This paper proposes a new artificial photosynthesis （AP） system that involves a photovoltaic/thermal （PV/T） device to convert solar energy into heat and power, and the heat is supplied to adsorption-based carbon dioxide capture, and the power is supplied to the reduction reaction. This paper will build and couple the PV/T device, adsorption carbon capture, and carbon reduction reaction models. Then, the amount of captured carbon dioxide to that required by the reduction reaction process will be comparatively analyzed. Results show that MOF-74 can capture 6 times more carbon dioxide than activated carbon, so it has a better potential for carbon dioxide capture. However, when the MOF-74 adsorbent mass is higher than 50 kg, the carbon dioxide capture's thermal efficiency decreases to below 20%. Moreover, when a 1 square meter PV/T panel with 10 solar concentrations is used, 5 kg of MOF-74 can capture 0.45 kg/d of carbon dioxide, which subsequently enabled 0.152 kg/d of methane production.
Key words
solar energy /
artificial photosynthesis /
gas adsorption /
electrolytic reduction
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