Abstract
CO2 photoreduction to hydrocarbons is an important process for solar energy. Herein, the reaction rate is massively pushed up by large Fresnel lens (diameter = 1 m) concentrating solar light technology. The maximum CH4 yield rate reached 3157.2 μmol·g−1·h−1, C2H4 rate to 511.6 μmol·g−1·h−1, C2H6 to 1346.0 μmol·g−1·h−1, and the CO2 conversion reached 3.94%. The total solar to chemical energy conversion efficiency got 0.15%. The results are considered from the intensification of reaction conditions such as light intensity, reaction temperature, and pressure of H2O and CO2. The findings will be beneficial for the further discussion of CO2 photoreduction basing upon the existed catalysts system, and decrease the research threshold in CO2 photoreduction.
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