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        Influence of various operational parameters in enhancing photocatalytic reduction efficiency of carbon dioxide in a photoreactor: A review

        Akhil G. Variar,Ramyashree M.S.,Veekshit Udayakumar Ail,Shanmuga Priya S.,Sudhakar K.,Muhammad Tahir 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.99 No.-

        Photocatalytic CO2 reduction is a rapidly evolving sustainable approach for CO2 reduction and renewablefuel production. The photocatalytic conversion efficiency of CO2 depends on many operational aspects. This review focuses on some of the important operational and intrinsic parameters that significantlyinfluence CO2 photocatalytic reduction efficiency. The critical parameters studied are temperature, pH,pressure, catalyst size, catalytic doping, reaction time, reaction time, feed ratio, reducing agents, type ofsolvent, the wavelength of the light source, light intensity, and effect of direct solar radiation. Thetemperature directly impacts photocatalytic reduction. Similarly, the effect of pressure was systemati-cally discussed. The morphology of photocatalysts and their effects on CO2 reduction efficiency andproducts selectivity are also deliberated. The review also focuses on a detailed assessment of the role ofphotoreactor design with the various photocatalytic reactor, their geometry, operating mode and phases. The reaction pathways for specific products are discussed based on several characterization techniques. Hence, this work gives a deeper understanding of the influential operational parameters affecting CO2photoreduction and provides new directions on optimizing them to enhance the photoreductionefficiency of CO2 to renewable fuels.

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