Continuous Flow Solar Desorption of CO₂ from Aqueous Amines

Abstract

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Technological Innovations in Photochemistry for Organic Synthesis: Flow Chemistry, High-Throughput Experimentation, Scale-up, and Photoelectrochemistry

“…A tube-in-tube microfluidic solar reactor was also used by Abolhasani et al for the continuous-flow desorption of CO 2 from aqueous amine sorbents under solar irradiation, and required minimal energy input for this traditionally energyintensive process. 636 Notably, this strategy provided a better access to captured CO 2 for utilization as a C1 building block.…”

Photothermal Release of CO2 Using Carbon/Silica Composite toward Direct Air Capture

“…26−28 To the best of our knowledge, the photothermal process has not been reported for the DAC although it has been reported for water adsorption from the air 29 and CO 2 absorption from flue gas using amine solvent, where the partial pressure of CO 2 is larger than air. 30,31 Therefore, a photothermal adsorbent, a combination of the photothermal heating material and the adsorbent for the DAC process, could reduce the heat energy required for the CO 2 release, because this material can be used as solar sources. In this work, we used carbon black and carbon nanotube as the photothermal heating materials.…”

“…The adsorbents contained polyethylenimine, fumed silica, and carbon materials as a chemically CO 2 adsorbing source, a support with high surface area for amine groups, and a photothermal heating material, respectively. Here, the photothermal heating material has been used for processes that require a large amount of heat energy such as steam generation. − To the best of our knowledge, the photothermal process has not been reported for the DAC although it has been reported for water adsorption from the air and CO 2 absorption from flue gas using amine solvent, where the partial pressure of CO 2 is larger than air. , Therefore, a photothermal adsorbent, a combination of the photothermal heating material and the adsorbent for the DAC process, could reduce the heat energy required for the CO 2 release, because this material can be used as solar sources. In this work, we used carbon black and carbon nanotube as the photothermal heating materials.…”