogeneously dispersed in the bead. The morphological characterization of spherical MgO-CuO-CeOx sorbent bead was conducted via SEM, HR-TEM, XRD, and a gas sorption analyzer. In addition, the ratio of the surface copper to bulk copper in the beads was measured through a dissociative H2 TPR method, and the adsorption capacity and mechanism were also analyzed by adding XPS analysis.
Adsorption isotherms of CO on the as-prepared composites with various metal ratios were measured by a volumetric method. The high and strong adsorption capacity was observed, especially up to 100 ppm CO. The regeneration conditions and cyclic stability were evaluated by cyclic thermogravimetric tests. Based on the analysis results, the direction of developing metal composites for various physisorption-chemisorption mechanisms accompanied by CO adsorption as well as CO removal is suggested.
 G Bang, DK Moon, JH Kang, YJ Han, KM Kim, CH Lee, Chem. Eng. J., 411 (2021)