Calero S, Lobato MD, García-Pérez E, Mejías JA, Lago S, Vlugt TJH, Maesen TLM, Smit B, Dubbeldam D. A Coarse-Graining Approach for the Proton Complex in Protonated Aluminosilicates.
J Phys Chem B 2006;
110:5838-41. [PMID:
16553387 DOI:
10.1021/jp060174o]
[Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have developed a computational framework for the adsorption of linear alkanes in protonated aluminosilicates. These zeolites contain trace amounts of water that form hydrated proton complexes. The presence of hydrated protons makes the simulations at the fully atomistic level difficult. Instead of constructing an elaborate and complex model, we show that an approach based on a coarse-graining of the proton-complex accurately describes the available experimental isotherms, Henry coefficients, heats of adsorption, and oxygen-proton distances. Our approach is supported by MP2 quantum mechanical simulations. The model gives remarkably good agreement with experimental data beyond the initial calibration set.
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