Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 60, Issue 16, Pages 5992-6005Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.1c00072
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Funding
- European Research Council (ERC) under the European Union [832460]
- European Research Council (ERC) [832460] Funding Source: European Research Council (ERC)
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Thermodynamic models that take association into account are important for predicting multiphase equilibria. By considering the relationship between chemical and perturbation theories, this study proposes a method for estimating association parameters using quantum chemistry calculations and statistical mechanics. The estimated parameters can be used to reduce the number of adjustable model parameters for equations of state.
Thermodynamic models that explicitly account for association have become essential tools for correlating and predicting multiphase equilibria. These models have many adjustable parameters, which create difficulties for uniquely fitting experimental data. Reducing the number of adjustable parameters is an important pathway to increase the reliability and extrapolation power of thermodynamic models for practical applications. In this work, we revisit the relationship between the chemical and perturbation theories of association. This relationship creates a pathway for estimating association parameters using quantum chemistry calculations and statistical mechanics. Estimated parameters are applied to pure-component calculations, which demonstrate that they can be used to reduce the number of adjustable model parameters for the cubic plus association and perturbed-chain statistical associating fluid theory equations of state.
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