Enhanced CO۲ Adsorption Performance of Amine-Functionalized Phenolic Foams: Insights into Chemical, Structural, and Mechanical Modifications

This study investigates the enhancement of CO۲ adsorption performance in phenolic foams (PHFs) functionalized with tetraethylenepentamine (TEPA), ethylenediamine (EDA), and diethanolamine (DEA) at a weight ratio of ۰.۵%. The addition of amines significantly improved CO۲ adsorption capacity, with TEPA-modified foam achieving the highest performance due to its multifunctional nature and high nitrogen content. At ۵ bar and ۲۵°C, the TEPA-modified foam demonstrated a CO۲ adsorption capacity of ۵.۲ mmol/g, compared to ۴.۶ mmol/g for unmodified PHF, ۴.۸ mmol/g for EDA-modified foam, and ۴.۷ mmol/g for DEA-modified foam. FTIR analysis confirmed the successful incorporation of amine groups, which facilitated chemisorption while preserving the structural integrity of the foam matrix. Morphological analysis via SEM revealed mesoporous structures with optimized pore distributions in the modified foams, enhancing surface area and gas trapping capabilities. TEPA-modified foam exhibited superior adsorption capacity and mechanical stability, making it ideal for long-term CO۲ capture under dynamic operating conditions. These findings underscore the potential of amine-functionalized PHFs as efficient and durable materials for CO۲ capture applications.

کلیدواژه ها:

Phenolic foam (PHF) ، Morphology ، CO۲ capture ، Adsorption ، Amines-modified