Atomistic-level non-equilibrium model for chemically reactive systems based on steepest-entropy-ascent quantum thermodynamics

16th Symmetries in Science

Li, Guanchen^1 ; Al-Abbasi, Omar^1 ; Von Spakovsky, Michael R.^1

Center for Energy Systems Research, Mechanical Engineering Department, Virginia Tech., Blacksburg

VA

24061, United States^1

关键词: Chemical affinities;    Entropy generation;    Non-equilibrium modeling;    Non-equilibrium phenomena;    Quantum thermodynamics;    Reaction coordinates;    Reaction mechanism;    Species concentration;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/538/1/012013/pdf
DOI  :  10.1088/1742-6596/538/1/012013

来源: IOP

【 摘 要 】

This paper outlines an atomistic-level framework for modeling the non-equilibrium behavior of chemically reactive systems. The framework called steepest- entropy-ascent quantum thermodynamics (SEA-QT) is based on the paradigm of intrinsic quantum thermodynamic (IQT), which is a theory that unifies quantum mechanics and thermodynamics into a single discipline with wide applications to the study of non-equilibrium phenomena at the atomistic level. SEA-QT is a novel approach for describing the state of chemically reactive systems as well as the kinetic and dynamic features of the reaction process without any assumptions of near-equilibrium states or weak-interactions with a reservoir or bath. Entropy generation is the basis of the dissipation which takes place internal to the system and is, thus, the driving force of the chemical reaction(s). The SEA-QT non-equilibrium model is able to provide detailed information during the reaction process, providing a picture of the changes occurring in key thermodynamic properties (e.g., the instantaneous species concentrations, entropy and entropy generation, reaction coordinate, chemical affinities, reaction rate, etc). As an illustration, the SEA-QT framework is applied to an atomistic-level chemically reactive system governed by the reaction mechanism F + H2⇔ FH + H.