Single-Component Adsorption Equilibria of CO 2 , CH 4 , Water, and Acetone on Tapered Porous Carbon Molecular Sieves.

Autor: Oghenetega OO; School of Chemical & Biomolecular Engineering Georgia Institute of Technology, Atlanta, Georgia 30332, United States., Fulvio P; School of Chemical & Biomolecular Engineering Georgia Institute of Technology, Atlanta, Georgia 30332, United States., Bobbitt NS; Sandia National Laboratories, Albuquerque, New Mexico 87185, United States., Walton KS; School of Chemical & Biomolecular Engineering Georgia Institute of Technology, Atlanta, Georgia 30332, United States.
Jazyk: angličtina
Zdroj: Journal of chemical and engineering data [J Chem Eng Data] 2024 Feb 22; Vol. 69 (3), pp. 1411-1422. Date of Electronic Publication: 2024 Feb 22 (Print Publication: 2024).
DOI: 10.1021/acs.jced.3c00368
Abstrakt: Engineered carbon molecular sieves (CMSs) with tapered pores, high surface area, and high total pore volume were investigated for their CO 2 , CH 4 , water, and acetone adsorption properties at 288.15, 298.15, 308.15 K, and pressures of <1 bar. The results were compared with BPL carbon. The samples exhibited higher adsorption capacity for CO 2 compared to BPL carbon, with Carboxen 1005 being the highest due to the presence of ultramicropores (pores smaller than 0.8 nm). Similar observations were made for CH 4 except at 288.15 K. Although the CMSs exhibited higher hydrophobicity than BPL carbon, the latter had the highest acetone uptake for all investigated temperatures due to its higher oxygen content, which facilitates stronger interactions with polar VOC molecules. Heats of adsorption were calculated using the Clausius-Clapeyron equation after fitting the isotherms with the dual-site Langmuir-Freundlich model, and results largely corroborated the order of adsorption capacities of CO 2 , CH 4 , and water on the carbon materials.
Competing Interests: The authors declare no competing financial interest.
(© 2024 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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