chemical kinetics; heat transfer; thermodynamics; energy conversion; fluid dynamics; CO2; solar fuels
(2013), On the effect of the presence of solid diluents during Zn oxidation by CO2, in Industrial & Engineering Chemistry Research
, 52(5), 1859-1869.
(2012), Review: Photochemical and Thermochemical Production of Solar Fuels from H2O and CO2 Using Metal Oxide Catalysts, in INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
, 51(37), 11828-11840.
(2012), Syngas Production from H2O and CO2 over Zn Particles in a Packed-bed Reactor, in AICHE JOURNAL
, 58(2), 625-631.
(2011), CO2 Reduction with Zn Particles in a Packed-Bed Reactor, in AICHE JOURNAL
, 57(9), 2529-2534.
(2011), Concentrated Solar Energy for Thermochemically Producing Liquid Fuels from CO2 and H2O, in JOM
, 63(1), 32-34.
(2011), Solar syngas production from CO2 and H2O in a two-step thermochemical cycle via Zn/ZnO redox reactions: Thermodynamic cycle analysis, in INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
, 36(19), 12141-12147.
(2010), CO2 splitting via the solar thermochemical cycle based on Zn/ZnO redox reactions, 25-30.
(2010), Review of the two-step H2O/CO2 splitting solar thermochemical cycle based on Zn/ZnO redox reactions, in Materials
, 3(11), 4922-4938.
(2010), SOLAR SYNGAS PRODUCTION FROM H2O AND CO2 VIA TWO STEP THERMOCHEMICAL CYCLES BASED ON FeO/Fe3O4 REDOX REACTIONS: KINETIC ANALYSIS, in ASME 4th Int. Conf. on Energy Sustainability
(2010), Solar Syngas Production from H2O and CO2 via Two-Step Thermochemical Cycles Based on Zn/ZnO and FeO/Fe3O4 Redox Reactions: Kinetic Analysis, in ENERGY & FUELS
, 24, 2716-2722.
(2010), Solar Syngas Production via H2O/CO2-Splitting Thermochemical Cycles with Zn/ZnO and FeO/Fe3O4 Redox Reactions, in CHEMISTRY OF MATERIALS
, 22(3), 851-859.
Objectives - The thrust of this project is to examine the fundamental phenomena of chemical thermodynamics, kinetics, and combined heat and mass transfer in gas-solid thermochemical reactions for chemically reducing CO¬2 to CO with metal oxide redox pairs in a two-step solar thermochemical cycle. The first high-temperature endothermic step is the thermal reduction of a metal oxide to a lower valence metal oxide or metal and O2 using concentrated solar radiation; and the second low-temperature exothermic step is the chemical reduction of CO2 to CO by oxidizing the lower valence metal oxide or metal; the cycle is completed by recycling the metal oxide back to the first step. The CO produced from the reaction can be burned or further processed via water-gas shift (producing syngas) and Fischer-Tropsch reactions to produce carbon neutral solar fuels. The chemical thermodynamics will be used to assess the entire CO2 splitting cycle, and effective kinetics and combined heat and mass transfer will be used to design, construct and run a chemical reactor for effecting the chemical reduction of CO2 ? the second step in the two-step thermochemical cycle. Competitive reactions with mixtures of CO2 and H2O reacted with the lower-valence metal oxide or metal will also be quantified for the production of high-quality syngas. Significance - This research facilitates the advancement of fundamental thermosciences directed at furthering solar-chemical technologies. The results garnered from this research provide the underlying building blocks for other research aimed at reducing CO2 to CO in lower temperature redox reactions with metals or low-valence metal oxides. This research has the potential to provide sustainable, clean, and efficient energy paths and offers a promising alternative to the direct sequestration of captured CO2.