Zirconia promoted metallic nickel catalysts for the partial oxidation of methane to synthesis gas

2009 ◽  
Vol 10 (6) ◽  
pp. 940-944 ◽  
Author(s):  
Yaquan Wang ◽  
Wenju Wang ◽  
Xuebin Hong ◽  
Bingbing Li
Keyword(s):  
Partial Oxidation ◽  
Synthesis Gas ◽  
Nickel Catalysts ◽  
Partial Oxidation Of Methane ◽  
Metallic Nickel ◽  
Oxidation Of Methane

scholarly journals Nickel Oxide Catalysts for Partial Oxidation of Methane to Synthesis Gas

2016 ◽  
Vol 18 (1) ◽  
pp. 25
Author(s):  
K. Dossumov ◽  
H. Kurokawa ◽  
Y.G. Yergaziyeva ◽  
L.K. Myltykbayeva ◽  
S.Zh. Tayrabekova
Keyword(s):  
Heat Treatment ◽  
Partial Oxidation ◽  
Synthesis Gas ◽  
Nickel Catalysts ◽  
Xrd Analysis ◽  
Treatment Temperature ◽  
Partial Oxidation Of Methane ◽  
Oxidation Of Methane ◽  
Supported Nickel Catalysts ◽  
High Calcination Temperature

<p class="Default">Nickel catalysts supported on different carriers (θ-Al<sub>2</sub>O<sub>3</sub>, γ-Al<sub>2</sub>O<sub>3</sub>, HZSM-5 with γ-Al<sub>2</sub>O<sub>3</sub>, HZSM-5, and NaX) have been investigated for the partial oxidation of methane. All the supported nickel catalysts showed a high activity for the formation of synthesis gas, and γ-Al<sub>2</sub>O<sub>3</sub> was the most effective among all the tested carriers. The effect of the heat-treatment temperature of the 3 wt.% Ni/γ-Al<sub>2</sub>O<sub>3</sub> catalyst on its catalytic activity was studied, and a considerable decrease in its activity was observed by the heat-treatment of the catalyst at 1000 °C compared with the catalysts prepared by the 300–800 °C – calcination. The XRD analysis suggested the formation of NiAl<sub>2</sub>O<sub>4</sub> that is a non-reducible compound at the high calcination temperature. The addition of a modifier (Co, Ce, or La) to the 3 wt.% Ni/γ-Al<sub>2</sub>O<sub>3</sub> catalyst increased the selectivity to H<sub>2</sub> and CO with the decreasing selectivity to CO<sub>2</sub>, and the highest selectivity to H<sub>2</sub> was obtained by the 5 wt.% NiLa/γ-Al<sub>2</sub>O<sub>3</sub>. The developed 5 wt.% NiLa/γ-Al<sub>2</sub>O<sub>3</sub> catalyst showed a high stability for 30 h for the partial oxidation of methane at 750 °C. The methane conversion reached 95%, selectivity to hydrogen 83% and 52% to carbon monoxide.</p>

La-hexaaluminate for synthesis gas generation by Chemical Looping Partial Oxidation of Methane Using CO2 as Sole Oxidant

AIChE Journal ◽  
2017 ◽  
Vol 64 (2) ◽  
pp. 550-563 ◽  
Author(s):  
Yanyan Zhu ◽  
Weiwei Liu ◽  
Xueyan Sun ◽  
Xiaoxun Ma ◽  
Yu Kang ◽  
...  
Keyword(s):  
Partial Oxidation ◽  
Synthesis Gas ◽  
Partial Oxidation Of Methane ◽  
Chemical Looping ◽  
Gas Generation ◽  
Oxidation Of Methane

scholarly journals New metal-oxide composite materials as efficient catalysts of the partial oxidation of methane

2019 ◽  
Vol 484 (3) ◽  
pp. 299-302
Author(s):  
A. G. Dedov ◽  
O. A. Slyakhtin ◽  
A. S. Loktev ◽  
G. N. Mazo ◽  
S. A. Malyshev ◽  
...  
Keyword(s):  
Partial Oxidation ◽  
Single Phase ◽  
Complex Oxides ◽  
Partial Oxidation Of Methane ◽  
Metallic Nickel ◽  
Oxidation Of Methane ◽  
Nickel Cobalt ◽  
Phase Complex ◽  
First Time ◽  
Properties Of Composites

Single-phase complex oxides Nd2-yCayCoxNi1-xO4 have been synthesized for the first time. Composites prepared by the reduction of these compounds with hydrogen and containing Nd2O3, CaO, and cobalt and nickels metals have been used for the first time as catalysts of the partial oxidation of methane. The maximal methane conversions (97%) and syngas yields (96%) at 900 °С have been detected in the presence of the composite obtained from Nd1,5Ca0,5NiO4. At T < 850 °C, the nickel–cobalt composite synthesized from Nd1,3Ca0,7Co0,4Ni0,6O4 turned out to be more selective in the formation of syngas. Decreasing the partial oxidation temperature from 900 °С to 750 °С leads to the oxidation of metallic nickel and cobalt to oxides and to partial resynthesis of complex oxides with perovskite and K2NiF4 structures. The observed differences in temperature dependence of the catalytic properties of composites with various Ni/Co ratios can be associated with the participation of complex oxides in catalysis of the partial oxidation of methane at low temperatures.

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