Exploring a Novel Adsorbent for CO2 Capture and Gas Separation

• DOI: 10.1021/acsami.4c18745
• Publication Date: 2025-01-20T08:39:43Z
• Authors: Jaouad Al Atrach; Abdelhafid Aitblal; Abdallah Amedlous; Edwin B. Clatworthy; Diógenes Honorato...; Ying Xiong; Rémy Guillet-Nicolas; Valentin Valtchev
• Keywords: Separation (statistics)

The urgent need to mitigate carbon emissions has spurred research into small-pore zeolites as cost-effective options for CO2 capture by solid adsorbents, particularly in postcombustion and biogas separation applications. In this study we investigate levyne (LEV-type) zeolite, a largely unexplored material adsorption, novel adsorbent gas separation. Using seed-assisted synthesis approaches different conditions, nanosized micron-sized LEV were synthesized characterized terms of pathways, morphology, crystal size, chemical composition. variation the Si/Al ratios compositions resulted significant differences their adsorption capacity selectivity. Micron-sized LEV, with lower ratio = 3.5 higher Na+ content, exhibited superior uptake stronger interactions than (Si/Al 6.6). Dynamic measurements using breakthrough curve analysis revealed that twice its counterpart, along CO2/N2 CO2/CH4 selectivities. This enhanced performance, including better cyclability, emphasizes critical role zeolite improving properties. situ FTIR supported these findings, showing predominantly adsorbs physisorption, allowing efficient desorption He flow only. contrast, primarily physisorbs but also chemisorbed CO2, reflective more highly charged framework (higher Al content) extra-framework cation content. These results highlight importance strategies optimizing properties making them promising candidates physical adsorbents