Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Oxidative methane

The proton NMR spectrum shows chem shifts of 6.93 5.957- (Ref 1). Photolysis with a Hg arc lamp gives N, nitrous oxide, methane, and ethane (Ref 2). It was found to produce colon and rectal carcinomas in rats after oral administration at 12mg/kg weekly, induction period 235 days (Ref 3)... [Pg.86]

Thermal Decomposition. The therm decompn was studied betw 380 and 430° and found to be homogeneous and apparently 1st order. The products were complex and included nitric oxide, methane, carbon monoxide, and w plus small amts of ethane, ethylene, and nitrous oxide (Ref 23)... [Pg.89]

Organisms which oxidize methane exclusively and use this substrate as a source of carbon and energy appear to be restricted to Methanomonas sp. The latter is a strict aerobe which presumably contains cytochromes (67). [Pg.158]

Recent estimates indicate that the level of carbon dioxide in the atmosphere has increased by a third since the beginning of the industrial age, and that it contributes significantly to global warming. Other major contributors include methane, tropospheric ozone, and nitrous oxide. Methane is the principal component of natural gas, but it is also produced by other sources such as rice paddies and farm animals. Tropospheric ozone is generated naturally and by the sunlight-... [Pg.150]

Ni species in Ni—Cr—FeOx were present as Ni—Fe alloys after the reduction with methane and as Ni metal crystallites after oxidation with steam. Kodama et al. [54] demonstrated the production of syngas by oxidizing methane with Ni039Fe261O4/ZrO2 at 800-900°C as follows ... [Pg.62]

Electropox [Electrochemical partial oxidation] Also called Pox. An electrochemical process for oxidizing methane to syngas. It combines the partial oxidation and steam reforming of methane with oxygen separation in a single stage. Invented in 1988 by T. J. Mazanec at BP Chemicals. An industrial-academic consortium to develop the process was formed in 1997. [Pg.97]

Gutehoffnungshiitte [Named after the company of that name in Oberhausen, Germany, now a subsidiary of MAN A.G., Munich] A process for oxidizing methane to formaldehyde, using nitrogen oxides as the oxidant and sodium borate as the catalyst. Operated at atmospheric pressure and 620°C. Developed in Germany during World War II and improved by R Nashan in 1951. [Pg.120]

Selox [Selective oxidation] A process for selectively oxidizing methane to syngas using a proprietary heterogeneous catalyst at temperatures up to 1,000°C. Developed on a laboratory scale by TRW, CA, partly financed by the U.S. Department of Energy in 1983. [Pg.241]

Homogeneous catalysts have been reported, which can oxidize methane to other functionalized products via C-H activation, involving an electrophilic substitution process. The conversion of methane into methyl bisulfate, using a platinum catalyst, in sulfuric acid, has been described. The researchers found that a bipyrimidine-based ligand could both stabilize and solubilize the cationic platinum species under the strong acidic conditions and TONs of >500 were observed (Equation (5)).13... [Pg.104]

Another way to eliminate the oxygen plant is to react a metal oxide with methane to yield the synthesis gas in a fluidized-bed reactor (83-86). Experiments have shown that copper oxide readily oxidizes methane to carbon monoxide and hydrogen with high selectivity at a temperature of about 1200 K and that the reduced CuO can be reoxidized with air. Lewis et al. (83-86)... [Pg.333]

Oremland et al. [136] subsequently demonstrated that methane-oxidizing bacteria also had the capacity to co-oxidize methyl bromide by methane monooxygenase produced during the oxidation of methane to methanol. They also showed that methanotrophic soils that had a high capacity to oxidize methane degraded14C-labeled methyl bromide to 14C02. [Pg.390]

Oxidative Methane Coupling Nonporous Zr-Y-Ti-based membranes Nonporous PbO/MgO membranes... [Pg.137]

Oxidative methane coupling. MngCa r OjK catalyst placed in the pores of the tube. Ethylene and ethane synthesis from methane. Li/MgO (3 wt. % Li) catalyst placed in the pores of the tube. T 850 C. Conversion 30%. Selectivity to Cj products 60% T 700-750°C. Conversion 40%. Selectivity to Cj products 55%. ... [Pg.140]

Porous alumina tube externally coated with a MgO/PbO dense film (in double pipe configuration), tube thickness 2.5 mm, outer diameter 4 mm, mean pore diameter 50 nm, active film-coated length 30 mm. Feed enters the reactor at shell side, oxygen at tube side. Oxidative methane coupling, PbO/MgO catalyst in thin film form (see previous column). r-750X,Pr ed 1 bar. Conversion of methane <2%. Selectivity to Cj products > 97%. Omata et al. (1989). The methane conversion is not given. Reported results are calculated from permeability data. [Pg.140]

One example of membrane reactors is oxidation, in which oxygen from one phase diffuses from one side of an oxygen-permeable membrane to react with a fuel on the other side of the membrane. This avoids a high concentration of O2 on the fuel side, which would be flammable. A catalyst on the fuel side of the membrane oxidizes the fuel to partial oxidation products. One important process using a membrane reactor is the reaction to oxidize methane to form syngas,... [Pg.485]

Oxygen has major uses in the chemical industry too. It is used to oxidize methane, ethylene, and other hydrocarbons. Oxidation of methane produces synthesis gas. Ethylene oxidation yields products such as ethylene oxide, acetaldehyde, and acetic acid. Oxygen also is used in making many commercial inorganic compounds including various metal oxides, oxoacids, and 0x0-salts. [Pg.675]

Chan and Wilson [52] tried to oxidize methane to methanol by oxygen on TMPcY and TMTPPY (TM= Co, Fe, Ru, Mn) in the temperature range of 548 K to 773 K. Only RuPcY, CoTPPY and MnTPPY are active towards alcohol formation, yields up to 0.5% being claimed (Table 5). All other catalysts give combustion of methane to carbon dioxide and water. In an attempt to repeat these experiments, the present authors only observed CO, CO2 and H2O formation, and rapid autoxidation of the catalyst. [Pg.242]

The U.S. Department of Energy s Office of Technology Development has sponsored full-scale environmental restoration technology demonstrations since 1990. The Savannah River Site Integrated Demonstration focuses on the bioremediation of groundwater contaminated by chlorinated solvents. Several laboratories, including the Savannah River site, have demonstrated the ability of methanotrophic bacteria (i.e., those that oxidize methane) found in soil, sediment, and aqueous material, to completely degrade or mineralize chlorinated solvents. [Pg.1130]

Table I. Oxidative Methane Coupling over Praseodymium Compounds... Table I. Oxidative Methane Coupling over Praseodymium Compounds...
A mercury-catalyzed, high-yield system oxidizes methane by cone. H2SO4 to produce methanol 66... [Pg.433]


See other pages where Oxidative methane is mentioned: [Pg.86]    [Pg.493]    [Pg.152]    [Pg.504]    [Pg.71]    [Pg.37]    [Pg.321]    [Pg.54]    [Pg.55]    [Pg.519]    [Pg.23]    [Pg.262]    [Pg.262]    [Pg.372]    [Pg.142]    [Pg.194]    [Pg.197]    [Pg.459]    [Pg.533]    [Pg.92]    [Pg.323]    [Pg.242]    [Pg.338]    [Pg.40]    [Pg.570]    [Pg.112]    [Pg.7]   
See also in sourсe #XX -- [ Pg.177 , Pg.433 ]




SEARCH



Acetic Acid Production by Ethane and Methane Oxidation

Aerobic microbial oxidation of sulphide and methane

Aerobic oxidation of methane

Aerobic oxidation, methane

Alkali-promoted metal oxide , methane

Alkali-promoted metal oxide , methane activation studies

Anaerobic Oxidation of Methane (AOM)

Anaerobic oxidation of methane

Atmosphere methane oxidation cycle

Bacteria methane oxidation

Biological methane oxidation

Biological oxidation of methane

Carbon dioxide from methane oxidation

Carbon oxides, methanation

Catalysts for partial oxidation of methane

Catalytic methane oxidation

Catalytic oxidative coupling methane

Catalytic partial oxidation of methane

Catalytica methane oxidation

Catalytically active sites oxidative coupling, methane

Ceramic methane, oxidative coupling

Complete Oxidation of Methane

Copper oxide reduction with methane

Coupling methane, oxidative

Direct methane oxidation to methanol under pressure

Direct oxidation of methane-to-methanol

Direct pressurized oxidation of methane to methanol with hydrogen peroxide

Fischer methane oxidation

Fuel methane, direct partial oxidation

Gas Hydrate Carbonate Formation and Anaerobic Oxidation of Methane

Heterogeneous Processes in the Partial Oxidation of Methane to Oxygenates

Heterogeneous catalysis methane oxidative coupling

High-temperature oxidation of natural methane with hydrogen peroxide

Hydrocarbon Reforming 1 Micro Structured Monoliths for Partial Methane Oxidation

Hydrocarbon Reforming 2 Partial Methane Oxidation Heat Exchanger Reactor

Hydrocarbon oxidation methane

Hydrogen methane oxidation

Indirect partial oxidation of methane in a catalytic tubular reactor

Iridium methane oxidative addition

Kinetics of methane oxidation

Membrane reactors, methane partial oxidation

Metal Oxides methane oxidation

Methan oxidation, formation condensation

Methan oxidation, formation condensation products

Methanal oxidation

Methanal oxidation

Methanation of carbon oxides

Methane anaerobic oxidation

Methane and Ammonia Oxidation

Methane and methanol oxidation to formaldehyde

Methane anodic oxidation

Methane combustion with oxides

Methane complete oxidation

Methane continued) oxidation

Methane continued) oxide

Methane controlled oxidation

Methane conversion processes oxidative coupling

Methane conversion processes partial oxidation

Methane electrochemical partial oxidation

Methane fuel oxidation within SOFC

Methane monooxygenase oxidized

Methane nitrogen oxide reduction with

Methane oxidation

Methane oxidation carbonylation

Methane oxidation cycle, troposphere

Methane oxidation high temperature

Methane oxidation methanol

Methane oxidation promotion

Methane oxidation rate constants

Methane oxidation reaction mechanism

Methane oxidation states

Methane oxidation steam reforming

Methane oxidation systems

Methane oxidation, microbial

Methane oxidation, photocatalytic

Methane oxidative addition

Methane oxidative carbonylation

Methane oxidative condensation

Methane oxidative coupling reaction with

Methane oxidative dimerization

Methane oxidative methylation with

Methane oxidative transformations

Methane oxidization

Methane partial oxidation to syngas

Methane partial oxidation to synthesis gas

Methane peroxynitrous acid oxidation

Methane thermal oxidation

Methane thiol, from oxidation

Methane, catalytic partial oxidation

Methane, direct oxidation

Methane, from radiolytic oxidation

Methane, oxidation over perovskites

Methane, oxidative behavior

Methane, partial oxidation

Methane, selective oxidation

Methane, tropospheric oxidation cycle

Methane-oxidizing bacteria

Methanol, production methane oxidation

Methanotrophs (methane-oxidizing

Methyl disulfide, oxidation to methane

Methyl disulfide, oxidation to methane sulfinyl chloride by chlorine

Model methane oxidative coupling

Nickel oxidation of methane

Nickel oxide reduction with methane

Nitrification and Methane Oxidation

Nitrous oxide methane oxidation

Oxidation methane coupling

Oxidation methane exploitation

Oxidation of Methane in the Natural Atmosphere and OH Radical Chain Reaction

Oxidation of Methane on Supported Palladium Under Lean Conditions Kinetics, Structure and Properties

Oxidation of methane

Oxidation of methane over monoliths

Oxidation of methane to methanol

Oxidation products methane conversion

Oxidation products methane—oxygen mixtures

Oxidation-reduction reactions methane fermentations

Oxidative Conversion of Methane to Syngas

Oxidative addition of methane

Oxidative coupling of methan

Oxidative coupling of methane

Oxidative coupling of methane over

Oxidative coupling of methane process

Oxidative coupling of methane to ethane

Oxidative coupling, methane over

Oxidative dimerization of methane

Oxidative methane activation

Oxygen-permeable membrane methane oxidative coupling

Ozone, atmosphere methane oxidation cycle

Palladium methane oxidation

Partial oxidation and dry reforming of methane

Partial oxidation of methane

Partial oxidation of methane to formaldehyde

Partial oxidation of methane to syngas

Partial oxidation, of methane to synthesis

Photochemical oxidation of methane

Production during methane oxidation

Reaction methane oxidation

Reduction methane oxidation

Rhodium oxidative methane carbonylation

Selective Oxidative Activation of Methane

Selective oxidation of methane

Solid oxide fuel cells methane steam reforming

Sulfate reduction and methane oxidation

Syngas methane partial oxidation reaction

The oxidation of methane

Total Oxidation of Methane

Transition-metal oxides methanation

XPS In Situ Reaction Methane Oxidation

© 2024 chempedia.info