Abstract
First-time experimental demonstration of simultaneous thermolysis of CO2 and H2O in a solar-driven membrane reactor.
Highlights
The utilization of the vast solar energy resource for electricity, heat, and fuels has become a key objective in research and development.[1]
The product gas composition in each stream was monitored on-line by gas chromatography (GC, Agilent 490 MicroGC)
We have demonstrated steady-state splitting of a mixed feed containing CO2 and H2O into separate streams of syngas fuel and O2 using an isothermal tubular ceria membrane reactor driven by simulated concentrated solar radiation
Summary
The utilization of the vast solar energy resource for electricity, heat, and fuels has become a key objective in research and development.[1] The conversion and storage of solar energy in fuels is especially appealing as a means to transition from fossil fuels to a “CO2 economy”.2. Existing research spans solar-driven electrochemical, photoelectrochemical, and photocatalytic paths for direct conversion, as well as indirect routes via the solar thermochemical production of syngas (H2 and CO).[3 ] CO2 CO + O2 (1) H2O H2 + O (2). The reactions are analogous; that is, both are endothermic and thermolytic, but their reaction energetics differ. This is described by the standard Gibbs free energy changes at equilibrium (ΔG = 0): G1
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