介孔分子筛催化剂Co-Mo/SBA-15的制备及其加氢脱硫性能

 以介孔分子筛SBA-15为载体，采用浸渍法制备了Co-Mo/SBA-15催化剂。采用XRD、BET、FT-IR、TEM等测试手段对样品进行了分析。用0.5% 二苯并噻吩（DBT）的环己烷溶液为模型化合物，在固定床反应器上评价了Co-Mo/SBA-15的催化活性。结果表明，担载金属后的SBA-15分子筛仍然具有高度有序的二维六方介孔结构，金属颗粒高度分散。当MoO₃的负载量增加到25%时，分散度有所降低，部分MoO₃以聚集态存在于载体表面。含5%CoO和25%MoO₃的Co-Mo/SBA-15催化剂具有最高的加氢脱硫活性，硫质量分数由490μ g/g降至11μ g/g，DBT的脱硫率可达97.75%。

PREPARATION AND HYDRODESULFURIZATION PERFORMANCE OF MESOPOROUS SIEVE CATALYST Co-Mo/SBA-15

Co-Mo/SBA-15 catalyst was synthesized by the wetness impregnation with SBA-15 mesoporous sieve as carrier. The sample was characterized by XRD、BET、FT-IR、TEM. The activity of Co-Mo/SBA-15 was evaluated by using cyclohexane solution of 5% debenthiophene (DBT) as model compound in the fixed-bed reactor. The result showed that the metal carried SBA-15 molecular sieve still had highly ordered two-dimensional hexagonal mesoporous structure. The metal grain highly dispersed in SBA-15. The dispersity of Mo was brought down and a part of MoO₃ formed he state aggregation when the loading of MoO₃ was up to 25%. The Co-Mo/SBA-15 catalyst containing 5% CoO and 25% MoO₃ had the highest activity of hydrodesulfurization. The desulfurization rate of DBT could reach 97.75%, the mass fraction of sulfur in the model sample reduced from 490μg/g to 11μg/g.