Research Article

Investigation of CO2-Sorption Characteristics of Readily Available Solid Materials for Indoor Direct Air Capturing

Figure 2

Exemplary CO2-adsorption curves for each investigated material. From top to bottom: PEI-snow with a mass fraction of 3% TTE, PEI-snow with a mass fraction of 6% TTE, PEI on silica, and K2CO3-impregnated activated carbon. The absolute adsorber performance is no indicator for adsorption capacity as different adsorber masses were used for activated carbon and PEI-based materials, respectively.