Phase states of Li/W/Mn/SiO2 composites in catalytic oxidative coupling of methane

Optimizing the Reaction Performance of La2Ce2O7‐Based Catalysts for Oxidative Coupling of Methane (OCM) at Lower Temperature by Lattice Doping with Ca Cations

“…[2][3][4] Mn/Na 2 WO 4 /SiO 2 and its promoted forms have both good catalytic performance and long-term stability. [5][6][7][8][9][10][11][12][13][14] However, the property of the active sites in this complicated catalyst has not yet been understood very clearly. Additionally, on this catalyst, OCM reaction can only take place efficiently above 800°C.…”

“…Although Li/MgO exhibits good initial catalytic performance, its stability is suffered from the vaporization of Li + cations, the structure modifier, at elevated temperatures . Mn/Na 2 WO 4 /SiO 2 and its promoted forms have both good catalytic performance and long‐term stability . However, the property of the active sites in this complicated catalyst has not yet been understood very clearly.…”

Effect of surface treatment technique on properties and performance of Na2WO4‐TiO2‐MnOx/SiO2 for oxidative coupling of methane

“…For NWTM‐CP, the distributions of W, Ti, and Mn were relatively high. Generally, the cold plasma technique can produce active radicals, ions, excited atoms, and active phases of the catalyst by electron impact ionization and a magnetic field with high‐energy electrons (10 000–100 000 K) and with an actual gas temperature close to the ambient temperature on the surface of the sample 60 . Moreover, the cold plasma is well dispersed on the insulating barrier.…”

Reinvestigations of the Li2O–WO3 system

“…The following materials were used for the research: WO 3 [16] in suitable proportions enabling preparation of 5 g of final product were homogenized in an agate mortar and calcinated at 450, 500, 550, 600, 650 and 700°C in 24-h stages in an air atmosphere. After each heating stage, the samples were cooled down to room temperature with furnace, powdered in mortar and examined with the help of XRD.…”

“…Phases forming in this system owing to their interesting properties are potential candidates for the production of components of electrodes for lithium batteries, catalysts of oxidative coupling of light hydrocarbons, fluxes for single crystal growing, electrochromic and photochromic devices as well as neutron detectors [1][2][3][4]. Previous studies on the Li 2 O-WO 3 system have revealed the formation of seven binary compounds: Li 6 [5,6] and one of the WO 3 -Li 2 O system [7].…”