Hydrogen Production from Steam Reforming of Hydrocarbons over Alkaline-Earth Metal-Modified Fe- or Ni-Based Catalysts
Hydrogen Production from Steam Reforming of Hydrocarbons over Alkaline-Earth Metal-Modified Fe- or Ni-Based Catalysts
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DOI：
10.1021/ef0301295
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发表时间：
2004
期刊：
影响因子：
5.3
通讯作者：
K. Murata;Linsheng Wang;M. Saito;M. Inaba;and Isao Takahara;N. Mimura
中科院分区：
文献类型：
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作者：
K. Murata;Linsheng Wang;M. Saito;M. Inaba;and Isao Takahara;N. Mimura
考察了异辛烷和甲基环己烷在铁基和镍基催化剂上的水蒸气重整反应。在O2/CO2存在下，FeEMG/Al_2O_3催化剂对甲烷的分解反应是有效的，对异辛烷的水蒸气重整反应具有活性，比Mch更容易引起C-−-C键断裂，但由于甲烷和C2的生成增加，虽然Rh改性仅略微提高了产氢速率，但产氢速率仍然不足。对于MCH的水蒸气重整反应，FeEMG/Al_2O_3催化剂的活性也低于Ni系。Rh对FeMG/Al_2O_3催化剂进行改性后，芳香族副产物的生成量增加。结果表明，Ni/ZrO2催化剂的产氢速率是FeMG/Al_2O_3催化剂的7倍。此外，在催化剂中加入碱土金属(M/Ni=1：2wt比)可以提高催化剂的稳定性。其中，添加锶的效果最好，NiSr/ZrO2催化剂的催化活性较高。
The steam reforming of isooctane and methylcyclohexane (MCH) was investigated over Fe- and Ni-based catalysts. FeMg/Al2O3 catalyst, effective for CH4 decomposition in the presence of O2/CO2, was active for steam reforming of isooctane, being a little easier to cause C−C bond cleavage than MCH, but the rate of hydrogen production was insufficient, although the rate was only slightly improved by Rh modification, due to raised formation of CH4 and C2. FeMg/Al2O3 catalyst was also less active for the steam reforming of MCH than Ni systems. Modification of FeMg/Al2O3 catalyst with rhodium resulted in the increased formation of aromatic byproducts. The rate of H2 production with Ni/ZrO2 catalyst was found to be 7 times higher than that with FeMg/Al2O3. Furthermore, the stability of the Ni/ZrO2 catalyst was found to be improved by the addition of alkaline-earth metals into the catalyst (M/Ni = 1:2 wt ratio). In particular, the addition of Sr was the most effective and the activity of NiSr/ZrO2 catalyst for the r...