(206d) Transition Metal Doped Ceria for Solar Thermochemical Fuel Production

Authors: 
Bhosale, R., Qatar University
Takalkar, G., Qatar University
One of the most attractive option for solar fuel production is solar thermochemical splitting of H2O and CO2 using metal oxide based redox pairs. Such conversion process consists of reduction and oxidation of metal oxide that eliminate the separation issue of H2 and O2 in case of water splitting reaction. Thermochemical splitting of H2O and CO2 generates a mixture of CO and H2 i.e. syngas which can be used for the production of storable and transportable liquid hydrocarbon fuels via Fischer-Tropsch (FT) process. This offers a renewable, environment friendly and long-term solution for future energy demand with CO2 mitigation. This study investigate the effect of transition metal cation as a dopant into ceria on the solar thermochemical splitting of CO2 in multiple redox cycles. Multiple transition metal based dopants are incorporated in the ceria fluorite crustal structure (with various doping levels) by using co-precipitation of hydroxides method. As-prepared doped ceria materials are characterized using various analytical techniques. The derived doped ceria materials are examined towards a two-step CO2 splitting cycle using thermogravimetric analyzer (TGA). Effects of material loading, CO2 concentration, cycling time, and reaction temperatures on thermal reduction and CO2 splitting ability of doped ceria is investigated in detail and obtained results will be presented.

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