| 高晓庆,王永钊,赵永祥.Mn助剂对Ni/γ-Al2O3催化剂CO2甲烷化性能的影响[J].分子催化,2011,(1):49-54 |
| Mn助剂对Ni/γ-Al2O3催化剂CO2甲烷化性能的影响 |
| Effect of Manganese Promoter on the Catalytic Performance of Ni/γ-Al2O3 Catalysts for CO2 Methanation |
| 投稿时间：2010-12-22 修订日期：2011-01-28 |
| DOI： |
| 中文关键词: 二氧化碳 甲烷化 Ni/γ-Al2O3 Mn助剂 |
| 英文关键词:carbon dioxide methanation Ni/γ-Al2O3 manganese promoter |
| 基金项目: |
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| 摘要点击次数: 1773 |
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| 中文摘要: |
| 采用等体积浸渍法制备了Ni/γ-Al2O3和Ni-Mn/γ-Al2O3催化剂，在连续流动微反装置上考察了催化剂的CO2甲烷化催化活性。借助N2物理吸附、XRD、H2-TPR、TPD及TPSR手段对催化剂的结构和性质进行表征。结果表明，Ni/γ-Al2O3中Mn的添加促进了镍物种的分散，同时降低了催化剂的还原温度，还原后催化剂上中等强度CO2吸附位增多，活性比表面增加，使Ni-Mn/γ-Al2O3催化剂表现出高的CO2甲烷化催化活性。在V(CO2)/V(H2)=1/4、空速5000 h-1、常压的反应条件下，Ni-Mn/γ-Al2O3在270 ℃时可将CO2完全转化为甲烷，比Ni/γ-Al2O3上CO2完全转化温度降低了60 ℃。 |
| 英文摘要: |
| The Ni/γ-Al2O3 and Ni-Mn/γ-Al2O3 catalysts were prepared by incipient-wetness impregnation method. The catalytic activities of the catalysts were carried out in a fixed-bed continuous flow operating system. The catalysts were investigated via the N2 physisorption, XRD, H2-TPR, TPD and TPSR characterizations. The results indicated that addition of manganese promoter increased nickel species dispersion and decreased the reduce temperature. After reduction, the amounts of moderate intensity CO2 adsorption site and active surface area both increased on the Ni-Mn/γ-Al2O3 catalyst. As a result, the Ni-Mn/γ-Al2O3 catalyst showed higher catalytic activity for CO2 methanation. Under the reaction conditions: V(CO2)/V(H2) = 1/4, GHSV 5000 h-1 and atmosphere pressure, the Ni-Mn/γ-Al2O3 catalyst can make CO2 completely convert into methane at 270 ℃, which is 60 ℃ lower than Ni/γ-Al2O3 catalyst. |
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