Thermodynamic carbon pump 2.0: Elucidating energy efficiency through the thermodynamic cycle

Li, Shuangjun; Deng, Shuai; Zhao, Li; Zhao, Ruikai; Yuan, Xiangzhou

doi:10.1016/j.energy.2020.119155

Cited by 6 publications

(2 citation statements)

References 32 publications

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“…The primary contributor to energy consumption in this work is the heat of desorption, and amino silica has a higher heat of adsorption than some common adsorbents, such as zeolite 13X. (Δ H = −112 kJ/mol, Δ H zeolite13X = −26.05 kJ/mol). So, the specific energy consumption of this process is higher than other commercial processes with common adsorbents such as the Hoysall et al research.…”

Section: Resultsmentioning

confidence: 99%

Parametric Study on the Performance of Amino Silica Hollow Fiber-Based Rapid Temperature Swing Adsorption Cycle for CO₂ Capture: A Multiobjective Optimization

Hosseini,

Khademi,

Talaie

et al. 2024

Energy Fuels

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Recently, CO 2 capture has been given attention as an effective way to mitigate the impacts of global warming. However, CO 2 capture through adsorption technology is restricted by the cost of energy consumption, and the optimization of this technology deserves to be noted. Rigorous mathematical models along with optimization algorithms result in significant savings in both time and cost of the experiment. In this paper, a purposeful optimization for the rapid temperature swing adsorption (RTSA) cycle using amino silica hollow fiber adsorbents was presented to evaluate the competitiveness of this fledgling technology with other adsorption methods. Achieving the highest purity and recovery as two conflicting objectives and obtaining the highest process productivity at the lowest energy consumption were two demands for the applicants, which were optimized through a hybrid model of the multiobjective differential evolution (MODE) algorithm and Technique for the Order of Preference by Similarity to Ideal Solution (TOPSIS) decision-making method. The key operating parameters containing water velocity (0.1−2 m/ s), feed and purge gas velocity (0.1−6 m/s), and cooling (15−40 °C) and heating (80−120 °C) temperatures, as well as adsorption (50−500 s), heating (100−250 s), and sweeping (20−150 s) step times, were chosen as decision variables to find the optimal operating point from the Pareto set. A summary of performance comparison between the amino silica hollow fiber-based RTSA cycle and other CO 2 capture technologies available in the literature showed that this cycle with purity and recovery above 80% operates below current international standards. In addition, the energy consumption in this system was higher than other technologies due to the high heat of adsorption of the amino silica adsorbent, which can be overcome to this challenge by choosing a suitable adsorbent or configuration.

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Section: Resultsmentioning

confidence: 99%

Parametric Study on the Performance of Amino Silica Hollow Fiber-Based Rapid Temperature Swing Adsorption Cycle for CO₂ Capture: A Multiobjective Optimization

Hosseini,

Khademi,

Talaie

et al. 2024

Energy Fuels

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“…32,34,36 This specifically results in chemical potential gradients between the ab-/adsorbed CO2 and the external "reservoirs" of CO2, leading to irreversible mass transfer. 37 If the capture media is considered as the system, and the external "reservoirs" of CO2 are considered as the surroundings, these losses can be referred to as external irreversibilities. Therefore, although an ideal thermodynamic cycle for a four-stage system is internally reversible, where the cycle is characterized by moving through a series of equilibrium states, the predicted separation work deviates from the minimum work due to external irreversibilities.…”

Section: Introductionmentioning

confidence: 99%

Insights into Energetic Penalties in Electrochemical CO2 Separation Systems

Clarke,

Brushett

2024

Preprint

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While innovative electrochemical approaches continue to emerge for carbon capture, open questions remain regarding the performance characteristics of these nascent concepts. A wide range of energy requirements have been reported; the different sources of performance loss and their relative magnitudes are not yet fully understood, challenging both quantitative comparisons between devices and identification of performance improvement pathways. Herein, we develop a mathematical framework to evaluate the energetics of four-stage electrochemical separation systems in which soluble capture chemistries are activated and deactivated in an electrochemical reactor, and bind and release carbon dioxide (CO2) in separate units. Specifically, we construct a dimensionless electrochemical reactor model, derive key groups associated with thermodynamics, kinetics, ohmic resistance, and mass transport, and, subsequently, evaluate their impact on energetic penalties. We also discuss the use of this model for exploring different performance improvement pathways. Ultimately, this work seeks to facilitate understanding of the interplay between material properties, operating conditions, and energy requirements.

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Moisture swing adsorption for direct air capture: Establishment of thermodynamic cycle

Xie,

Chen,

Yong

et al. 2024

Chemical Engineering Science

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Thermodynamic carbon pump 2.0: Elucidating energy efficiency through the thermodynamic cycle

Cited by 6 publications

References 32 publications

Parametric Study on the Performance of Amino Silica Hollow Fiber-Based Rapid Temperature Swing Adsorption Cycle for CO₂ Capture: A Multiobjective Optimization

Parametric Study on the Performance of Amino Silica Hollow Fiber-Based Rapid Temperature Swing Adsorption Cycle for CO₂ Capture: A Multiobjective Optimization

Insights into Energetic Penalties in Electrochemical CO2 Separation Systems

Moisture swing adsorption for direct air capture: Establishment of thermodynamic cycle

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Thermodynamic carbon pump 2.0: Elucidating energy efficiency through the thermodynamic cycle

Cited by 6 publications

References 32 publications

Parametric Study on the Performance of Amino Silica Hollow Fiber-Based Rapid Temperature Swing Adsorption Cycle for CO2 Capture: A Multiobjective Optimization

Parametric Study on the Performance of Amino Silica Hollow Fiber-Based Rapid Temperature Swing Adsorption Cycle for CO2 Capture: A Multiobjective Optimization

Insights into Energetic Penalties in Electrochemical CO2 Separation Systems

Moisture swing adsorption for direct air capture: Establishment of thermodynamic cycle

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Product

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Parametric Study on the Performance of Amino Silica Hollow Fiber-Based Rapid Temperature Swing Adsorption Cycle for CO₂ Capture: A Multiobjective Optimization

Parametric Study on the Performance of Amino Silica Hollow Fiber-Based Rapid Temperature Swing Adsorption Cycle for CO₂ Capture: A Multiobjective Optimization