Porous nickel based catalysts for partial oxidation of methane to synthesis gas
Porous nickel based catalysts for partial oxidation of methane to synthesis gas
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DOI：
10.1016/j.apcata.2011.05.018
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发表时间：
2011-07
影响因子：
5.5
通讯作者：
V. Kirillov;Z. A. Fedorova;M. M. Danilova-M.;V. Zaikovskii;N. A. Kuzin;V. A. Kuz’min;T. Krieger;V. Mescheryakov
中科院分区：
文献类型：
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作者：
V. Kirillov;Z. A. Fedorova;M. M. Danilova-M.;V. Zaikovskii;N. A. Kuzin;V. A. Kuz’min;T. Krieger;V. Mescheryakov
用X射线衍射、低温氮吸附、电子显微镜和能谱分析等方法研究了以氧化镁为底层的多孔镍为载体的镍催化剂的相组成和织构。通过用Mg（NO3）2溶液浸渍多孔镍，然后在550°C下煅烧，获得MgO底层;通过用Ni（NO3）2溶液浸渍，然后在450°C下煅烧，另外负载镍。在负载型还原镍催化剂（800-900°C，H2）中，观察到Ni相和NiO在MgO中的固溶体，相当一部分镍微晶与MgO外延结合。研究了多孔镍基催化剂上甲烷部分氧化制合成气（800° C，O2/C=0.65，GHSV=127 L/gh）的反应。在甲烷部分氧化反应中，初始镍载体的活性明显下降，甲烷转化率在负载镍催化剂上测试100 h后略有下降。
The phase composition and texture of nickel catalysts supported on ribbon porous nickel with a magnesium oxide underlayer were investigated by X-ray diffraction, low-temperature nitrogen adsorption, and electron microscopy combined with energy dispersive X-ray microanalysis. The MgO underlayer was obtained by impregnation the porous nickel with a Mg(NO3)2solution followed by calcination at 550°C; nickel was supported additionally by impregnation with a Ni(NO3)2solution followed by calcination at 450°C. In the supported reduced nickel catalysts (800–900°C, H2) the phases of Ni and a solid solution of NiO in MgO were observed; a considerable part of nickel crystallites was epitaxially bound with MgO. The partial oxidation of methane to synthesis gas (800°С, O2/C=0.65, GHSV=127 L/gh) over porous nickel based catalysts was studied. The activity of initial nickel support decreased considerably during the partial oxidation of methane; the value of methane conversion decreased slightly after 100h of testing on the supported nickel catalysts.