Non-equilibrium thermodynamic analysis of adsorption carbon capture: Contributors, mechanisms and verification of entropy generation

Guo, Zhihao; Deng, Shuai; Zhu, Yu; Zhao, Li; Yuan, Xiangzhou; Li, Shuangjun; Chen, Lijin

doi:10.1016/j.energy.2020.118348

Cited by 8 publications

(1 citation statement)

References 62 publications

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“…29,30 The concept has been widely used in the literature to analyze the entropy generation in various engineering applications and thermofluid systems. [58][59][60][61][62][63][64] Since the ERD system in this study is in a non-equilibrium condition from a global standpoint, the concept of NET is recruited to develop a model for evaluation of local and global entropy generation rate. A lower entropy production is only favorable if the output of the system (in ERD system, the total reaction rate) is kept at a certain amount.…”

Section: Mathematical Modelingmentioning

confidence: 99%

A Numerical Simulation of Evolution Processes and Entropy Generation for Optimal Architecture of an Electrochemical Reaction-Diffusion System: Comparison of Two Optimization Strategies

Alizadeh,

Charoen-amornkitt,

Suzuki

et al. 2023

J. Electrochem. Soc.

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Employment of electrochemical energy devices is being expanded as the world is shifting toward more sustainable power resources. To meet the required cost efficiency standards for commercialization, there is a need for optimal design of the electrodes. In this study, a topology optimization method is proposed to increase the performance of an electrochemical reaction-diffusion system. A dimensionless model is developed to characterize the transport and rate processes in the system. Two optimization strategies are introduced to improve system performance using a heterogeneous distribution of constituents. In addition, an entropy generation model is proposed to evaluate the system irreversibilities quantitatively. The findings show that the system performance could be enhanced up to 116.7% with an optimal tree-root-like structure. Such a heterogeneous material distribution provides a balance among various competing transport and rate processes. The proposed methodology could be employed in optimal design of electrodes for various electrochemical devices. This study also offers a fundamental comprehension of optimal designs by showing the connection between the optimal designs and the entropy generation. It is revealed that a less dissipating system corresponds to a more uniform current and entropy generation. Some recommendations are also made in choosing a proper optimization approach for electrochemical systems.

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