Amine Adsorbents Based on N-(2-Hydroxyethyl)ethylenediamine for Carbon Dioxide Capture from simulated biogas

Abstract

N-(2-Hydroxyethyl)ethylenediamine (AEEA) was effectively loaded into a porous resin (ADS-17) using the impregnation method, resulting in the creation of a cost-effective solid amine adsorbent with a high CO2 adsorption capacity. The performance of this adsorbent was evaluated through dynamic adsorption studies, while its structure and morphology were analyzed using N2 adsorption-desorption isotherms and scanning electron microscopy (SEM). The effects of organic amine loading, adsorption temperature, and gas flow rate on its CO2 adsorption performance were thoroughly investigated. The study revealed that under specific conditions—particularly with 40% amine loading at an adsorption temperature of 25°C and a gas flow rate of 150 mL/min—the CO2 adsorption capacity of the adsorbent reached an impressive 149.36 mg/g. Furthermore, even after undergoing five cycles of regeneration, the adsorbent demonstrated good adsorption performance, indicating its stability and potential for practical application.