Advanced microporous carbon adsorbents for selective CO₂ capture: Insights into heteroatom doping and pore structure optimization
Journal of Analytical and Applied Pyrolysis, cilt.186, 2025 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 186
- Basım Tarihi: 2025
- Doi Numarası: 10.1016/j.jaap.2024.106946
- Dergi Adı: Journal of Analytical and Applied Pyrolysis
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex
- Anahtar Kelimeler: N/S co-doped porous carbons, Resins, Thiourea, CO2 adsorption
- Boğaziçi Üniversitesi Adresli: Hayır
Özet
Given the rising CO₂ emissions and their contribution to the greenhouse effect, mitigating their adverse effects on the climate is crucial. One of the most efficient methods for capturing and reducing CO₂ emissions is through adsorption using microporous carbon materials, which offers an effective separation technique to prevent these emissions from entering the atmosphere. In this study, a cost-effective and eco-friendly nitrogen and sulfur-co-doped porous carbon material originated from phenol-formaldehyde resin was synthesized by thiourea modification and KOH activating approch, for advanced CO₂ capture. The material was thoroughly characterized, and its physical and chemical properties were evaluated. By varying the activating temperature and amount of KOH, the as-prepared N/S co-doped porous carbons depicted advanced porous structure, with nitrogen/sulfur incorporated throughout the carbon matrix. The optimized N/S co-doped porous carbon showed excellent CO₂ adsorption capacities, reaching 4.46 mmol/g at 25°C and 6.38 mmol/g at 0°C under 1 bar pressure. Furthermore, the material demonstrated good CO₂/N₂ selectivity, moderate isosteric heat of adsorption, fast adsdsorption kinetics, excellent dynamic CO2 capture capacity and strong cyclic stability. The superior CO2 capture features were primarily attributed to the material's well-developed microporous matrix and the even distribution of nitrogen and sulfur functional groups within the carbon framework. In summary, this study highlights the promising capability of heteroatom-doped porous carbon adsorbents as selective CO₂ adsorbents, offering an effective approach to addressing CO₂ reduction challenges.