Comparison of dry reforming of methane in low temperature hybrid plasma-catalytic corona with thermal catalytic reactor over Ni/γ-Al2O3

Aziznia, Amin; Bozorgzadeh, Hamid Reza; Seyed-Matin, Naser; Baghalha, Morteza; Mohamadalizadeh, Ali

doi:10.1016/s1003-9953(11)60392-7

Cited by 60 publications

(28 citation statements)

References 42 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. In corona discharges, maximum conversionsb etween 10 and 90 %h ave been reached, with energy costs between 4 and 100 eV per molecule.…”

Section: Resultsmentioning

confidence: 99%

“…[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%

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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: Resultsmentioning

confidence: 99%

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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“…Due to the high temperature, other side reactions apart from the dry reforming reaction can occur, especially those that could increase the carbon coke formation on the catalyst such as methane cracking and the Boudouard reaction. A study on dry reforming of methane over a Ni/ -Al2O3 catalyst in a fixed bed continuous flow quartz reactor and direct current corona discharge found an increase selectivity for CO and decreased carbon formation on the catalyst surface [13]. Dry methane reforming is not only affected by temperature, but also the CH4/CO2 ratio, mass to flow ratio, catalyst selection and reaction mixture [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis-catalytic dry (CO 2 ) reforming of waste plastics for syngas production: Influence of process parameters

Saad

Williams

2017

Fuel

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Abstract:Catalytic dry (CO2) reforming of waste plastics was carried out in a two stage, pyrolysis-catalytic reforming fixed bed reactor to optimise the production of syngas (H2 + CO). The effects of changing the process parameters of, catalyst preparation conditions, catalyst temperature, CO2 input rate and catalyst:plastic ratio were investigated. The plastics used was a mixture of plastics simulating that found in municipal solid waste and the catalyst used was Ni-Co-Al2O3. The results showed that changing each of the process conditions investigated, all significantly influenced syngas production. An increase of 17 % of syngas production was achieved from the experiment with the catalyst prepared by rising-pH technique compared to preparation via the impregnation method. The optimum syngas production of 148.6 mmolsyngas g -1 swp was attained at the catalytic dry reforming temperature of 800 °C and catalyst:plastic ratio of 0.5. The increase of CO2 input rate promoted a higher yield of syngas.

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“…More recently, CO 2 (dry) methane reforming using non-thermal plasma has attracted keen attention [6] as an important part of carbon capture and utilization (CCU) technology. Similar to SMR, low-temperature CO 2 methane reforming is an important subject of research; DBDcatalyst hybrid reaction [32][33][34][35][36], corona discharge [37], pulsed DC [38], and DBD [39] have been studied. Catalyst preparation using non-thermal plasma is also an active field of research [40][41][42][43][44][45][46].…”

Section: Plasma Sources and Fuels Processingmentioning

confidence: 99%

Non-thermal plasma catalysis of methane: Principles, energy efficiency, and applications

2013

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Comparison of dry reforming of methane in low temperature hybrid plasma-catalytic corona with thermal catalytic reactor over Ni/γ-Al2O3

Cited by 60 publications

References 42 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

Pyrolysis-catalytic dry (CO 2 ) reforming of waste plastics for syngas production: Influence of process parameters

Non-thermal plasma catalysis of methane: Principles, energy efficiency, and applications

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