1 research outputs found
Enhanced Selectivity for CO<sub>2</sub> Adsorption on Mesoporous Silica with Alkali Metal Halide Due to Electrostatic Field: A Molecular Simulation Approach
Since
adsorption performances are dominantly determined by adsorbate–adsorbent
interactions, accurate theoretical prediction of the thermodynamic
characteristics of gas adsorption is critical for designing new sorbent
materials as well as understanding the adsorption mechanisms. Here,
through our molecular modeling approach using a newly developed quantum-mechanics-based
force field, it is demonstrated that the CO<sub>2</sub> adsorption
selectivity of SBA-15 can be enhanced by incorporating crystalline
potassium chloride particles. It is noted that the induced intensive
electrostatic fields around potassium chloride clusters create gas-trapping
sites with high selectivity for CO<sub>2</sub> adsorption. The newly
developed force field can provide a reliable theoretical tool for
accurately evaluating the gas adsorption on given adsorbents, which
can be utilized to identify good gas adsorbents