中国炼油与石油化工 ›› 2012, Vol. 14 ›› Issue (3): 75-82.

• Catalyst Research • 上一篇    下一篇

锶的添加对铂系丙烷脱氢催化剂的影响

黄力1,2,周诗健1,周钰明1,张一卫3,张少博1,徐隽2   

  1. 1. 东南大学化学化工学院
    2. 南京沃来德能源科技有限公司
    3. 东南大学
  • 收稿日期:2012-04-05 修回日期:2012-05-12 出版日期:2012-09-30 发布日期:2012-10-22
  • 通讯作者: 周钰明 E-mail:ymzhou@seu.edu.cn
  • 基金资助:
    National Nature Science Foundation of China;Production and Research Prospective Joint Research Project;Technology Support Propgram of Jiangsu Province of China

Effect of Strontium Addition to Platinum Catalyst for Propane Dehydrogenation

Li HUANGShijian Zhou2,Yuming Zhou2,Yiwei Zhang2,Shaobo Zhang2,Jun Xu2   

  • Received:2012-04-05 Revised:2012-05-12 Online:2012-09-30 Published:2012-10-22
  • Contact: Yuming Zhou E-mail:ymzhou@seu.edu.cn
  • Supported by:
    State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (Jilin University) Open Research Fund;Technology Support Propgram of Jiangsu Province of China

摘要: 通过BET吸附、TEM、NH3-TPD, H2-TPR, TPO 和TG等多种表征手段以及催化反应性能评价,研究了锶助剂的添加对PtSn/HZSM-5丙烷脱氢催化剂脱氢反应性能的影响。研究表明锶的添加能同时影响PtSn/HZSM-5的酸功能和金属功能。适量锶的添加(1.2%)可以提高PtSn/HZSM-5催化剂的丙烷脱氢活性,并且能有效抑制反应中积碳的产生。而过量的锶却会导致大量Sn0物种的还原,对脱氢反应不利。随后,为了进一步改善PtSnSr(1.2%)/HZSM-5催化剂的丙烷脱氢性能,再向其负载1.0%的Na,实验结果表明:在本实验中,PtSnNa(1.0%)Sr(1.2%)/HZSM-5催化剂显示出最佳的反应性能,反应5h后,丙烷转化率为32.2%,对应的丙烯选择性在95%以上。

关键词: 锶, 丙烷脱氢, 丙烯, HZSM-5

Abstract: PtSnSr/HZSM-5 catalysts with different amounts of strontium were prepared by sequential impregnation method, and characterized by BET analysis, TEM, NH3-TPD, H2-TPR, TPO and TG. The results showed that the addition of Sr could modify the characteristics and properties of both acid function and metal function of Pt-Sn-based catalysts. In this case, PtSnSr/HZSM-5 catalyst with appropriate amount of Sr (1.2%) showed higher catalytic activity and lower amounts of coke deposits than PtSn/HZSM-5 catalyst. However, excessive content of Sr could facilitate the reduction of Sn, which is disadvantageous to the reaction. Afterwards, 1.0 wt% Na was added into the PtSnSr(1.2%)/HZSM-5 catalyst to improve the catalytic performance of propane dehydrogenation, and this catalyst displayed the best catalytic performance in our experiments. After reaction for 5 h, higher than 95% selectivity toward propene was achieved with a corresponding propane conversion value of 32.2%.

Key words: strontium, propane dehydrogenation, propene, HZSM-5