Oxidative dehydrogenation of ethane over Ni–W–O mixed metal oxide catalysts

Promoted NiO Catalysts for the Oxidative Dehydrogenation of Ethane

“…For many years the typical catalysts for the ODHE reported in the literature consisted of vanadium oxide supported on different metal oxides [6,7] and recently unconventional materials such as nanocatalysts [8,9], catalysts derived from heteropolyacids [10] and carbon nanotubes [11] have demonstrated to be efficient in this reaction but their catalytic performance is still far from the best catalytic systems, which are NiO-based catalysts [12][13][14][15][16][17][18][19][20][21][22] and MoVNb-mixed metal oxide materials [23][24][25][26].…”

“…However, if nickel oxide is promoted with several elements [12][13][14][15][16][17][18][19][20][21] or supported on metal oxides [28] with appropriate characteristics the catalytic performance drastically changes as the formation of carbon dioxide decreases and the selective transformation to ethylene greatly increases. Therefore, ethylene can be efficiently obtained from ethane in the presence of oxygen using promoted nickel oxide catalysts.…”

Catalytic steam reforming of ethanol over W-, V-, or Nb–modified Ni-Al-O hydrotalcite-type precursors

“…For NiO there is one peak at 360 о С corresponding to NiO reduction by H 2 to Ni [16,18]. Tungsten incorporation into nickel oxide shifts reduction peaks to higher temperatures [17] apparently caused by interaction between small NiO particles and tungsten oxide nanoparticles (surface area significantly increases with W addition) [18]. NiO doping by Nb cations results in the opposite effect, shifting the reduction peak to lower temperatures [19].…”

Optimizing Both Catalyst Preparation and Catalytic Behaviour for the Oxidative Dehydrogenation of Ethane of Ni–Sn–O Catalysts

“…In the last ten years, metal-promoted nickel oxides have been intensively studied as catalysts for the oxidative dehydrogenation (ODH) of ethane [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] especially those related to Ni-Nb-O metal oxides [2-4, 6-10, 12]. In fact, nickel oxide presents a low selectivity to ethylene (from 10 to 30% at conversion lower than 30%), depending on catalyst preparation procedure [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

“…In fact, nickel oxide presents a low selectivity to ethylene (from 10 to 30% at conversion lower than 30%), depending on catalyst preparation procedure [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Moreover, promoted [1][2][3][4][5][6][7][8][9][10][11][12][13] or supported [14][15][16][17][18] nickel oxide changes the catalytic behavior in terms of activity and selectivity. A clear example is observed in the case of Ni-W-O in which the reaction network for ethane ODH strongly changes depending on Ni/W atomic ratio [5]: i) parallel and consecutive reactions takes place (with the formation of ethylene, CO and CO2, and with overoxidation of ethylene) are observed over Ni-poor catalysts (in which Ni-tungstate is mainly observed); and ii) parallel reaction (with the formation of ethylene and CO2, and without overoxidation of ethylene) are observed over Ni-rich catalysts (in which NiO is mainly observed).…”