Effective heat supply from combustion to reforming in methane reforming with CO2 and O2: comparison between Ni and Pt catalysts
Effective heat supply from combustion to reforming in methane reforming with CO2 and O2: comparison between Ni and Pt catalysts
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DOI：
10.1016/s0926-860x(02)00131-x
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发表时间：
2002-07
影响因子：
5.5
通讯作者：
K. Tomishige;S. Kanazawa;Koichi Suzuki;M. Asadullah;Motoki Sato;K. Ikushima;K. Kunimori
中科院分区：
文献类型：
--
作者：
K. Tomishige;S. Kanazawa;Koichi Suzuki;M. Asadullah;Motoki Sato;K. Ikushima;K. Kunimori
考察了Pt/Al 2 O3和Ni/Al 2 O3上甲烷与CO2和O2重整反应的固定床温度分布。Pt/Al_2O_3和Ni/Al_2O_3催化剂对甲烷与CO_2重整反应的催化活性相当。另一方面，甲烷在催化剂上的燃烧活性显著不同（Pt/Al_2O_3> Ni/Al_2O_3）。在甲烷与CO2和O2的重整反应中，Pt/Al 2 O3催化剂上的甲烷转化率明显高于Ni/Al 2 O3催化剂。从各种反应条件下的床温测量曲线可以看出，燃烧区和重整区之间的距离变得非常短。这与Pt金属本身的高还原性有关，Pt在燃烧区和氧气存在下保持金属状态。在这种情况下，可以非常有效地将燃烧热供给到重整反应。其结果可以与具有高能量效率的合成气生产相关联。
The temperature profile of the fixed catalyst bed in methane reforming with CO2and O2was investigated over Pt/Al2O3and Ni/Al2O3. The activities on Pt/Al2O3and Ni/Al2O3were in the same level in methane reforming with CO2. On the other hand, the activity of methane combustion over the catalysts was significantly different (Pt/Al2O3⪢Ni/Al2O3). In methane reforming with CO2and O2, methane conversion over Pt/Al2O3was considerably higher than over Ni/Al2O3. From the profiles of bed temperature measurements under various reaction conditions, one sees that the distance between combustion and reforming zones becomes very short. This is related to the high reducibility of Pt metal itself, and Pt maintains metallic state in the combustion zone and under the presence of oxygen. In this case, the combustion heat can be supplied to the reforming reaction very effectively. The result can be connected to the synthesis gas production with high energy efficiency.