Impact of Black Body Material on CO2 Reduction Performance of P4O10/Tio2 with NH3

Nishimura A, Hanyu R, Mae H and Hu E

Published on: 2023-04-18

Abstract

Most of photocatalysts used in the CO₂ reaction reactions are only working with light of wavelength up to visible range. Namely infrared (IR) light radiation does not contribute to the reactions and is unused. If a black body material was introduced in the reactor, which could increase its temperature by absorbing the IR light and enhance the movement of gases inside the reactor by nature thermosiphon, the mass transfer and the CO₂ reduction performance might be improved. In this study, the hypothesis was tested by the CO₂ reduction with NH₃ using P₄O₁₀/TiO₂ as photocatalyst. The aim of this study is to investigate the impact of the natural thermosiphon movement of gasses around P₄O₁₀/TiO₂ photocatalyst created by black body material introduced on CO₂ reduction performance illuminated by ultraviolet light (UV) + visible light (VIS) + infrared light (IR), VIS + IR, and IR only. This study also investigates the impact of molar ratio of CO₂/NH₃ on the CO₂ reduction characteristics with P₄O₁₀. This experiment study has found the CO₂ reduction performance is indeed improved by introducing the black body material under all illumination lights. This study also has found the highest concentration of formed CO with and without black body material is obtained in the case of CO₂:NH₃ = 3:2 irrespective of illumination condition of Xe lamp. The highest concentration of formed CO with black body materials is larger than that without black body material irrespective of illumination condition of Xe lamp.