High Selective Conversion of Methane to Carbon Monoxide and the Effects of Chlorine Additives in the Gas and Solid Phases on the Oxidation of Methane on Strontium Hydroxyapatites

1997 ◽  
Vol 36 (2) ◽  
pp. 328-334 ◽  
Author(s):  
Shigeru Sugiyama ◽  
Toshimitsu Minami ◽  
Tomonori Higaki ◽  
Hiromu Hayashi ◽  
John B. Moffat
Keyword(s):  
Carbon Monoxide ◽  
Selective Conversion ◽  
Oxidation Of Methane ◽  
Conversion Of Methane ◽  
Solid Phases

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.

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 CH4-to-CH3OH on Mononuclear Cu(II) Sites Supported on Al2O3: Structure of Active Sites from Electron Paramagnetic Resonance

2021 ◽  
Author(s):  
Jordan Meyet ◽  
Anton Ashuiev ◽  
Gina Noh ◽  
Mark Newton ◽  
Daniel Klose ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Organometallic Chemistry ◽  
Active Sites ◽  
Spectroscopic Characterization ◽  
Paramagnetic Resonance ◽  
Transition Alumina ◽  
Selective Conversion ◽  
Conversion Of Methane ◽  
Electron Paramagnetic ◽  
Alumina Supports

The selective conversion of methane to methanol remains one of the holy grails of chemistry, where Cu-exchanged zeolites have been shown to selectively convert methane to methanol under stepwise conditions. Over the years, several active sites have been proposed, ranging from mono-, di- to trimeric Cu(II). Herein, we report the formation of well-dispersed monomeric Cu(II) species supported on alumina using surface organometallic chemistry and their reactivity towards the selective and stepwise conversion of methane to methanol. Extensive studies using various transition alumina supports combined with spectroscopic characterization, in particular electron paramagnetic resonance (EPR), show that the active sites are associated with specific facets, which are typically found in gamma- and eta-alumina phase, and that their EPR signature can be attributed to species having a tri-coordinated [(Al<sub>2</sub>O)Cu<sup>II</sup>O(OH)]<sup>-</sup>,T-shape geometry. Overall, the selective conversion of methane to methanol, a two-electron process, involve two of these isolated monomeric Cu(II) sites that play in concert.

Coupling conversion of methane with carbon monoxide via carbonylation over Zn/HZSM-5 catalysts

2021 ◽  
Author(s):  
Fuli Wen ◽  
Jin Zhang ◽  
Zhiyang Chen ◽  
Ziqiao Zhou ◽  
Hongchao Liu ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Conversion Of Methane

Coupling conversion of methane with carbon monoxide over Zn/HZSM-5 catalysts.

Effect of Hydrogen and Carbon Monoxide Additions on Partial Oxidation of Methane at Elevated Pressures

2019 ◽  
Vol 92 (12) ◽  
pp. 1726-1733
Author(s):  
I. G. Fokin ◽  
A. V. Ozerskii ◽  
A. V. Nikitin ◽  
V. I. Savchenko ◽  
V. S. Arutyunov ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Partial Oxidation ◽  
Partial Oxidation Of Methane ◽  
Oxidation Of Methane ◽  
Elevated Pressures

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

Selective oxidation of methane to carbon monoxide on supported palladium catalyst

1992 ◽  
Vol 80 (1) ◽  
pp. L1-L5 ◽  
Author(s):  
A.K. Bhattacharya ◽  
J.A. Breach ◽  
S. Chand ◽  
D.K. Ghorai ◽  
A. Hartridge ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Selective Oxidation ◽  
Palladium Catalyst ◽  
Supported Palladium Catalyst ◽  
Oxidation Of Methane ◽  
Supported Palladium

Oxidation of methane, butane and carbon monoxide on Al−Fe oxide catalysts

1993 ◽  
Vol 49 (2) ◽  
pp. 235-240 ◽  
Author(s):  
S. Yu. Taskina ◽  
O. A. Kirichenko ◽  
G. K. Chermashentseva
Keyword(s):  
Carbon Monoxide ◽  
Oxide Catalysts ◽  
Fe Oxide ◽  
Oxidation Of Methane

ChemInform Abstract: Partial Oxidation of Methane to Carbon Monoxide and Hydrogen Over a Ni/ Al2O3 Catalyst.

ChemInform ◽  
2010 ◽  
Vol 23 (4) ◽  
pp. no-no
Author(s):  
D. DISSANAYAKE ◽  
M. P. ROSYNEK ◽  
K. C. C. KHARAS ◽  
J. H. LUNSFORD
Keyword(s):  
Carbon Monoxide ◽  
Partial Oxidation ◽  
Partial Oxidation Of Methane ◽  
Oxidation Of Methane ◽  
Al2o3 Catalyst
Sign in / Sign up

Export Citation Format

Share Document