Conversion of Methane to Methanol: Nickel, Palladium, and Platinum (d9) Cations as Catalysts for the Oxidation of Methane by Ozone at Room Temperature

2010 ◽  
Vol 16 (38) ◽  
pp. 11605-11610 ◽  
Author(s):  
Andrea Božović ◽  
Stefan Feil ◽  
Gregory K. Koyanagi ◽  
Albert A. Viggiano ◽  
Xinhao Zhang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Oxidation Of Methane ◽  
Conversion Of Methane

Dioxygen splitting at room temperature over distant binuclear transition metal centers in zeolites for direct oxidation of methane to methanol

2021 ◽  
Author(s):  
Kinga Mlekodaj ◽  
Mariia Lemishka ◽  
Stepan Sklenak ◽  
Jiri Dedecek ◽  
Edyta Tabor
Keyword(s):  
Transition Metal ◽  
Room Temperature ◽  
Direct Oxidation ◽  
Metal Centers ◽  
Oxidation Of Methane ◽  
First Time

Here we demonstrate for the first time the splitting of dioxygen at RT over distant binuclear transition metal (M = Ni, Mn, and Co) centers stabilized in ferrierite zeolite. Cleaved...

Pyrolysis of Methane to Higher Hydrocarbons: A Thermodynamic Study

1989 ◽  
Vol 42 (10) ◽  
pp. 1655 ◽  
Author(s):  
FP Larkins ◽  
AZ Khan
Keyword(s):  
Gas Phase ◽  
Pressure Range ◽  
Solid Carbon ◽  
Free Energies ◽  
Oxidation Of Methane ◽  
Conversion Of Methane ◽  
Equilibrium Conversion ◽  
Benzene Toluene ◽  
Higher Hydrocarbons ◽  
The Individual

Some basic thermodynamic parameters such as Gibbs free energies, enthalpies of reactions and equilibrium compositions of products from the pyrolysis and partial oxidation of methane to higher hydrocarbons in the gas phase have been determined within a consistent framework for the temperature range 800-1500 K and the pressure range 0.1-3 MPa , by using the CSIRO-SGTE THERMODATA system. It has been established that the pyrolysis of methane to higher hydrocarbons, e.g. acetylene, ethylene, ethane, prop-1-ene, propane, benzene, toluene, naphthalene, 1-methylnaphthalene and 2-methylnaphthalene, considered as separate reactions, is a highly endothermic reaction with the Gibbs free energies for the individual reactions being positive until 1300 K. The aromatics are thermodynamically most favoured with the equilibrium yields increasing with temperature. Addition of O2 lowers the heats of synthesis and the free energies for methane conversion but no enhancement in the equilibrium yields of hydrocarbons is observed. When solid carbon is allowed, it is the dominant product in all cases with the equilibrium yields for all hydrocarbons becoming negligible. Increasing the pressure at a particular temperature has more effect on the lowering of the equilibrium conversion of methane than on the suppression of solid carbon. Such data are valuable for understanding the conversion limits for methane into higher hydrocarbons.

scholarly journals Ultrahigh Electrocatalytic Conversion of Methane at Room Temperature

2017 ◽  
Vol 4 (12) ◽  
pp. 1700379 ◽  
Author(s):  
Ming Ma ◽  
Bing Jun Jin ◽  
Ping Li ◽  
Myung Sun Jung ◽  
Jin Il Kim ◽  
...  
Keyword(s):  
Room Temperature ◽  
Conversion Of Methane

scholarly journals Dioxygen dissociation over man-made system at room temperature to form the active α-oxygen for methane oxidation

2020 ◽  
Vol 6 (20) ◽  
pp. eaaz9776 ◽  
Author(s):  
Edyta Tabor ◽  
Jiri Dedecek ◽  
Kinga Mlekodaj ◽  
Zdenek Sobalik ◽  
Prokopis C. Andrikopoulos ◽  
...  
Keyword(s):  
Gas Phase ◽  
Room Temperature ◽  
Practical Importance ◽  
Oxidation Reactions ◽  
Reaction Conditions ◽  
Oxidation Of Methane ◽  
Oxidation Properties ◽  
Enzyme Functionality ◽  
Methane Utilization ◽  
Selective Oxidation Reactions

Activation of dioxygen attracts enormous attention due to its potential for utilization of methane and applications in other selective oxidation reactions. We report a cleavage of dioxygen at room temperature over distant binuclear Fe(II) species stabilized in an aluminosilicate matrix. A pair of formed distant α-oxygen species [i.e., (Fe(IV)═O)2+] exhibits unique oxidation properties reflected in an outstanding activity in the oxidation of methane to methanol at room temperature. Designing a man-made system that mimicks the enzyme functionality in the dioxygen activation using both a different mechanism and structure of the active site represents a breakthrough in catalysis. Our system has an enormous practical importance as a potential industrial catalyst for methane utilization because (i) the Fe(II)/Fe(IV) cycle is reversible, (ii) the active Fe centers are stable under the reaction conditions, and (iii) methanol can be released to gas phase without the necessity of water or water-organic medium extraction.

Room-temperature conversion of the photoelectrochemical oxidation of methane into electricity at nanostructured TiO2

2021 ◽  
Vol 5 (1) ◽  
pp. 127-134
Author(s):  
Yanir Kadosh ◽  
Eli Korin ◽  
Armand Bettelheim
Keyword(s):  
Fuel Cell ◽  
Room Temperature ◽  
Nanotube Arrays ◽  
Nanostructured Tio2 ◽  
Oxidation Of Methane ◽  
Photoelectrochemical Oxidation ◽  
First Time ◽  
Room Temperature Operation

The room-temperature operation of a methane-based photo-fuel cell is demonstrated for the first time. This is achieved using a TiO2 nanotube arrays photoanode which shows effective oxidation of methane.

Cu oxo nanoclusters for direct oxidation of methane to methanol: formation, structure and catalytic performance

2020 ◽  
Vol 10 (21) ◽  
pp. 7124-7141
Author(s):  
Lei Tao ◽  
Insu Lee ◽  
Maricruz Sanchez-Sanchez
Keyword(s):  
Catalytic Performance ◽  
Direct Oxidation ◽  
The Past ◽  
Selective Conversion ◽  
Oxidation Of Methane ◽  
Methanol Formation ◽  
Conversion Of Methane ◽  
Microporous Solids

Cu oxo nanoclusters hosted in microporous solids have emerged in the past decades as promising materials for catalyzing the selective conversion of methane to methanol.

Synergistic photocatalysis–Fenton reaction for selective conversion of methane to methanol at room temperature

2020 ◽  
Vol 10 (8) ◽  
pp. 2329-2332 ◽  
Author(s):  
Yi Zeng ◽  
Hang Chen Liu ◽  
Jing Sheng Wang ◽  
Xing Yang Wu ◽  
Song Ling Wang
Keyword(s):  
Fenton Reaction ◽  
Room Temperature ◽  
Solar Light ◽  
Selective Conversion ◽  
Conversion Of Methane

Combining the photocatalysis and Fenton reaction highly promote the yield and selectivity of CH3OH from CH4 with solar light at room temperature, up to 471 μmol g−1 h−1 and 83%, respectively.

scholarly journals Direct Convertion Of Methane To Liquid Hydrocarbons Using HZSM-5 Zeolite Catalyst Loaded With Metal

REAKTOR ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 7
Author(s):  
D. D. Anggoro
Keyword(s):  
Natural Gas ◽  
Packed Bed ◽  
Direct Conversion ◽  
Single Step ◽  
Packed Bed Reactor ◽  
Impregnation Method ◽  
Liquid Hydrocarbons ◽  
Oxidation Of Methane ◽  
Conversion Of Methane ◽  
Main Component

Methane is the main component of natural gas and this research provides the platrorm on the potential of utilizing natural gas, found abundant in Indonesia, to form gasoline. The objectives of the research are to modify HZSM-5 zeolite with a series of transition metals (Cr, Mn, Co, Ni, Cu, and Pt) and Ga , and to evaluate the performances  of these catalyst  for the single step conversion of methane to gasoline. The oxidation of methane were carried out in a micro-packed bed reactor at atmoepheric pressure, temperature 800 0C, F/W = 10440 ml/g.hr and 9%vol O2. Metals were loaded into the HZSM-5 zeolite by the wetness incipient impregnation method. The characterization results indicated that the ionic metals (Mn+) occupy the H+ position of HZSM-5 and metal loaded HZSM-5. Ni- HZSM-5, Cu- HZSM-5 and Ga- HZSM-5 gave a high methane conversion and high gasoline selectivity. Among the catalyst samles tested, Cr- HZSM-5 showed the highest  Research Octane Number (RON=86). These  catalyst have the potential  to convert natural gas to C5+ liquid hydrocarbons provided the oxidation, dehydration and oligomerization function of the metals are in balance.Keywords : direct conversion, methane, liquid hydrocarbons, metal, HZSM-5

Study on the Photo-Electro-Catalytic Oxidation of Methane

2013 ◽  
Vol 864-867 ◽  
pp. 1421-1426
Author(s):  
Wen Yan Wu ◽  
Luo Chun Wang ◽  
Zhen Zhou ◽  
Ke Jia Liu ◽  
Xiao Hua Li ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Photocatalytic Oxidation ◽  
Uv Light ◽  
Ambient Pressure ◽  
Kinetic Constant ◽  
Illumination Time ◽  
Oxidation Of Methane ◽  
Conversion Of Methane ◽  
Intermittent Illumination ◽  
Electro Catalytic Oxidation

Emission control of methane from landfills has received considerable attentions in recent years. Photo-electro-catalytic oxidation of methane was carried out at the mode of continuous electrolysis and intermittent illumination with TiO2-coated titanium mesh plate as pholocatalyst and electrode in combination with ionic liquid as electrolyte under UV light irradiation. The result showed that the rapid conversion of methane was achieved under ambient pressure and temperature through photocatalytic oxidation combining with electrolysis. Under the mode of intermittent illumination (on:off = 10 min : 10 min) and continuous electrolysis (II-CE), the highest oxidation rate of methane (280 mg/(m3min)) was obtained. Under fixed off time and total illumination time, the oxidation quantity of methane linearly increased with the intermittent frequency. Photo-electro-catalytic oxidation of methane can be described by the first-order kinetics, and the apparent kinetic constant increased with the intermittent frequency.

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