Abstract
Microkinetic, in situ analytics, and empirical modeling approaches for developing intrinsic CO2 photoreduction kinetics are presented in this Perspective. Intrinsic kinetic models that are independ...
Highlights
Reducing the impact of cumulative anthropogenic CO2 is a global challenge that requires efficient solutions
Robust and repeatable analytical methods and the use of control experiments to account for the impact of the false positive production from adventitious carbon are critical to ensuring that reliable CO2 photoreduction kinetic data are used for kinetic model development
There are many examples that have been found in the literature that use a gas chromatography (GC) system that has been fitted for both flame ionization detection (FID) and thermal conductivity detection (TCD) for CO2 photoreduction analysis.[21−24,26,28,72−82] A welldescribed GC analytical method will make comparison between CO2 photoreduction systems easier
Summary
Reducing the impact of cumulative anthropogenic CO2 is a global challenge that requires efficient solutions. The advantages that continuous-flow reactors have over batch reactors include uniform temperature and mixing that prevent the formation of gradients in the photoreactor space.[107,108] There are several examples where continuousflow photoreactors have been tion.[16,24,25,54,57−60,84,90,91,109,110] used for CO2 photoreducIn addition, continuous flow allows for inline analysis and tracking the reaction profile for CO2 photoreduction over time, leading to quicker and better insight of the process.[111] Continuous photoreactors are more likely to scale well, with the kinetic models developed, since they are energy-efficient, are safer, and have excellent process control.[107] Flow photoreactors are easier to design for high ratios of reagent gas volume to photocatalyst illuminated area; this is beneficial for collecting CO2 photoreduction data, because the kinetic data will include a higher proportion of actively participating reagent gases, leading to an intrinsic kinetic model. Further studies examining the impact of experimental error on the coefficients estimated by the mean median method will help validate the mean median method
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