Oxidation of methane in a wide range of pressures and effect of inert gases

Sinev, M. Yu.; Tulenin, Yurii P.; Калашникова, О. В.; Bychkov, V. Yu.; Корчак, В. Н.

doi:10.1016/s0920-5861(96)00175-7

Cited by 13 publications

(6 citation statements)

References 9 publications

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“…Regarding the partial pressure of methane, high pressure is more likely to increase the solubility of methane in aqueous electrolytes, which leads to high oxidation current densities. The product selectivity is significantly affected upon adjusting the absolute and partial pressures of CH 4 , which can alter the intermediates of methane oxidation, binding energies of adsorbed oxidants, and relative surface coverage of the catalyst [46]. Nevertheless, only a few studies have reported on the electrochemical oxidation of methane under pressurized systems.…”

Section: Other Factors That Affect Methane Oxidationmentioning

confidence: 99%

Photoelectrochemical Conversion of Methane into Value-Added Products

2021

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Methane has been reported to be directly converted into value-added products through various methods. Among them, photoelectrochemical (PEC) methane conversion is considered an eco-friendly method because it utilizes solar light and is able to control the selectivity to different products by means of application of an external bias. Recently, some PEC methane conversion systems have been reported, but their performance efficiencies are relatively lower than those of other existing thermal, photocatalytic, and electrochemical systems. The detailed mechanism of methane activation is not clear at this stage. In this review, various catalytic materials and their roles in the reaction pathways are summarized and discussed. Furthermore, promising semiconductor materials, co-catalysts, and oxidants have also been proposed. Finally, direct and indirect pathways in the design of the PEC methane conversion system have been discussed.

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Section: Other Factors That Affect Methane Oxidationmentioning

confidence: 99%

Photoelectrochemical Conversion of Methane into Value-Added Products

2021

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“…18 Up to this point, the optimum C C. 19 Our new nanocatalyst reaction system is able to produce this yield with a reaction temperature 100 C lower. At this stage, it is imperative to elucidate if the high C þ 2 products yield is mainly due to a nanoeffect (nanosize of the catalyst particles) or other factors are involved.…”

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confidence: 90%

A new nano‐(2Li₂O/MgO) catalyst/porous alpha‐alumina composite for the oxidative coupling of methane reaction

Fallah

Falamaki

2009

AIChE Journal

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The present work discloses a new methodology for the production of detached nanorods of 2Li 2 O/MgO catalyst particles on the internal surface of a-Al 2 O 3 porous supports to be used as efficient catalysts for the oxidative coupling of methane reaction (OCM). The peculiarity of our preparatory recipe is the success in producing ''detached'' nanosized entities on the support surface. The performance of the new catalyst/support system for the OCM reaction has been evaluated using a special reactor assembly with cross flow of methane and oxygen gas streams. Under the optimum process conditions, the yield of C þ 2 product is 25% at an average reaction temperature of 750 C. Under the optimum conditions, the yield of ethylene reaches 8%. It is shown that the enhanced catalytic properties of the new catalyst/support composite may be attributed to nanoeffects.

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“…This determines automatically the nitrogen dilution at the value of 50%. The effect of inert gas on the OCM performance is relatively straightforward and known, and thus, it can be forecasted easily . Moreover, the effect of gas inert dilution on the hot spot formation has been considered in our analysis (see Figures and ).…”

Section: Parameter Analysis and Solution Strategymentioning

confidence: 99%

Methane Oxidative Coupling: Synthesis of Membrane Reactor Networks

Godini

Jašo

Xiao

et al. 2012

Ind. Eng. Chem. Res.

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In this work, the performance of the methane oxidative coupling process based on different alternative reactor structures including fixed-bed reactor, two different feeding-structures of porous packed bed membrane reactor, and different conceptual network combinations of them was analyzed in a comprehensive model-based study. In this context, a contour-based graphical visualizing method accompanied by multiscenario generation and examination approach was exploited so as to systematically screen out the high achievable process performances and the corresponding reactor network specifications. As performance indicators, several objective measures including the highest achievable values for yield, selectivity and methane conversion were applied over a high number of design scenarios. Thereby, several sets of structural and operating parameters were evaluated. The investigated parameters are temperature, membrane thicknesses, types of catalysts, amount of inert packing in the catalyst bed, the flow rate of oxygen-rich stream entering the reactor system (total methane to oxygen ratio), distribution of the oxygen rich stream through the reactor blocks (local methane to oxygen ratio), distribution of the total methane-rich feed stream into the reactor blocks, and the contact time represented by the reactor length. A high C2-yield of 31% and 88% C2-selectivity were observed at the same time, and thus, highlighting the performance potential of the reactor network. Moreover, the proposed method enables one to consider operating aspects such as hot spot formation during the analysis and screening procedure

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Oxidation of methane in a wide range of pressures and effect of inert gases

Cited by 13 publications

References 9 publications

Photoelectrochemical Conversion of Methane into Value-Added Products

Photoelectrochemical Conversion of Methane into Value-Added Products

A new nano‐(2Li₂O/MgO) catalyst/porous alpha‐alumina composite for the oxidative coupling of methane reaction

Methane Oxidative Coupling: Synthesis of Membrane Reactor Networks

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Oxidation of methane in a wide range of pressures and effect of inert gases

Cited by 13 publications

References 9 publications

Photoelectrochemical Conversion of Methane into Value-Added Products

Photoelectrochemical Conversion of Methane into Value-Added Products

A new nano‐(2Li2O/MgO) catalyst/porous alpha‐alumina composite for the oxidative coupling of methane reaction

Methane Oxidative Coupling: Synthesis of Membrane Reactor Networks

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Product

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A new nano‐(2Li₂O/MgO) catalyst/porous alpha‐alumina composite for the oxidative coupling of methane reaction