MoO3/介孔Al2O3催化氧化脱除模拟油中的硫

以环己烷为溶剂，二苯并噻吩（DBT）、苯并噻吩（BT）、4,6-二甲基二苯并噻吩（4,6-DMDBT）、噻吩（Th）作为模型含硫化合物配制成模拟油，在MoO3/介孔Al2O3-H2O2体系中对模拟油催化氧化脱硫进行了研究. 考察了MoO3负载量、氧化剂用量、催化剂用量、氧化反应温度及反应时间对DBT脱除效果的影响. 实验结果表明：在MoO3负载量为20%，催化剂用量为1.5%，氧化剂H2O2与模拟油中硫的摩尔比为4，反应温度为60℃，反应时间为40分钟时DBT脱除率最高，达99.4%，几乎可以被完全脱除；在此条件下模型化合物的氧化反应活性顺序为：DBT > 4,6-DMDBT >BT>Th.

Catalytic Oxidative Desulfurization of Model Oil by MoO3/Mesoporous Al2O3

In the MoO3/mesoporous Al2O3-H2O2 system，a simulated oil consisting of model sulfur compounds, such as benzothiophene (BT) , dibenzothiophene (DBT) ,4 ,6-dimethyldibenzothiophene (4 ,6-DMDBT) and thiophene (Th) , and cyclohexane as solvent was employed in the oxidative desulfurization study .The effects of catalyst, dosage of oxidation agent and reaction condition on desulfurization activity were investigated .It was showed that the removal efficiency of DBT at 60℃ was as high as 99.4% when the content of MoO3, dosage of catalyst and the molar ratio of H2O2 to sulfur were 20% ,1.5% and 4, respectively. Under the optimum conditions, the oxidative activity of the model sulfur compounds follows the order of DBT > 4,6-DMDBT >BT>Th.