MCM-41分子筛负载钼钴系催化剂的程序升温硫化研究

采用程序升温硫化（TPS）技术，研究了负载于MCM－41分子筛的钼钴系催化剂的性能，根据TPOS结果可知，（1）载体和MoO3相互作用的强度顺序如下：Al2O3＞Al2O3-MCM-41＞MCM－41＞TiO2－MCM－41，说明TiO2具有削弱MCM－41和MoO3作用的能力；而Al2O3则相反，它增加了MoO3和MCM－41的相互作用。（2）助剂CoO对负载于未经改性的MCM－41载体上的MoO3的硫化没有明显的促进作用，这和以Al2O3为载体的情况下不同，在Al2O3上，MoO3和CoO可能生成Co-Mo－O复合相，从而促进了MoO3的硫化。（3）助剂CoO对负载于经TiO2和Al2O3改性的MCM－41上的MoO3的硫化起了促进作用。

TPS Study of MCM-41 Supported Mo-Co Catalysts

The characters of MoO 3 and MoO 3|CoO supported on meso|porous molecular sieve MCM 41 and modified MCM 41 were studied by temperature|programmed sulfidization(TPS) technique. The results of TPS indicate that: (1) The order of the interaction intensity of MoO 3 with supports are as follows: {Al-2O-3>}Al-2O-3|MCM 41>MCM 41>TiO-2|MCM 41, thus it can be deduced that TiO-2 weakens the interaction of MoO 3 with MCM 41, while Al-2O-3 strengthens such interaction. (2) On Al-2O-3 support, MoO 3 may interact with CoO to form Co|Mo|O composite phase, however, unlike Al-2O-3, on MCM 41 support, CoO does not obviously affect the character of MoO 3. (3) CoO accelerates the sulfidization of MoO 3 on TiO-2 and Al-2O-3 modified MCM 41.