Microwave-assisted Green Synthesis of Mesoporous Zeolite Adsorbents for Direct Air Capture of CO2

Abstract Mesoporous LTA-zeolites with a Si/Al molar ratios of 1.1–1.8 were synthesized using a template-free flow microwave heating system. Because the obtained mesoporous zeolites showed relatively lower hydrophilicity at RH < 50% and high CO2/N2 separation performance, it could be expected to provide a direct air capture of carbon dioxide for onsite usage in consumer sections.