催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (6): 553-558.

• 研究论文 • 上一篇    下一篇

模型石脑油在硫化Co-Mo/SBA-15催化剂上的加氢异构化反应

张晓艳,石国军,赵鹬,沈俭一   

  1. 南京大学化学化工学院介观化学实验室, 江苏南京 210093
  • 收稿日期:2008-06-25 出版日期:2008-06-25 发布日期:2012-04-28

Hydroisomerization of Model Naphtha over Sulfided Co-Mo/SBA-15 Catalyst

ZHANG Xiaoyan, SHI Guojun, ZHAO Yu, SHEN Jianyi*   

  1. Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu, China
  • Received:2008-06-25 Online:2008-06-25 Published:2012-04-28

PDF

921

被引次数

13

摘要： 通过浸渍法制备了Co/SBA-15、Mo/SBA-15和Co-Mo/SBA-15催化剂,对催化剂的孔结构、物相及表面酸性进行了表征,测定了硫化催化剂上噻吩加氢脱硫及1-己烯加氢异构的反应性能,并与工业Co-Mo/γ-Al2O3催化剂进行了对比. 结果表明, Co-Mo/SBA-15催化剂表面具有较强的B酸中心,且对噻吩加氢脱硫具有较高的催化活性; 而Co-Mo/γ-Al2O3催化剂表面主要为较强的L酸中心,对1-己烯加氢具有较高的催化活性. Mo/SBA-15催化剂的B酸酸性较强,但同时具有较高的1-己烯加氢活性,故它对1-己烯骨架异构的催化活性不高. Co-Mo/SBA-15催化剂的加氢活性相对较低,1-己烯容易在其较强的B酸中心上发生骨架异构反应,具有潜在的工业化应用前景.

关键词: 硫化, 钴, 钼, SBA-15分子筛, 负载型催化剂, 噻吩, 加氢脱硫, 己烯, 骨架异构

Abstract: The Co/SBA-15, Mo/SBA-15, and Co-Mo/SBA-15 catalysts were prepared by the incipient wetness impregnation method. Their textural properties and surface acidity were characterized. In addition, these sulfided catalysts were compared with an industrial Co-Mo/γ-Al2O3catalyst in the hydrodesulfurization (HDS) of thiophene and hydroisomerization of 1-hexene. The results showed that Co-Mo/SBA-15 catalyst exhibited comparable HDS reactivity to the Co-Mo/γ-Al2O3catalyst. The Co-Mo/SBA-15 catalyst exhibited strong Brnsted acidity whereas the Co-Mo/γ-Al2O3catalyst possessed mainly strong Lewis acidity. Although the Mo/SBA-15 catalyst also possessed strong Brnsted acidity, it showed lower catalytic activity for skeletal isomerization of 1-hexene owing to its higher hydrogenation activity. On the other hand, the Co-Mo/SBA-15 catalyst exhibited not only strong Brnsted acidity but also relatively low hydrogenation activity, and hence the skeletal isomerization of 1-hexene over the Co-Mo/SBA-15 catalyst was higher, showing the potential application in industry.

Key words: sulfidation, cobalt, molybdenum, SBA-15 zeolite, supported catalyst, thiophene, hydrodesulfurization, hexene, skeletal isomerization