Adsorptive separation of carbon dioxide by polyethyleneimine modified adsorbents

• Published in: The Korean journal of chemical engineering Vol. 29; no. 2; pp. 249 - 262
• Main Authors: Sharma, Pankaj, Baek, Il-Hyun, Park, Ye-Won, Nam, Sung-Chan, Park, Jeong-Hun, Park, Sang-Do, Park, Sung Youl
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.02.2012; 한국화학공학회
• Subjects: Biotechnology; Catalysis; Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Materials Science; 화학공학; MCM-48; Mesoporous Material; Carbon Dioxide Removal; MCM-41; PEI (Polyethyleneimine); MEA (Monoethanolamine)
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-011-0158-6

Utilization of carbon dioxide (CO 2 ) has become an important global issue due to significant and continuous rise in atmospheric CO 2 concentrations. To find a potential solution, two types of mesoporous materials, MCM-41 and MCM-48, were synthesized and impregnated with 30, 50 and 70 wt% of polyethyleneimine (PEI) in methanol to evaluate the performance of the materials in terms of CO 2 adsorption. The materials were characterized by XRD, TGA, FTIR, TEM, SEM, N 2 -physisorption and BET techniques. All the PEI-loaded materials exhibited substantially higher reversible CO 2 adsorption-desorption behaviors with >99% recovery. The above study proved that MCM-48 is a better material as compared to MCM-41 for loading of PEI. The material with 50 wt% loading of PEI on MCM-48, showed maximum adsorption of 248 mg/g-PEI at 80 °C which is about 30 times higher than that of MCM-48 and about 2.3 times that of pure PEI.