Partial oxidation of methane by pulsed corona discharges

Hoeben, Wflm Wilfred; Boekhoven, W Willem; Beckers, Fjcm Frank; Heesch, van Ejm Bert; Pemen, Ajm Guus

doi:10.1088/0022-3727/47/35/355202

Cited by 20 publications

(6 citation statements)

References 42 publications

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“…The POX of CH 4 has been investigated in a variety of plasma reactors. ,,− Among these, the dielectric barrier discharge (DBD) reactor is most common, as it can be easily operated at atmospheric pressure and scaled up for industrial use . Some selectivity toward organic oxygenates (CH 3 OH, CH 2 O, HCOOH, etc.)…”

Section: Introductionmentioning

confidence: 99%

Plasma-Catalytic Partial Oxidation of Methane on Pt(111): A Microkinetic Study on the Role of Different Plasma Species

2021

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We use microkinetic modeling to examine the potential of plasma-catalytic partial oxidation (POX) of CH 4 as a promising new approach to produce oxygenates. We study how different plasma species affect POX of CH 4 on the Pt(111) surface, and we discuss the associated kinetic and mechanistic changes. We discuss the effect of vibrationally excited CH 4 and O 2 , as well as plasma-generated radicals and stable intermediates. Our results show that vibrational excitation enhances the turnover frequency (TOF) of catalytic CH 4 dissociation and has good potential for improving the selectivities toward CH 3 OH, HCOOH, and C 2 hydrocarbons. Nevertheless, when also considering plasma-generated radicals, we find that these species mainly govern the surface chemistry. Additionally, we find that plasma-generated radicals and stable intermediates enhance the TOFs of CO x and oxygenates, increase the selectivity toward oxygenates, and make the formation of HCOOH more significant on Pt(111). We also briefly illustrate the potential impact of Eley− Rideal reactions that involve plasma-generated radicals. Finally, we reveal how various radicals affect the catalyst surface chemistry and we link this to the formation of different products. This allows us to make suggestions on how the plasma composition should be altered to improve the formation of desired products.

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Section: Introductionmentioning

confidence: 99%

Plasma-Catalytic Partial Oxidation of Methane on Pt(111): A Microkinetic Study on the Role of Different Plasma Species

2021

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“…Ранее конверсия метана в коронном разряде исследовалась в работе [Hoeben et al, 2014] Измерение отклика масс-спектрометра производилось на массе 33 а.е.м., соответствующей протонированной молекуле метанола.…”

Section: особенности конверсии/ионизация метана в коронном разрядеunclassified

The new approach to determination of the combined isotopic composition of methane for its genetic characterization

Makas

Kudryavtsev

Troshkov

2023

Russian Journal of geophysical technologies

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A new approach to mass-spectrometric determination of the combined isotopic composition of methane has been put forward. The approach is based on the preliminary on-line conversion of methane to methanol in corona discharge and selective chemical ionization. The approach provides means to lower requirements for equipment, consumables, and operation conditions and offers a challenge to develop a new field method.

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“…Now, regarding the progress of oxidation, the oxidation of methane to CO 2 and H 2 O features the highest Gibbs freeenergy change following the more favorable reaction rate compared to the others. Thus, stopping the oxidation process at intermediate oxygen-functional hydrocarbons is difficult in thermal catalytic MPOM, while in the case of NTP, plasma can provide other less energetic pathways to overcome high-reaction activation energy barriers, which results in the enhancement of the reaction rates involved [17]. Various non-thermal plasma discharges such as the microwave plasma discharge [12], dielectric barrier discharge (DBD) [15,18,19], corona discharge [20] and gliding arc discharge [21] have been tested.…”

Section: Introductionmentioning

confidence: 99%

NTP-assisted partial oxidation of methane to methanol: effect of plasma parameters on glass-packed DBD

Chawdhury¹,

Ray²,

Nepak³

et al. 2018

J. Phys. D: Appl. Phys.

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The partial oxidation of methane to methanol was performed in a non-thermal dielectric barrier discharge (DBD) plasma reactor. The influence of various parameters on the conversion of methane, product selectivity and energy efficiency has been studied. Typical results indicate that the discharge gap has a marked influence on methane conversion and product distribution. The best selectivity to CH 3 OH and HCHO was ~25% and ~17% at a discharge gap of 4.5 and 5 mm, respectively, and the highest corresponding energy efficiency was ~0.9 mmol kJ −1 . At a later state, the DBD reactor was operated under a packed-bed configuration by integrating the discharge gap with zero surface glass materials having different geometry: glass beads (spherical), glass capillary (hollow cylindrical) and glass wool (spongy honeycomb) to understand the influence of material geometry on the plasma discharge and finally on the formation of products such as CH 3 OH, HCHO, CO, CO 2 , H 2 , C 2 H 6 . Typical results indicated that the morphology of the packing materials affects the discharge characteristics, and hence the product distribution. It is concluded that the better performance of the packed-bed plasma reactor is due to the improved electrical field strength. Among the geometries studied, glass wool showed the highest CH 4 conversion due to the improved field strength/surface corona, whereas glass-bead packing improved the CH 3 OH selectivity to ~32%.

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Partial oxidation of methane by pulsed corona discharges

Cited by 20 publications

References 42 publications

Plasma-Catalytic Partial Oxidation of Methane on Pt(111): A Microkinetic Study on the Role of Different Plasma Species

Plasma-Catalytic Partial Oxidation of Methane on Pt(111): A Microkinetic Study on the Role of Different Plasma Species

The new approach to determination of the combined isotopic composition of methane for its genetic characterization

NTP-assisted partial oxidation of methane to methanol: effect of plasma parameters on glass-packed DBD

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