| 초록 |
A chemical looping (CL) process for an alternative route of oxidative dehydrogenation (CL-ODH) of ethane to ethylene by cyclic redox reaction using transition metal oxides was investigated to convert ethane into ethylene by reduction step and subsequently CO2 activation to CO by oxidation step. The FeCeTiOx mixed-metal redox catalysts with different molar ratios of iron metal was applied for CL reaction. The FeCeTiOx catalyst with a molar ratio of Fe:Ce:Ti=0.150:0.075:1 showed 17.6% ethane conversion and 70.8% ethylene selectivity at the reduction step of 550 oC. From the subsequent oxidation step at 700 oC, CO was produced with 0.5mmol/gcat by CO2 activation as well. The structural and surface properties of the redox FeCeTiOx catalysts were characterized by N2 sorption, TGA, XRD, XPS and TPR analysis to verify the active sites for the CL reaction of ethane and CO2. |
