Oxidative coupling of methane over (Na2WO4+Mn or Ce)/SiO2 catalysts: In situ measurement of electrical conductivity
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Cited by (34)
Oxidative coupling of methane (OCM): An overview of the challenges and opportunities for developing new technologies
2021, Journal of Natural Gas Science and EngineeringEffect of facile nitrogen doping on catalytic performance of NaW/Mn/SiO<inf>2</inf> for oxidative coupling of methane
2021, Applied Catalysis B: EnvironmentalCitation Excerpt :In contrast, larger and sharper peaks assigned to the α-cristobalite phase (and also a small shoulder peak assigned to the tridymite phase) appear for all catalysts containing Na. This indicates that Na is responsible for the transformation of amorphous silica to α-cristobalite and tridymite phases during calcination at 800 °C, which is in agreement with many previous studies [21,43,44]. Interestingly, small peaks assigned to Mn2O3 appear only for the NaW/Mn/SiO2 and N5.05-NaW/Mn/SiO2 catalysts.
Recent advances and future prospect in catalysts for oxidative coupling of methane to ethylene: A review
2018, Journal of Industrial and Engineering ChemistryOxidative coupling of methane in solid oxide fuel cell tubular membrane reactor with high ethylene yield
2017, Catalysis CommunicationsCitation Excerpt :A final calcination at 800 °C for 5 h was applied to convert the mixture to the desired composition [26]. Supported Mn-Ce-Na2WO4 catalysts were synthesized following the wet impregnation method [27–29]. The desired support was first impregnated with aqueous solutions of Mn(NO3)2, Ce(NO3)3 and Na2WO4 at 80 °C and evaporated, followed by calcination at 850 °C for 6 h. Various supports investigated were La0.75Sr0.25Cr0.5Mn0.5O2.88 (LSCrM) [30], Gd0.2Ce0.8O1.9 (GDC, Fuelcellmaterials.com, SKU: 112102), (Y2O3)0.08(ZrO2)0.92 (YSZ, Fuellcellmaterials.com, SKU: 312005), SiO2 particles (0.5–10 μm, Sigma-Aldrich, S5631) and SiO2 gel (pore size 15 nm, Sigma-Aldrich, 236845), with the corresponding yielded catalysts labelled as Mn-Ce-Na2WO4/LSCrM, Mn-Ce-Na2WO4/GDC, Mn-Ce-Na2WO4/YSZ, Mn-Ce-Na2WO4/SiO2 NPs and Mn-Ce-Na2WO4/SiO2 gel, respectively.
Characterization of Mn-Na<inf>2</inf>WO<inf>4</inf>/SiO<inf>2</inf> and Mn-Na<inf>2</inf>WO<inf>4</inf>/MgO catalysts for the oxidative coupling of methane
2015, Applied Catalysis A: GeneralCitation Excerpt :In contrast, addition of Na2WO4 brings about a drastic change in the support, as expected from the significant decrease in surface area associated with the α-cristobalite SiO2 formation. The morphology is very similar to the one Malekzadeh and coworkers observed using SEM [10]. There is significant particle growth and agglomeration, and distinct SiO2 particles are no longer observed once Na2WO4 is added to the SiO2 support.
Available online January 11, 2010