Preparation and characterization of active Ni/MgO in oxidative steam reforming of n-C4H10
Preparation and characterization of active Ni/MgO in oxidative steam reforming of n-C4H10
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DOI：
10.1016/j.ijhydene.2010.03.028
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发表时间：
2010-06
影响因子：
7.2
通讯作者：
Katsutoshi Sato;Fumiaki Sago;Katsutoshi Nagaoka;Y. Takita
中科院分区：
文献类型：
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作者：
Katsutoshi Sato;Fumiaki Sago;Katsutoshi Nagaoka;Y. Takita
研究了MgO负载Ni催化剂上正丁烷氧化水蒸气重整反应。以Ni（NO3）2为前驱体，采用浸渍法制备了Ni/MgO催化剂。在pH 7下制备的Ni/MgO表现出比由常规酸性水性前体溶液（pH 3.5）制备的Ni/MgO高得多的活性。在1660 L（h g）-1的高空速下，改性Ni/MgO的H2生成速率高达传统Ni/MgO的2.3倍。此外，在高温（1273 K）还原后，改性Ni/MgO比Rh/MgO具有更高的H2生成速率。改性后的Ni/MgO的上级性能是由于形成了较大的Ni 0颗粒，从而提高了Ni 0的抗氧化性。
Oxidative steam reforming of n-C4H10over MgO-supported Ni catalysts is described. The Ni/MgO catalysts were prepared by the impregnation method from aqueous Ni(NO3)2precursor solutions at two pH values. Ni/MgO prepared at pH 7 exhibited considerably higher activity than Ni/MgO prepared from a conventional acidic aqueous precursor solution (pH 3.5). The H2formation rate for the modified Ni/MgO was up to 2.3 times that for conventional Ni/MgO under a high space velocity of 1660 L(h g)−1. Furthermore, after reduction at high temperature (1273 K), the modified Ni/MgO showed a higher H2formation rate than did Rh/MgO. The superior performance of the modified Ni/MgO was ascribed to stronger resistance to oxidation of Ni0due to the formation of relatively large Ni0particles.