Experimental and Modeling Study of the Selective Homogeneous Gas Phase Oxidation of Methane to Methanol

Lødeng, Rune; Lindvåg, O.A.; Søraker, P.; Roterud, P. T.; Onsager, O.T.

doi:10.1021/ie00043a006

Cited by 35 publications

(18 citation statements)

References 16 publications

(32 reference statements)

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“…The CH 3 OH yield in most catalytic experiments has been reported to be below 2%, which is far removed from economical needs. [20][21][22][23] The application of dielectric-barrier discharge-plasmas (silent-discharge-plasmas) has been proposed as a new technology for CH 3 OH synthesis. 19,24 In the present study, the partial oxidation of CH 4 with N 2 O to CH 3 OH and HCHO was explored in a nonthermal dielectric-barrier discharge systems under mild conditions.…”

Section: Introductionmentioning

confidence: 99%

Selective Oxidation of Methane to Methanol and Formaldehyde with Nitrous Oxide in a Dielectric-Barrier Discharge−Plasma Reactor

et al. 2001

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The partial oxidation of CH 4 with N 2 O in Ar has been investigated at atmospheric pressure in a dielectricbarrier (silent) discharge plasma induced by low input power in a range from 0.27 to 7.71 Wh(Ncm 3 ) -1 . In an Ar stream, about 10% of the combined yield of CH 3 OH and HCHO and 40% of the selectivity to these products were achieved, with CO being the other major product. Low power favored selectivities to unstable partial oxidized products and supressed further decomposition to carbon oxides and carbonaceous deposits on the electrode surface. Kinetic and spectroscopic observations indicated that Ar carrier gas played an important role in the highly selective oxidation of CH 4 to CH 3 OH and HCHO via energy transfer from excited-state Ar species to the reactant molecules under the mild conditions examined.

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Section: Introductionmentioning

confidence: 99%

Selective Oxidation of Methane to Methanol and Formaldehyde with Nitrous Oxide in a Dielectric-Barrier Discharge−Plasma Reactor

et al. 2001

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“…CH 4 + CH 3 O = CH 3 + CH 3 OH (Lodeng, 1995) (12) (Lodeng, 1995) (13) Lodeng, 1995) (14) Lodeng, 1995) …”

Section: Specific Energymentioning

confidence: 99%

Direct Conversion of Methane into Methanol and Formaldehyde in an RF Plasma Environment II: Effects of Experimental Parameters

Wang

Tsai

Shih

et al. 2005

Aerosol Air Qual. Res.

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To provide information on the conversion of methane in a non-catalyzed radio-frequency (RF) plasma system into valuable chemicals, such as HCHO, CH 3 OH, C 2 H 6 , C 2 H 4 and C 2 H 2 , an experiment was conducted to convert methane directly into methanol and formaldehyde. The effects of experimental parameters-specific energy (power or flow variation) and CH 4 and O 2 feeding concentrations-were examined. Carbon-based by-products generated in a CH 4 /O 2 /Ar RF plasma system included CO, CO 2 , HCHO, CH 3 OH, C 2 H 6 , C 2 H 4 and C 2 H 2 . The methane conversion ratio increased as the feeding concentration of O 2 and the specific energy was increased, but decreased with feeding of CH 4 . Increasing power in the RF plasma system did not favor the partial oxidation of CH 4 toward CH 3 OH and HCHO, but did favor the production of C 2 -hydrocarbons (C 2 H 6 , C 2 H 4 and C 2 H 2 ), CO, and CO 2 . The CH 4 feeding concentration of under 15% or an O 2 content of under 10% favored the formation of CH 3 OH and HCHO. CO concentration decreased as the feeding concentration of CH 4 increased, and increased as the feeding concentration of O 2 increased. The yield of CH 3 OH was less than 1%. No carbon black or deposition was observed. Further research will seek to increase the yield of CH 3 OH and HCHO by adding catalysts to the system.

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“…They demonstrated that pressures in excess of 180 bar, reduced the yield of methanol. Lodeng et al 10 investigated the oxidation of methane to methanol in a homogeneous system and observed that with 2.6-4.4% oxygen in feed, 40-60 bar pressure and 450-550°C, methane conversion was 1.2-2.6%. Hunter et al 11 applied a tubular reactor packed with SnO 2 as the reaction catalyst.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Direct Conversion of Methane to Methanol

Sohrabi¹,

Vafajoo

2009

J. Chil. Chem. Soc.

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The selective oxidation of methane to methanol has been investigated in a packed bed reactor applying V2O5/SiO2 as the reaction catalyst. The effects of certain pertinent parameters of the system such as temperature, pressure and gas hourly space velocity (GHSV) on the conversion of methane and selectivity of the products have been investigated. It has been observed that by increasing the conversion of methane, the selectivity of both CO and formaldehyde is enhanced, while, that of methanol and CO2 is reduced. This could be due to the formation of certain by products such as formaldehyde as the result of further oxidation of methanol. Temperature was found to have the highest effect on the rate of reaction. A simple kinetic model has been devised for this process and the kinetic parameters have been determined as functions of temperature. The data predicted from the model have been correlated with those determined experimentally. The mean absolute deviation between the two sets of data was ca 7%.

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Experimental and Modeling Study of the Selective Homogeneous Gas Phase Oxidation of Methane to Methanol

Cited by 35 publications

References 16 publications

Selective Oxidation of Methane to Methanol and Formaldehyde with Nitrous Oxide in a Dielectric-Barrier Discharge−Plasma Reactor

Selective Oxidation of Methane to Methanol and Formaldehyde with Nitrous Oxide in a Dielectric-Barrier Discharge−Plasma Reactor

Direct Conversion of Methane into Methanol and Formaldehyde in an RF Plasma Environment II: Effects of Experimental Parameters

A Study on the Direct Conversion of Methane to Methanol

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