Journal
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
Volume 92, Issue -, Pages 243-248Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jmgm.2019.08.003
Keywords
Adsorption; Anionic surfactant; Carbon dioxide; Molecular dynamics; Zeolite
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Funding
- DGAPA, UNAM-Mexico [IN102017]
- DGTIC-UNAM grant LANCAD-UNAM-DGTIC [238]
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Molecular dynamics simulations are carried out to study adsorption of Carbon dioxide (CO2) in a zeolite modified with anionic surfactants at different gas concentrations. Sodium dodecyl sulfate (SDS) surfactant is used and simulations at different SDS concentrations were conducted. The results show that adsorption of the gas is influenced by the amount of SDS on the zeolite surface. In addition, gas retention inside and outside the solid is observed and it strongly depends on the free sodium ions in the zeolite. The most favorable adsorption takes place at low CO2 concentrations with few SDS molecules. Adsorption was studied in terms of density profiles and pair correlation functions and strong interactions of the CO2 molecules with the sodium ions were observed. (C) 2019 Elsevier Inc. All rights reserved.
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