Carbon-supported molybdenum carbide catalysts for the conversion of vegetable oils.
Carbon-supported molybdenum carbide catalysts for the conversion of vegetable oils.
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DOI：
10.1002/cssc.201100476
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发表时间：
2012-04
期刊：
影响因子：
8.4
通讯作者：
Junxing Han;Jinzhao Duan;Pin Chen;H. Lou;Xiaoming Zheng;H. Hong
中科院分区：
文献类型：
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作者：
Junxing Han;Jinzhao Duan;Pin Chen;H. Lou;Xiaoming Zheng;H. Hong
采用溶剂蒸发诱导的自组装策略和碳热氢还原反应，成功地一锅制备了有序介孔碳（OMC）负载的碳化钼催化剂。氮气吸附、小角 XRD 和 TEM 表征表明，所得材料具有高比表面积、大孔体积、有序介孔结构、窄孔径分布和碳化钼颗粒分散均匀的特点。在碳热还原反应中用氢气代替氮气，碳化钼的形成温度可降低100℃以上。通过将钼前驱体的添加量从小于2%改变到大于5%，可以轻松地将碳化钼结构从Mo(2)C调节为MoC。通过植物油加氢脱氧评价OMC负载碳化钼催化剂的催化性能。与Mo(2)C相比，MoC在植物油转化为柴油类烃过程中表现出较高的产物选择性和优异的抗浸出性。
Ordered mesoporous carbon (OMC)-supported molybdenum carbide catalysts were successfully prepared in one pot using a solvent-evaporation-induced self-assembly strategy accompanied by a carbothermal hydrogen reduction reaction. Characterization with nitrogen sorption, small-angle XRD, and TEM confirmed that the obtained materials had high surface areas, large pore volumes, ordered mesoporous structures, narrow pore size distributions, and uniform dispersions of molybdenum carbide particles. With nitrogen replaced by hydrogen in the carbothermal reduction reaction, the formation temperature of molybdenum carbide could be reduced by more than 100 °C. By changing the amount of molybdenum precursor added from less than 2 % to more than 5 %, molybdenum carbide structures could be easily regulated from Mo(2) C to MoC. The catalytic performance of OMC-supported molybdenum carbide catalysts was evaluated by hydrodeoxygenation of vegetable oils. Compared with Mo(2)C, MoC exhibited high product selectivity and excellent resistance to leaching in the conversion of vegetable oils into diesel-like hydrocarbons.