Partial oxidation of methane to methanol in a flow reactor at elevated pressure

1991 ◽  
Vol 30 (10) ◽  
pp. 2287-2292 ◽  
Author(s):  
Daniel W. Rytz ◽  
Alfons Baiker
Keyword(s):  
Partial Oxidation ◽  
Flow Reactor ◽  
Elevated Pressure ◽  
Partial Oxidation Of Methane ◽  
Oxidation Of Methane

scholarly journals Preparation and Activity of Precipitated Ni-MgO/Al2O3 Catalysts for the Partial Oxidation of Methane

2007 ◽  
Vol 7 (1 & 2) ◽  
pp. 108
Author(s):  
Luis F. Razon ◽  
Carlito M. Salazar ◽  
Hiroo Niiyama ◽  
Long The Nam Doan
Keyword(s):  
Partial Oxidation ◽  
Reaction Temperature ◽  
Flow Reactor ◽  
Fixed Bed ◽  
Catalyst Preparation ◽  
Partial Oxidation Of Methane ◽  
Precipitation Method ◽  
Molar Ratio ◽  
Preparation Methods ◽  
Oxidation Of Methane

The effect of catalyst preparation methods, NiO/MgO molar ratio and reaction temperature on the performance of Ni-MgO catalysts supported on Al2O3 in the partial oxidation of methane to syngas were investigated in a fixed-bed flow reactor. Three catalyst preparation methods (all slight variants of the precipitation method) produced comparable results in CH4 conversion, CO and H2 selectivities. Energy Dispersive X-Ray (EDX) analysis and the color of the catalysts after reaction showed that catalysts produced by simultaneous dissolution of the nickel and magnesium salts may have better carbon deposition resistance. NiO/MgO molar ratio significantly affected the performance of the catalyst. When the NiO/MgO ratio decreased, activity decreased. At a NiO/MgO molar ratio of 1/2 and a reduction temperature of 850°C, CH4 conversion and CO selectivity increased when reaction temperature increased while H2 selectivity remained almost the same. The catalyst gave excellent activity and remained stable after 5h time-on-stream.

The Promotive Properties of Alkali Metal Nitrate Melts for the Partial Oxidation of Methane to Methanol

1998 ◽  
Vol 53 (2) ◽  
pp. 249-255
Author(s):  
Bor-Jih Lee ◽  
Shigeo Kitsukawa ◽  
Shukuji Asakura ◽  
Kenzo Fukuda
Keyword(s):  
Partial Oxidation ◽  
Methane Conversion ◽  
Flow Reactor ◽  
Metal Nitrate ◽  
Partial Oxidation Of Methane ◽  
Oxygen Species ◽  
Reaction Products ◽  
Oxidation Of Methane ◽  
Methanol Formation ◽  
Major Reaction

Abstract (Na, K)NO3 melts of various ratios were used as promoters for the partial oxidation of methane to methanol. Experiments were performed in a flow reactor system under atmo­spheric pressure and at various temperatures in the range of 525-600 °C. The influence of reaction temperature, melt composition, and reduced oxygen species on methane conversion and methanol selectivity were investigated systematically. The major reaction products were CH3OH, CO, CO2, and trace amounts of C2H6 and C2H4. A methane conversion of 1.8-12.4% and a methanol selectivity of 0.4-14.1% were obtained under these reaction condi­tions. Binary melts could achieve higher methanol selectivity than a single melt. The amounts of reduced oxygen species O2- and O22-were estimated from thermochemical data according to the ion equilibrium in molten nitrates. The promotive effect of nitrate melts was confirmed and the results indicate that superoxide O2- plays an important role for methanol formation.

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