화학공학소재연구정보센터
International Journal of Hydrogen Energy, Vol.40, No.48, 17192-17199, 2015
Na2ZrO3 stability under reforming/regeneration cycles during the steam reforming of ethanol with CO2 absorption
In this work Na2ZrO3 and a Ni-Al2O2 catalyst were used to evaluate the hydrogen production by the steam reforming of ethanol in combination with CO2 absorption (SREA). The Na2ZrO3 was synthesized by the solid state method with a Na2ZrO3/ZrO2 = 1:1 molar ratio and calcined at 900 degrees C in air. A 25% W Ni-Al2O3 catalyst was synthesized by incipient impregnation and calcined at 900 degrees C in air. During reforming, operating conditions were: H2O/C2H5OH/Na2ZrO3 = 6:1:2.5 feed molar ratio, T = 600 degrees C, SV = 414 h(-1). Na2ZrO3 absorbent was separately regenerated at 900 degrees C and air. Experimental reaction results indicate a high stability of Na2ZrO3 under 10 consecutive reforming/regeneration cycles allowing to reach SREA equilibrium values. H-2 production reached 91.3% mol of accompanied by 5.2 CO2, 1.2 CO, and 2.2 CH4% mol for each of the 10 consecutive cycles. These results show Na2ZrO3 high stability towards multi-cycle SREA operation. Copyright (c) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.