Outlook for improving energy efficiency, conversion rates, and selectivity of plasma-assisted CO2 conversion

Li, Tianyu; Gao, Yuting; Zhou, Renwu; Zhang, Tianqi; Ostrikov, Kostya (Ken)

doi:10.1016/j.cogsc.2024.100915

Cited by 5 publications

(2 citation statements)

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“…[5][6][7]. Low-temperature plasma is rich in energetic electrons, ions, free radicals and other active particles that can activate and convert small molecules in non-equilibrium conditions, offering distinct advantages [8][9][10]. These include the reduction of the energy barriers in catalytic reactions, activation of inert chemical bonds and facilitation of surface coupling, making it an exceptionally promising method [11].…”

Section: Introductionmentioning

confidence: 99%

Efficient synthesis of CO and H₂O₂ via nanosecond pulsed CO₂ bubble discharge

Gao,

Zhou,

Hong

et al. 2024

J. Phys. D: Appl. Phys.

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In the context of escalating global efforts to mitigate carbon emissions and explore sustainable energy resources, the transformation of CO2 into valuable chemicals and fuels via plasma technology has garnered significant attention. This study demonstrated a new pathway of CO2 conversion into CO and H2O2 via the bubble-enabled gas-liquid discharge driven by a nanosecond pulse. Results showed that the increased discharge frequency and larger pulse widths could enhance CO2 conversion rates and H2O2 yields, albeit potentially at the cost of reduced energy efficiency. Conversely, the rising time of pulse showed negligible impact on the process, whereas varying gas flow rates significantly altered CO and H2O2 yields, underscoring the nuanced influence of these parameters on the efficiency and selectivity of conversion processes. Through illuminating the dynamics of bubble discharge-assisted CO2 transformation, this study contributes to the broader understanding of gas-liquid discharge driven by nanosecond pulse, underlining its potential for addressing environmental and energy challenges.energy challenges.

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Section: Introductionmentioning

confidence: 99%

Efficient synthesis of CO and H₂O₂ via nanosecond pulsed CO₂ bubble discharge

Gao,

Zhou,

Hong

et al. 2024

J. Phys. D: Appl. Phys.

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“…Energy conservation and consumption reduction are imperative for the advancement of chemical processes towards low carbon emissions, and it is crucial to enhance reaction efficiency and product selectivity through diverse approaches in order to achieve these goals [1,2]. Higher alkyl methacrylate exhibits exceptional molecular design and functionalization capabilities, due to its unsaturated carbon-carbon double-bonds and high-carbon ester groups.…”

Section: Introductionmentioning

confidence: 99%

Reaction–Thin Film Evaporation Coupling Technology for Highly Efficient Synthesis of Higher Alkyl Methacrylate

Liu,

Zhang,

et al. 2024

Processes

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The traditional methacrylic esterification process, which couples reaction–distillation/rectification, suffers from issues such as prolonged reaction time, high risk of self-polymerization, and low utilization rate of methacrylic acid. By optimizing the esterification reaction of methacrylic acid through reaction–thin film evaporation coupling, compared to the reaction–distillation coupling process, the reaction time could be reduced by 37.50%, the reaction temperature could be lowered by over 15 °C, and the yield of etherification of dodecanol could be decreased by 81.25%, which significantly mitigates the risk of self-aggregation and reduces energy consumption. Furthermore, the feasibility of recovery of methacrylic acid from aqueous phase through extraction with higher aliphatic alcohol was verified, the recovery rate of methacrylic acid could reach above 96.95%, and the extracted phase could be directly utilized for preparing raw material for esterification reaction without requiring further separation steps, which effectively enhances the process economy and atomic utilization.

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Temperature‐Dependent Kinetics of Plasma‐Based CO₂ Conversion: Interplay of Electron‐Driven and Thermal‐Driven Chemistry

Mohanan,

Snoeckx,

Cha

2024

ChemSusChem

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The transformation of CO2 into chemical building blocks for various industries is considered a key technology in a net‐zero energy future. To realize this, plasma discharges are one of the most promising approaches thanks to their electron‐driven reactions and high operational flexibility. Most studies focused on room‐temperature and vibrationally‐excited discharges, however, lately, the importance of thermal reactions is considered. Therefore, we developed a temperature‐dependent plasma‐chemical reaction mechanism to investigate the temperature dependence of plasma‐based CO2 conversion. Here, we present the various effects of thermally‐driven reactions on the CO2 conversion as a function of the gas temperature and specific energy input. Our analysis pinpointed the key reactions controlling the plasma‐based CO2 conversion, shifting from an electron‐driven to a thermal‐driven regime. Additionally, we used the mechanism to verify the theoretical upper boundary of the process' energy efficiency, and discussed how our findings could lead to the further development and optimization of plasma discharges for efficient CO₂ conversion in the future.

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Outlook for improving energy efficiency, conversion rates, and selectivity of plasma-assisted CO2 conversion

Cited by 5 publications

References 53 publications

Efficient synthesis of CO and H₂O₂ via nanosecond pulsed CO₂ bubble discharge

Efficient synthesis of CO and H₂O₂ via nanosecond pulsed CO₂ bubble discharge

Reaction–Thin Film Evaporation Coupling Technology for Highly Efficient Synthesis of Higher Alkyl Methacrylate

Temperature‐Dependent Kinetics of Plasma‐Based CO₂ Conversion: Interplay of Electron‐Driven and Thermal‐Driven Chemistry

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Outlook for improving energy efficiency, conversion rates, and selectivity of plasma-assisted CO2 conversion

Cited by 5 publications

References 53 publications

Efficient synthesis of CO and H2O2 via nanosecond pulsed CO2 bubble discharge

Efficient synthesis of CO and H2O2 via nanosecond pulsed CO2 bubble discharge

Reaction–Thin Film Evaporation Coupling Technology for Highly Efficient Synthesis of Higher Alkyl Methacrylate

Temperature‐Dependent Kinetics of Plasma‐Based CO2 Conversion: Interplay of Electron‐Driven and Thermal‐Driven Chemistry

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Product

Resources

About

Efficient synthesis of CO and H₂O₂ via nanosecond pulsed CO₂ bubble discharge

Efficient synthesis of CO and H₂O₂ via nanosecond pulsed CO₂ bubble discharge

Temperature‐Dependent Kinetics of Plasma‐Based CO₂ Conversion: Interplay of Electron‐Driven and Thermal‐Driven Chemistry