Photothermal release of CO2 from capture solutions using nanoparticles

Abstract

Lowering the parasitic energy demand of CO₂ capture technologies is a basic and technical challenge. Using alternative energy sources could reduce energy costs both by lowering the energy required for regeneration and by replacing parasitic energy with renewable sources. Here we report the use of actinic light for the photo-thermal regeneration of CO₂ from capture solutions containing nanoparticles. We demonstrate an enhanced regeneration of CO₂ due to addition of carbon black nanoparticles. CO₂ regeneration efficiencies increased with higher nanoparticle concentrations and higher initial solution temperatures.