CO2 reduction to syngas and carbon nanofibres by plasma-assisted in situ decomposition of water

Mahammadunnisa, Shaik; Reddy, E. Linga; Ray, Debjothi; Subrahmanyam, Ch.; Whitehead, J. Christopher

doi:10.1016/j.ijggc.2013.04.008

Cited by 70 publications

(53 citation statements)

References 27 publications

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“…Non-thermal plasma technology has been regarded as a promising alternative to the thermal catalytic route for converting low value and inert carbon emissions, such as CH 4 and CO 2 , into value-added fuels and chemicals at atmospheric pressure due to its non-equilibrium characteristic, low energy cost and unique capability to induce both physical and chemical reactions at ambient conditions. [5][6][7] In non-thermal plasmas, the overall plasma gas temperature can be as low as room temperature, while the electrons are highly energetic with an average electron energy of 1-10 eV which can easily break down most chemical bonds of inert molecules and produce chemically reactive species such as radicals, excited atoms, molecules, and ions for chemical reactions. The non-equilibrium character of such plasmas could enable thermodynamically unfavorable reactions (e.g., CO 2 splitting) to occur at low temperatures (e.g., <200 8C).…”

Section: Introductionmentioning

confidence: 99%

Optimization of CO₂ Conversion in a Cylindrical Dielectric Barrier Discharge Reactor Using Design of Experiments

Mei

Liu

et al. 2015

Plasma Process. Polym.

125

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In this work, a coaxial dielectric barrier discharge reactor has been developed for the decomposition of CO 2 at atmospheric pressure. The response surface methodology based on a three-factor, three-level Box-Behnken design has been developed to investigate the effects of key independent process parameters (discharge power, feed flow rate, and discharge length) and their interactions on the reaction performance in terms of CO 2 conversion and the energy efficiency of the plasma process. Two quadratic polynomial regression models have been established to understand the relationships between the plasma process parameters and the performance of the CO 2 conversion process. The results indicate that the discharge power is the most important factor affecting CO 2 conversion, while the feed flow rate has the most significant impact on the energy efficiency of the process. The interactions between different plasma process parameters have a very weak effect on the conversion of CO 2 . However, the interactions of the discharge length with either discharge power or gas flow rate have a significant effect on the energy efficiency of the plasma process. The optimal process performance-CO 2 conversion (14.3%) and energy efficiency (8.0%) for the plasma CO 2 conversion process is achieved at a discharge power of 15.8 W, a feed flow rate of 41.9 ml Á min À1 and a discharge length of 150 mm as the highest global desirability of 0.816 is obtained at these conditions. The reproducibility of the experimental results successfully demonstrates the feasibility and reliability of the design of experiments approach for the optimization of the plasma CO 2 conversion process.

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Section: Introductionmentioning

confidence: 99%

Optimization of CO₂ Conversion in a Cylindrical Dielectric Barrier Discharge Reactor Using Design of Experiments

Mei

Liu

et al. 2015

Plasma Process. Polym.

125

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“…Another study on plasma-catalysis simultaneous activation of CO 2 and H 2 O in a dielectric barrier discharge reactor operated at atmospheric pressure was presented in Ref. [38]. CO 2 conversion is improved by application of partially reduced Ni/Al 2 O 3 catalyst.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous dissociation of CO2 and H2O to syngas in a surface-wave microwave discharge

Chen

Silva

Georgieva

et al. 2015

International Journal of Hydrogen Energy

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“…The effect of the gas flow rate, discharge power, discharge length and photocatalytic effect towards CO 2 conversion and energy efficiency also have been reported by Mei et al [18,19]. Zeng et al studied the effect of Ni/Al 2 O 3 on CO 2 hydrogenation with Ar as a diluent gas [20]. They reported almost 56.1% CO 2 conversion in 60% Ar mixture.…”

Section: Introductionmentioning

confidence: 77%

“…Short-term processes such as CO 2 sequestration, carbon storage and capture cannot offer a permanent solution [1,2]. Efforts have been done to develop cost-effective and energy-efficient technologies to reduce CO 2 .…”

Section: Introductionmentioning

confidence: 99%

DBD Plasma Assisted CO2 Decomposition: Influence of Diluent Gases

2017

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Carbon dioxide (CO 2 ) partial reduction to carbon monoxide (CO) and oxygen has been conducted in a dielectric barrier discharge reactor (DBD) operating a packed bed configuration and the results are compared with that of no packing condition. The effect of diluent gas is studied to understand the influence on dielectric strength of the plasma gas on CO 2 splitting, with the objective of obtaining the best CO selectivity and high energy efficiency. Typical results indicated that among N 2 , He and Ar gases, Ar showed the best decomposition efficiency. Glass beads packing has a strong influence on the performance, probably due to the enhanced field strength due to dielectric nature of the packed material. In a similar manner, Ar mole ratio in the gas mixture also played a significant role, where the maximum CO 2 conversion of 19.5% was obtained with packed DBD at CO 2 :Ar ratio 1:2. The best CO yield (16.8%) was also obtained under the same conditions. The highest energy efficiency was found to be 0.945 mmol/kJ. The activated species formed inside the CO 2 plasma were identified by optical emission spectroscopy.

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CO2 reduction to syngas and carbon nanofibres by plasma-assisted in situ decomposition of water

Cited by 70 publications

References 27 publications

Optimization of CO₂ Conversion in a Cylindrical Dielectric Barrier Discharge Reactor Using Design of Experiments

Optimization of CO₂ Conversion in a Cylindrical Dielectric Barrier Discharge Reactor Using Design of Experiments

Simultaneous dissociation of CO2 and H2O to syngas in a surface-wave microwave discharge

DBD Plasma Assisted CO2 Decomposition: Influence of Diluent Gases

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CO2 reduction to syngas and carbon nanofibres by plasma-assisted in situ decomposition of water

Cited by 70 publications

References 27 publications

Optimization of CO2 Conversion in a Cylindrical Dielectric Barrier Discharge Reactor Using Design of Experiments

Optimization of CO2 Conversion in a Cylindrical Dielectric Barrier Discharge Reactor Using Design of Experiments

Simultaneous dissociation of CO2 and H2O to syngas in a surface-wave microwave discharge

DBD Plasma Assisted CO2 Decomposition: Influence of Diluent Gases

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Product

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Optimization of CO₂ Conversion in a Cylindrical Dielectric Barrier Discharge Reactor Using Design of Experiments

Optimization of CO₂ Conversion in a Cylindrical Dielectric Barrier Discharge Reactor Using Design of Experiments