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首页> 外文期刊>ACS catalysis >Direct Nonoxidative Conversion of Methane to Higher Hydrocarbons over Silica-Supported Nickel Phosphide Catalyst
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Direct Nonoxidative Conversion of Methane to Higher Hydrocarbons over Silica-Supported Nickel Phosphide Catalyst

机译：在二氧化硅载镍磷化镍催化剂上直接非氧化转化甲烷至高级烃

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摘要

The direct dehydrogenative conversion of methane (DCM) to higher hydrocarbons has attracted much attention, because of the efficient utilization of natural gas. Ni catalysis of activation of C-H bonds of methane to H-2 and C is well-known. We have tried to control the catalysis of Ni via the addition of second elements and found silica-supported nickel phosphide (Ni-P/SiO2) materials as active catalysts for the DCM reaction at 1173 K. The products included C2H4 (ethylene), C2H6 (ethane), C2H2 (acetylene), C3H6 (propylene), C6H6 (benzene), C7H8 (toluene), and C10H8 (naphthalene). The formation of Ni2P on silica was determined using scanning electron microscopy and X-ray diffraction. Pure Ni2P material without support showed a fine catalytic activity for the DCM reaction. Almost the same activation energies of the Ni2P (249 kJ mol(-1)) and Ni-P/SiO2 catalysts (251 kJ mol(-1)) were obtained in the conversion rate of methane, which were lower than that of SiO2 (365 kJ mol(-1)). This indicated that Ni2P was the activate phase for the DCM reaction. The Ni2P phase activates C-H bonds of methane and converts to ethane. Other higher hydrocarbons were produced from ethane in the gas phase at 1173 K.
机译：由于天然气的有效利用，甲烷（DCM）对较高的烃的直接脱氢转化率引起了很多关注。 Ni催化甲烷对H-2和C的C-H键的激活是众所周知的。我们已经尝试通过添加第二元素并发现二氧化硅载体的镍（Ni-P / SiO 2）材料作为在1173K下的DCM反应的活性催化剂来控制Ni的催化剂。该产物包括C 2 H 4（乙烯），C2H6 （乙烷），C 2 H 2（乙炔），C3H6（丙烯），C6H6（苯），C7H8（甲苯）和C10H8（萘）。使用扫描电子显微镜和X射线衍射测定二氧化硅上的Ni2P的形成。不支持的纯Ni2P材料显示出DCM反应的精细催化活性。在甲烷的转化率下，获得几乎与Ni2P（249kJMol（-1））和Ni-P / SiO 2催化剂（251kJmol（-1））的相同激活能量低于SiO2（ 365 kj mol（-1））。这表明Ni2P是DCM反应的活性相。 Ni2P相激活甲烷的C-H键并转化为乙烷。其他较高的烃在1173k的气相中由乙烷制成。

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