Co-Mo/SBA-15深度加氢脱硫催化剂的研究

RESEARCH OF Co-Mo/SBA-15 DEEP HYDRODESULFURIZATION CATALYST

以介孔分子筛SBA-15为载体,担载Co-Mo双金属活性组分制备了深度加氢脱硫催化剂。通过XRD、BET表征,担载金属后SBA-15分子筛仍然保持二维晶相结构,比表面积略有下降。用0.5%二苯并噻吩(DBT)的环己烷溶液为模型化合物,在固定床反应器上考察了金属负载量的影响及最佳反应条件,并用高硫催化裂化柴油为原料评价了催化剂的脱硫反应活性。结果表明,当催化剂负载Co-Mo(5,25)时,在反应温度360℃、压力4MPa、氢油体积比400、体积空速4.0h-1的条件下,催化裂化柴油脱硫率最高可以达到95.59%。

High performance hydrodesulfurization（HDS）catalysts were prepared by depositing Co-Mo sulfides on meso-porous SBA-15 molecular sieve. The prepared catalysts were characterized by means of XRD and BET techniques. Results showed that the prepared catalyst preserved well-ordered 2D hexagonal structure of SBA-15, yet its specific surface area was a bit low. On fixed bed reactor using 0.5% DBT cyclohexane solution as model compound, the influence of metal compositions and the optimum reaction conditions were investigated. Using a high sulfur content FCC diesel fraction as feed,the HDS activity of the catalyst loaded with 5o/oo Co and 25% Mo were tested under the conditions of a reaction temperature of 360 ℃,a reaction pressure of 4 MPa,a hydrogen/oil ratio of 400 and a WHSV of 4.0 h^-1 ＇ the maximum HDS rate reached 95.59%.