Molybdenum species on alumina and silica supports for soot combustion
Molybdenum species on alumina and silica supports for soot combustion
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DOI：
10.1016/j.catcom.2004.10.002
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发表时间：
2005
影响因子：
3.7
通讯作者：
S. Braun;L. G. Appel;M. Schmal
中科院分区：
文献类型：
--
作者：
S. Braun;L. G. Appel;M. Schmal
对不同钼物种的Mo/Al_2O_3和Mo/SiO_2催化剂进行了柴油机碳烟燃烧试验。由于存在不同的物种，这些催化剂表现出不同的性能，其中分散在二氧化硅表面上的催化剂活性最高，与Mo 2 O 72-离子相似。通过差热分析评价了催化剂的热稳定性，结果表明，在反应条件下，在二氧化硅负载的催化剂上形成的Mo物种是热稳定的。Mo/SiO2催化剂的性能可能归因于这些物种与烟灰之间的接触，而不是由于这些物种与二氧化硅载体的弱相互作用而产生的MoO 3蒸气。
Mo/Al2O3and Mo/SiO2catalysts with different molybdenum species were tested in diesel soot combustion. These catalysts have shown different performances due to the presence of different species, being the most active those dispersed onto silica surface, which are similar to Mo2O72-ion. The thermal stability was evaluated by differential thermal analyses and the results have shown that Mo species formed on silica-supported catalysts are thermally stable under the reaction conditions. The performance of Mo/SiO2catalyst may be attributed to the contact between these species and the soot and not to the MoO3vapor originated by a weak interaction of these species with the silica support.