Methane decomposition under a corona discharge to generate CO -free hydrogen

Aleknaviciute, I.; Karayiannis, Tassos G.; Collins, M. W.; Xanthos, C.

doi:10.1016/j.energy.2013.06.059

Cited by 35 publications

(9 citation statements)

References 57 publications

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“…Aleknaviciute et al [110] worked on CH4reforming to H2 at atmospheric pressure and in presence of Ar (CH4:Ar=1:1). They studied a pin-to-plate plasma configuration under corona regime.…”

Section: Corona and Sparkmentioning

confidence: 99%

“…Moreover, they observed that bigger discharge gaps favour H2 production. The effect of discharge gap had also been previously studied but a different interpretation is given in Aleknaviciute et al [110]; specifically, whilst most of the researchers claimed that the reason of CH4 conversion increase when increasing the discharge gap at constant flow rate is the longer residence time, Aleknaviciute et al [110] supported Kado's [111] explanation, according to which the breakdown voltage is affected by the discharge gap and the breakdown voltage is the dominant factor rather than the residence time. Particularly, they claimed that the higher breakdown voltage, which is needed as the gap length increases, shifts the electrons energy distribution to higher energy values, which…”

Section: Corona and Sparkmentioning

confidence: 99%

See 1 more Smart Citation

The panorama of plasma-assisted non-oxidative methane reforming

Scapinello

Delikonstantis

Stefanidis

2017

Chemical Engineering and Processing: Process Intensification

152

151

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Methane is an important raw material for fuel and commodity chemicals production. Energyintensive steam methane catalytic reforming in gas-fired furnaces is the main industrial process for methane conversion to synthesis gas and further to other chemicals. Methane conversion by means of non-thermal plasma technologies has attracted attention in the last years, as no pre-heating of the feedstream at high temperatures is needed. Electric energy is consumed in producing energetic electrons for molecule bonds breaking, instead of gas heating, thereby overcoming the disadvantages of high operational temperatures. In this work, after introducing plasma classification and plasma chemistry, a comprehensive review of literature papers on non-thermal plasma-assisted methane coupling in the period 2010-2016 is presented and the best results that have been obtained with all different kinds of non-thermal plasma techniques are reported. Finally, as the energy cost is the main cost driver of the process after the raw material cost, comparison among all plasma techniques used for methane coupling is performed in terms of specific energy requirement to crack a mole of methane (SER, kJ/molCH4), efficiency (η %) and energy requirement to produce a mole of target product (ER, either kJ/molC2H2 or kJ/molC2H4). This is followed by a comparison between plasma-driven and thermal energy-driven methane coupling.

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“…Aleknaviciute et al [110] worked on CH4reforming to H2 at atmospheric pressure and in presence of Ar (CH4:Ar=1:1). They studied a pin-to-plate plasma configuration under corona regime.…”

Section: Corona and Sparkmentioning

confidence: 99%

Section: Corona and Sparkmentioning

confidence: 99%

The panorama of plasma-assisted non-oxidative methane reforming

Scapinello

Delikonstantis

Stefanidis

2017

Chemical Engineering and Processing: Process Intensification

152

151

View full text Add to dashboard Cite

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“…The literature confirms that inclusion of a small amount of oxygen in the reactive stream suppresses the formation of carbon deposits in similar processes. 28 As illustrated below in Figure 5, after adding 10 mol % air in the reactive stream, the glow discharge can steadily last for at least 120 min as indicated by the lighter yellow section of the orange bar, and the yield toward C 2+ products and lower heating value (LHV) energy efficiency are still kept at the same level.…”

Section: Resultsmentioning

confidence: 97%

Methane Coupling to Ethylene and Longer-Chain Hydrocarbons by Low-Energy Electrical Discharge in Microstructured Reactors

Kreider

Reddick

et al. 2021

Ind. Eng. Chem. Res.

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The direct conversion of methane to longer hydrocarbons, including alkanes and alkenes (i.e., olefins), is achieved with a high energy and atom efficiency through the use of low-energy, nonthermal electric glow discharge plasmas acting on CH 4 / O 2 /N 2 and CH 4 /CO 2 /N 2 in a microstructured reactor. The process is neither dependent on limited lifetime catalysts nor consumable chemicals, enabling continuous operation over long periods. Similarly, it is carried out at atmospheric pressure and ambient temperature, thus simplifying process implementation. Because it does not require high temperatures, energy is not wasted producing sensible heat, allowing for high process energy efficiencies. Also, because it is designed in easy to number up modules, it can be readily scaled to the needs of the methane resource available. The effects of CH 4 /O 2 and CH 4 /CO 2 ratios, electric discharge current, flow rate, gap distance between electrodes, and the number of discharges on product distribution and energy efficiency were studied. Dependent on conditions, energy efficiencies in the order of 80%, methane conversion up to 75%, and carbon selectivity toward C 2+ products up to 90% can be achieved for these processes. The performance of this plasma-chemical microreaction system uses around two-thirds of the energy of that for the current commercial ethylene production process and is thus proposed as a promising alternative for industrial applications including valorization of stranded methane sources.

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“…A corona-based plasma reforming unit has been used to convert methane and propane into CO x -free hydrogen [41,42]. Argon was used to provide additional electrons and photons for higher reaction rates.…”

Section: Corona Dischargementioning

confidence: 99%