Journal of Inorganic Materials ›› 2018, Vol. 33 ›› Issue (9): 956-962.doi: 10.15541/jim20170612

Special Issue: 环境材料

• Orginal Article • Previous Articles     Next Articles

Preparation of High-performance Cu-SAPO-34 Catalysts without Removal of Templating Agents

Xiang-Li KONG1(), Ming-Hui QIU1, Lu YANG1, An-Ran WANG1, Yi-Qun FAN1(), De-Shuang KONG2, Chang-Jun GU2, Xiu-Hua HUAN2, Ling-Ren KONG2   

  1. 1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
    2. Jiangsu Gaochun Ceramics Co., Ltd, Nanjing 211300, China
  • Received:2017-12-28 Revised:2018-02-06 Online:2018-09-20 Published:2018-08-14
  • About author:KONG Xiang-Li. E-mail: ginolax@njtech.edu.cn
  • Supported by:
    National Key R&D Plan (2016YFC0205700);National Natural Science Foundation of China (91534108, 21506093);National High Technical Research Program of China (2012AA03A606);Natural Science Foundation of Jiangsu Province (BK20150947);Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD);"Peak Specialists in Six Industries" High-level Specialist Fund of Jiangsu Province (2012JNHB016)

Abstract:

The pollution of nitrogen oxides has become a serious environmental problem. Selective catalytic reduction (SCR) with zeolites is one of the most effective ways to remove nitrogen oxides. To reduce the cost of the catalysts’ preparation, a facile fabrication method of high-performance Cu-SAPO-34 catalysts without removal of templating agents was proposed. Zeolite slurry containing templating agents was directly applied as a raw material to prepare the Cu-SAPO-34 catalyst followed by pretreatment, ion exchange and one-time calcination. As prepared catalysts were systematically investigated by XRD, BET, TG, ICP, XPS, SEM, TPR, TPD, and NH3-SCR. In the ion exchange process, different pH conditions were studied and optimized. The optimized catalyst with Cu content of 2.43% performed a cubic crystal, high acidity and catalytic activity. The NO conversion rate was more than 80% in the range of 200~450℃, and the highest value was 97.8% obtained at 300℃. Compared with the catalyst prepared from commercial SAPO-34, the as-prepared Cu-SAPO-34 catalysts without removal of templating agents exhibited similar microstructure and catalytic performance. These results indicate that the presence of a small amount of templating agent in the SAPO-34 zeolites makes no difference to fabricate high-performance Cu-SAPO-34 catalysts. It is a feasible method to prepare high-performance Cu-SAPO-34 catalysts without removal of templating agents.

Key words: ion exchange, catalyst, zeolite, template agent

CLC Number: 

  • TQ174