Post-plasma catalytic oxidative CO2 reforming of methane over Ni-based catalysts

Li, Kai; Liu, Jing‐Lin; Li, Xiaosong; Zhu, Xiaobing; Zhu, Ai‐Min

doi:10.1016/j.cattod.2015.03.013

Cited by 20 publications

(7 citation statements)

References 24 publications

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“…[55][56][57][58][59][60][61][62] The bestc ombined result was a conversion of 44 %w ith an energy cost of 5.2 eV per molecule. [56] In spark discharges, the minimum energy cost has been reported to be approximately 3-10 eV per molecule for conversionsbetween 10 and 85 %, [63][64][65][66][67][68][69][70] with the best total conversion of 85% with an energy cost of 3.2 eV per molecule. [63] Atmospheric pressure glow discharges also seem to be promising for DRM, with maximum conversionso f3 5-85% and energyc osts of 1-60 eV per molecule.…”

Section: Measured Conversion Energy Efficiencya Nd Energycostmentioning

confidence: 99%

Dry Reforming of Methane in a Gliding Arc Plasmatron: Towards a Better Understanding of the Plasma Chemistry

et al. 2017

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Dry reforming of methane (DRM) in a gliding arc plasmatron is studied for different CH fractions in the mixture. The CO and CH conversions reach their highest values of approximately 18 and 10 %, respectively, at 25 % CH in the gas mixture, corresponding to an overall energy cost of 10 kJ L (or 2.5 eV per molecule) and an energy efficiency of 66 %. CO and H are the major products, with the formation of smaller fractions of C H (x=2, 4, or 6) compounds and H O. A chemical kinetics model is used to investigate the underlying chemical processes. The calculated CO and CH conversion and the energy efficiency are in good agreement with the experimental data. The model calculations reveal that the reaction of CO (mainly at vibrationally excited levels) with H radicals is mainly responsible for the CO conversion, especially at higher CH fractions in the mixture, which explains why the CO conversion increases with increasing CH fraction. The main process responsible for CH conversion is the reaction with OH radicals. The excellent energy efficiency can be explained by the non-equilibrium character of the plasma, in which the electrons mainly activate the gas molecules, and by the important role of the vibrational kinetics of CO . The results demonstrate that a gliding arc plasmatron is very promising for DRM.

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Section: Measured Conversion Energy Efficiencya Nd Energycostmentioning

confidence: 99%

Dry Reforming of Methane in a Gliding Arc Plasmatron: Towards a Better Understanding of the Plasma Chemistry

et al. 2017

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“…Combining plasma with a catalyst to form a hybrid plasma-catalysis reactor has the potential to enhance DRM performance. Currently, the two ways to combine plasma and catalyst are: to place a catalyst process after the plasma process, as in post-plasma catalysis (PPC) and the other is to place the catalyst inside the plasma reactor, as in in-plasma catalysis (IPC) [26]- [27]. In PPC, the catalyst may strongly react with the intermediate species that are generated by the plasma, enhancing catalytic performance [28].…”

Section: Ch4 + Co2 ↔ 2h2 + 2comentioning

confidence: 99%

Dry reforming of methane by combined spark discharge with a ferroelectric

Chung

Chang

2016

Energy Conversion and Management

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The increasing anthropogenic emission of greenhouse gases (GHGs) is causing global warming which is a matter of deep public concern. Dry reforming of methane (DRM) is an attractive means of reducing the emission of GHGs, because it can convert CO2 and CH4 into syngas. Non-thermal plasma has been investigated for use in DRM and the results demonstrate that plasma can convert CO2 and CH4 into syngas at a lower temperature than catalysis, but the specific energy is relatively high. Combining a catalyst with non-thermal plasma in hybrid system can produce various synergistic effects that reduce specific energy. In this work, BaZr0.05Ti0.95O3 (BZT) with a perovskite structure and ferroelectric property is packed into the plasma reactor to form a hybrid system. The syngas generation efficiency of BZT with a spark discharge reactor is investigated. The spark discharge reactor yields 49.4% conversion of CO2 and 79.0% conversion of CH4 and the BZT packed bed reactor yields 79.0% conversion of CO2 and 84.2% conversion of CH4. With respect to energy utilization, the BZT packed bed reactor has an specific energy of 0.218 MJ/mol, which is 18.7% lower than that of the spark discharge reactor without a ferroelectric (0.268 MJ/mol). Characterization of BZT reveals that the presence of BZT increases the charge density in the plasma reactor, favoring CO2 and CH4 dissociation. Also, SEM and XPS results 3 show that BZT is modified with plasma, resulting in a positive synergy between the plasma and the ferroelectric.

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“…6 CO 2 has stable chemical properties. Recently, several non-thermal plasma technologies, such as corona discharge, 16,17 gliding arc discharge, 18,19 glow discharge, 20,21 radio frequency discharge, 22,23 spark discharge, 24 microwave discharge, 25 and DBD [26][27][28][29][30][31][32][33] have been developed and used to activate CO 2 . 8 At present, the activation and decomposition or conversion of CO 2 have been extensively studied by many research groups via conventional thermal-chemical methods, 9 electrochemical reduction, 10 photochemical methods, 11,12 and biological methods.…”

Section: Introductionmentioning

confidence: 99%

“…13,14 However, traditional methods at high temperatures require a huge amount of energy because of the chemical stability of CO 2 molecule, 15 so activating and decomposing/converting CO 2 remain fairly difficult. Recently, several non-thermal plasma technologies, such as corona discharge, 16,17 gliding arc discharge, 18,19 glow discharge, 20,21 radio frequency discharge, 22,23 spark discharge, 24 microwave discharge, 25 and DBD [26][27][28][29][30][31][32][33] have been developed and used to activate CO 2 . Currently, the direct decomposition of CO 2 has become a research hotspot.…”

Section: Introductionmentioning

confidence: 99%

Direct decomposition of CO₂ using self‐cooling dielectric barrier discharge plasma

et al. 2017

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As a greenhouse gas, carbon dioxide (CO2) is one of the major causes of global warming. The effective control of CO2 emission has become a major global concern. To reduce CO2 emission in the environment and to maximize the use of CO2, a self‐cooling wire‐cylinder dielectric barrier discharge (DBD) plasma reactor was used to decompose CO2 at ambient conditions, and the results were compared with a common wire‐cylinder DBD reactor. Results indicated that in the said plasma reactor, circulating water could obviously improve discharge efficiency through taking away heat that was generated during plasma discharge process, and a more stable and homogeneous discharge was easier to obtain. The CO2 decomposition rate was 26.1% without using any catalysts and discharge mediums or modifying electrodes, and this value was significantly higher than that in the common wire‐cylinder DBD reactor (10.1% CO2 decomposition rate). Moreover, the CO2 decomposition rate could reach up to 35.8% when N2 was added (volume ratio VN2:VCnormalO2=9:1). © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Post-plasma catalytic oxidative CO2 reforming of methane over Ni-based catalysts

Cited by 20 publications

References 24 publications

Dry Reforming of Methane in a Gliding Arc Plasmatron: Towards a Better Understanding of the Plasma Chemistry

Dry Reforming of Methane in a Gliding Arc Plasmatron: Towards a Better Understanding of the Plasma Chemistry

Dry reforming of methane by combined spark discharge with a ferroelectric

Direct decomposition of CO₂ using self‐cooling dielectric barrier discharge plasma

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Post-plasma catalytic oxidative CO2 reforming of methane over Ni-based catalysts

Cited by 20 publications

References 24 publications

Dry Reforming of Methane in a Gliding Arc Plasmatron: Towards a Better Understanding of the Plasma Chemistry

Dry Reforming of Methane in a Gliding Arc Plasmatron: Towards a Better Understanding of the Plasma Chemistry

Dry reforming of methane by combined spark discharge with a ferroelectric

Direct decomposition of CO2 using self‐cooling dielectric barrier discharge plasma

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Product

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Direct decomposition of CO₂ using self‐cooling dielectric barrier discharge plasma