Theoretical study of partial oxidation of methane by non-equilibrium oxygen plasma to produce hydrogen rich syngas

Starik, A. M.; Kuleshov, P. S.; Loukhovitski, Boris I.; Титова, Н. С.

doi:10.1016/j.ijhydene.2015.06.066

Cited by 14 publications

(15 citation statements)

References 38 publications

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“…29 In addition, Starik et al have established the complete reaction mechanisms in CH 4 /O 2 and CH 4 / air. 30,31 Electron densities and electron temperatures calculated by the present model are slightly higher than the simulation results in Ref. 29, which should be attributed to the difference between the needle-plane discharge and the DBD.…”

Section: Simulation Modelcontrasting

confidence: 67%

Reaction pathways of producing and losing particles in atmospheric pressure methane nanosecond pulsed needle-plane discharge plasma

Zhao

Wang

et al. 2018

Physics of Plasmas

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In this work, a two-dimensional fluid model is built up to numerically investigate the reaction pathways of producing and losing particles in atmospheric pressure methane nanosecond pulsed needle-plane discharge plasma. The calculation results indicate that the electron collisions with CH4 are the key pathways to produce the neutral particles CH2 and CH as well as the charged particles e and CH3+. CH3, H2, H, C2H2, and C2H4 primarily result from the reactions between the neutral particles and CH4. The charge transfer reactions are the significant pathways to produce CH4+, C2H2+, and C2H4+. As to the neutral species CH and H and the charged species CH3+, the reactions between themselves and CH4 contribute to substantial losses of these particles. The ways responsible for losing CH3, H2, C2H2, and C2H4 are CH3 + H → CH4, H2 + CH → CH2 + H, CH4+ + C2H2 → C2H2+ + CH4, and CH4+ + C2H4 → C2H4+ + CH4, respectively. Both electrons and C2H4+ are consumed by the dissociative electron-ion recombination reactions. The essential reaction pathways of losing CH4+ and C2H2+ are the charge transfer reactions.

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Section: Simulation Modelcontrasting

confidence: 67%

Reaction pathways of producing and losing particles in atmospheric pressure methane nanosecond pulsed needle-plane discharge plasma

Zhao

Wang

et al. 2018

Physics of Plasmas

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“…The process of partial oxidation of the CH 4 −H 2 O mixture turns out to be more energetically advantageous. 23 Moreover, the addition of water vapor can increase the relative syngas yield. A similar effect was also observed after an addition of H 2 O to the fuel-rich H 2 S−O 2 mixture.…”

Section: Energy and Fuelsmentioning

confidence: 99%

Numerical Study of Syngas Production during Partial Oxidation of Sour Natural Gases upon Activation of Oxygen by an Electrical Discharge

2019

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The paper presents a numerical study of synthesis gas (H2 + CO) production during a low-temperature partial oxidation of sour natural gases in an atmospheric pressure plug-flow reactor upon activation of oxygen by an electrical discharge. Conversion features of sour gases with considerably different compositions are considered. One of them contains a noticeable amount of H2S and CO2, and the other consists mainly of methane. Calculations show that exposure of oxygen to an electrical discharge makes it possible to conduct the sour gas partial oxidation at a lower temperature (at least by 100 K compared to the thermal process) and to obtain the same yield of syngas. Specific energy required for production of 1 mol of syngas in this case can be 4.5–5 times lower than when using thermal conversion. The optimal fuel/oxygen equivalence ratio is φ ∼ 3. In this case, the maximum amount of syngas and minimal amount of byproducts form in the conversion products, and a lower energy supply is required per produced syngas. An addition of water vapor to sour gas does not lead to an increase in the syngas production during low-temperature plasma-assisted conversion of sour gases in the flow reactor.

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“…Other than attempts in meeting the objective to improve hydrogen yield, there have also been other engineered solutions to study POX presented in the literature for energy efficiency. One of them is the modeling study of POX on a methane-steam blend in a flow reactor of a given length conducted by Starik et al (2015). Hydrogen-rich syngas production was achieved through oxygen activation by electric discharge.…”

Section: Partial Oxidation Of Methanementioning

confidence: 99%

Hydrogen applications and research activities in its production routes through catalytic hydrocarbon conversion

Baharudin

Watson

2017

Reviews in Chemical Engineering

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AbstractThe statistical information on the share of hydrogen sector-wise consumption indicates that 95% of the total consumption is utilized in ammonia synthesis, petroleum refining processes and methanol production. We discuss how hydrogen is used in these processes and in several smaller-scale manufacturing industries. We also present the trend of hydrogen used as fuel, and as an energy carrier in fuel cells for generating electricity, powering hydrogen vehicles, as well as in aerospace applications. Natural gas caters for approximately half of the total hydrogen production resources. Therefore, the scope is emphasized on relatively recent developments in research activities related to the conventional catalytic hydrocarbon processing technologies for the production of hydrogen derived from natural gas (methane), which are steam methane reforming, partial oxidation of methane and autothermal reforming. Hydrocarbon decomposition is included due to its potential to be industrialized in the future, and its benefits of producing clean hydrogen without emissions of greenhouse gases and generating carbon nanofibers or nanotubes as by-products that have the potential in various emerging applications. Attention is given to the efforts toward achieving hydrocarbon conversion improvements, energy savings through thermally efficient operation and reduced operational costs through minimization or elimination of coke formation in the catalytic processes.

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Theoretical study of partial oxidation of methane by non-equilibrium oxygen plasma to produce hydrogen rich syngas

Cited by 14 publications

References 38 publications

Reaction pathways of producing and losing particles in atmospheric pressure methane nanosecond pulsed needle-plane discharge plasma

Reaction pathways of producing and losing particles in atmospheric pressure methane nanosecond pulsed needle-plane discharge plasma

Numerical Study of Syngas Production during Partial Oxidation of Sour Natural Gases upon Activation of Oxygen by an Electrical Discharge

Hydrogen applications and research activities in its production routes through catalytic hydrocarbon conversion

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