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Updated: Jun 11, 2025
10:18
Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography
Published on: February 21, 2017
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A theoretical study of thermal properties and structural evolution in binary carbonates phase change material:
Heqing Tian1, Wenguang Zhang1, Chaxiu Guo1
1School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China.
The Journal of Chemical Physics
|October 8, 2024
Summary
This study developed a potential energy function for Na2CO3-K2CO3 molten salt using advanced simulations. Results indicate Na+ ions may enhance heat storage potential in these thermal energy storage materials.
Area of Science:
- Materials Science
- Chemical Engineering
- Computational Chemistry
Background:
- Renewable energy's intermittency necessitates efficient thermal energy storage solutions.
- Molten salts are promising phase change materials for thermal energy storage (TES) due to their high energy density.
- Understanding the thermophysical properties and ionic behavior of molten salts is crucial for TES optimization.
Purpose of the Study:
- To construct a potential energy function for binary Na2CO3-K2CO3 molten salt.
- To investigate the thermal properties and structural evolution of this molten salt system.
- To assess the potential of Na2CO3-K2CO3 as a phase change material for thermal energy storage.
Main Methods:
- Utilized the Deep Potential GENerator (DPGEN) enhanced sampling method to construct the potential energy function.
- Performed deep potential molecular dynamics simulations to calculate thermal properties and structural evolution.
- Analyzed viscosity, thermal conductivity, diffusion coefficients, energy barriers, and ionic properties.
Main Results:
- Viscosity and thermal conductivity decrease with increasing temperature (1073–1273 K).
- Smaller ionic radius and higher diffusion coefficient observed for Na+ compared to K+.
- Na+ ions exhibit higher energy barriers against Coulomb forces, suggesting greater heat storage potential.
Conclusions:
- The DPGEN method provides accurate predictions for molten salt thermal properties.
- Binary Na2CO3-K2CO3 molten salt shows promise for thermal energy storage applications.
- Na+-containing molten salts may offer superior heat storage capabilities for renewable energy systems.
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