催化学报 ›› 2013, Vol. 34 ›› Issue (12): 2271-2276.DOI: 10.1016/S1872-2067(12)60745-1

• 研究论文 • 上一篇    

碳纳米管-氧化铝: 高抗硫及再生性能的Pt基催化剂载体及在NOx还原反应中的应用

江莉龙, 王玉玲, 刘弦, 曹彦宁, 魏可镁   

  1. 福州大学化肥催化剂国家工程研究中心, 福建福州350002
  • 收稿日期:2013-09-14 修回日期:2013-10-21 出版日期:2013-11-25 发布日期:2013-11-25
  • 通讯作者: 江莉龙
  • 基金资助:

    国家自然科学基金(21073039);福建省自然科学基金(2013J05025).

Alumina-carbon nanotube supports for sulfur-resistant regenerable Pt-based catalysts in NOx reduction

Lilong Jiang, Yuling Wang, Xian Liu, Yanning Cao, Kemei Wei   

  1. National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, Fujian, China
  • Received:2013-09-14 Revised:2013-10-21 Online:2013-11-25 Published:2013-11-25
  • Contact: Lilong Jiang
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21073039) and the Natural Science Foundation of Fujian Province (2013J05025).

摘要:

通过乙炔在Al2O3上的分解制备碳纳米管-氧化铝(Al2O3-CNTs)载体. 采用浸渍法, 分别制备了Pt/Ba/Al2O3-CNTs和Pt/Ba/Al2O3催化剂. 利用XRD, SEM, TEM, 低温N2物理吸附, XPS和in-situ DRIFTS等手段对催化剂的物化性质进行了表征. 结果表明, 在SO2存在下的NOx还原反应中, Pt/Ba/Al2O3-CNTs比Pt/Ba/Al2O3具有更高的抗SO2性能和再生性能. In-situ DRIFTS表明SO2的存在对NOx储存还原的途径没有影响.

关键词: 碳纳米管, 氮氧化物净化, 二氧化硫中毒, 再生

Abstract:

Alumina-carbon nanotube (Al2O3-CNT) supports were prepared by the decomposition of acetylene on Al2O3. The subsequent impregnation of Pt and Ba yielded Pt/Ba/Al2O3-CNT. Pt/Ba/Al2O3-CNT was characterized by X-ray diffraction, scanning and transmission electron microscopies, N2 physisorption, X-ray photoelectron spectroscopy, and in-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The relationship between the structure and properties of Pt/Ba/Al2O3-CNT was investigated. Pt/Ba/Al2O3-CNT exhibited much higher resistance to SO2 poisoning and better regeneration ability than Pt/Ba/Al2O3, during NOx reduction in the presence of SO2. In-situ DRIFTS spectra suggested that SO2 had no effect on the NOx storage and reduction process.

Key words: Carbon nanotube, Oxynitride elimination, Sulfur dioxide poisoning, Regeneration