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York, Andrew P. E.; Xiao, Tiancun; Green, Malcolm L. H.

doi:10.1023/a:1023552709642

Cited by 477 publications

(139 citation statements)

References 83 publications

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“…Computational fluid dynamics modeling of the catalytic partial oxidation process is complex [15,16], especially when the role of reaction pathway needs to be determined [66]. Therefore, detailed reaction mechanisms are included in the model.…”

Section: Reaction Mechanismsmentioning

confidence: 99%

“…Processes 2018, 6, 83 2 of 24 Significant progress has been made recently in the understanding of the mechanism of this reaction [15,16]. The reaction proceeds at a lower temperature than the gas-phase partial oxidation route [17][18][19][20], thus offering many advantages such as a reduction of undesired by-products and the ability to control the process temperature [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…However, microfabrication methods have the potential to realize reactor designs that combine excellent thermal uniformity, enhanced transport rates, and low-pressure drop for a catalytic partial oxidation process [54,55]. The intrinsic kinetics of these partial oxidation processes are typically very fast, and thus the realization of this process technology will require continued advances in the development of microreactors [15,16]. The small dimensions associated with these reactors can effectively inhibit the gas-phase reaction occurring during a catalytic partial oxidation process [56].…”

Section: Introductionmentioning

confidence: 99%

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RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Chen

Song

2018

Processes

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This paper addresses the issues related to the favorable operating conditions for the small-scale production of synthesis gas from the catalytic partial oxidation of methane over rhodium. Numerical simulations were performed by means of computational fluid dynamics to explore the key factors influencing the yield of synthesis gas. The effect of mixture composition, pressure, preheating temperature, and reactor dimension was evaluated to identify conditions that favor a high yield of synthesis gas. The relative importance of heterogeneous and homogenous reaction pathways in determining the distribution of reaction products was investigated. The results indicated that there is competition between the partial and total oxidation reactions occurring in the system, which is responsible for the distribution of reaction products. The contribution of heterogeneous and homogeneous reaction pathways depends upon process conditions. The temperature and pressure play an important role in determining the fuel conversion and the synthesis gas yield. Undesired homogeneous reactions are favored in large reactors, and at high temperatures and pressures, whereas desired heterogeneous reactions are favored in small reactors, and at low temperatures and pressures. At atmospheric pressure, the selectivity to synthesis gas is higher than 98% at preheating temperatures above 900 K when oxygen is used as the oxidant. At pressures below 1.0 MPa, alteration of the dimension in the range of 0.3 and 1.5 mm does not result in significant difference in reactor performance, if made at constant inlet flow velocities. Air shows great promise as the oxidant, especially at industrially relevant pressure 3.0 MPa, thereby effectively inhibiting the initiation of undesired homogeneous reactions.

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Section: Reaction Mechanismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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RETRACTED: Computational Fluid Dynamics Modeling of the Catalytic Partial Oxidation of Methane in Microchannel Reactors for Synthesis Gas Production

Chen

Song

2018

Processes

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“…Hiro-aki NISHIMOTO 1) , Na-oki IKENAGA 1) , Kiyoharu NAKAGAWA 1), 2), 3) , Toru KONISHI 1) , and Toshimitsu SUZUKI 1) * , 2) dia cannot form complex oxides with the loaded metal or metal oxide, or may not have strong interactions with loaded species. Therefore, the characteristic features of the loaded species will be preserved.…”

Section: Partial Oxidation Of Methane To Synthesis Gas Over Oxidized mentioning

confidence: 99%

“…Partial oxidation of methane to synthesis gas is an energy saving exothermic process that is currently attracting much attention, after the re-evaluation by Aschcroft et al 1) , and several review articles have summarized the research in this field 2), 3) . Two reaction courses have been proposed: direct conversion of methane to hydrogen and carbon monoxide on the catalyst surface (reaction 1), and sequential reaction paths involving complete oxidation (reaction 4) followed by steam and carbon dioxide reforming (reactions 5 and 6) with unreacted methane 4) .…”

Section: Introductionmentioning

confidence: 99%

Partial Oxidation of Methane to Synthesis Gas over Oxidized Diamond Supported Catalysts—Catalytic Behavior of Nickel and Cobalt Species—

Nishimoto

Ikenaga

Nakagawa

et al. 2005

J. Jpn. Petrol. Inst.

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Characterization of nickel and cobalt catalysts supported on oxidized diamond (O-dia) in the partial oxidation of methane to synthesis gas was carried out by X-ray photoelectron spectroscopy (XPS) and the transient response pulse technique. Carbon deposition occurred on nickel/O-dia, but not on cobalt/O-dia catalyst at 873 K throughout prolonged reaction. XPS analyses observed partially reduced nickel oxides on nickel/O-dia catalyst after reaction with methane/oxygen (5/1) at 873 K. Co(0), partially reduced cobalt oxide, and Co(III) oxide phases were found on cobalt/O-dia catalyst after reaction at 873 K. Transient response methane/oxygen (2/1) pulse studies found a large amount of hydrogen production occurred immediately at 873 K over the nickel/O-dia catalyst. However, a very small amount of hydrogen production was seen over the cobalt/O-dia catalyst, indicating that nickel and cobalt species supported on O-dia exhibited different behavior. Transient response of the catalyst bed temperature found that endothermic reaction occurred on the nickel/O-dia catalyst at 873 K, but exothermic reaction proceeded on the cobalt/O-dia catalyst. These results suggest that methane decomposition to hydrogen is the primary reaction path over nickel/O-dia catalyst, whereas complete oxidation is the primary reaction followed by steam and carbon dioxide reforming to produce synthesis gas over the cobalt/O-dia catalyst.

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