The effect of elevated pressure, temperature and particles morphology on the carbon dioxide capture using zinc oxide

The capture of CO2 by zinc oxide was studied in the temperature and pressure range of 25–100 °C and 5–25 bar respectively, which until now remains unexplored. The CO2 capture capacity of zinc oxide was examined as a function of particle size, surface area and pore volume. Different characterization techniques such as X-ray diffraction, scanning electron microscope, infrared spectroscopy and surface area analysis were employed. Experiment shows that 1 g of 1 h ball milled zinc oxide can capture 0.198 g CO2 at 75 °C and 10 bar in 3 h. Zinc oxide could be completely regenerated at 250 °C under argon flow.