Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (1): 173-180.doi: 10.3866/PKU.WHXB201411131

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Removal of Volatile Organic Compounds at Low Temperature by a Self-Assembled Pt/γ-Al2O3 Catalyst

LI Jia-Heng1, AO Ping1, LI Xiao-Qing1, XU Xiang-Sheng1, XU Xiao-Xiao1, GAO Xiang2, YAN Xin-Huan1   

  1. 1. State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China;
    2. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310014, P. R. China
  • Received:2014-07-11 Revised:2014-11-13 Published:2014-12-25
  • Contact: YAN Xin-Huan E-mail:xinhuanyan139@hotmail.com
  • Supported by:

    The project was supported by the Key Innovation Team of Science&Technology in Zhejiang Province, China (2011R50017) and National High Technology Research and Development Programof China (863) (2013AA065005).

Abstract:

Pt/γ-Al2O3 catalyst nanoparticles were prepared by self-assembly (AS) and wetness impregnation (WI) methods, and evaluated for the oxidation of volatile organic compounds including toluene, isopropanol, acetone, and ethyl acetate. The morphology, structure, and surface properties of the catalyst particles were correlated to their oxidation activity. Toluene, isopropanol, acetone, and ethyl acetate (1000×10-6, volume fraction) in the feed stream (gas hourly space velocity of 18000 mL·g-1·h-1) were completely oxidized and removed by Pt/γ-Al2O3-AS at below 130, 135, 145, and 215℃, respectively. Pt/γ-Al2O3-AS exhibited outstanding activity and stability at high concentrations and space velocities. The high catalytic activity of Pt/γ-Al2O3-AS was attributed to its high surface area, small size, finely dispersed Pt nanoparticles, better reproducible activity at lowtemperature, and a higher number of hydroxyl groups.

Key words: Pt/γ-Al2O3, Volatile organic compound, Catalytic combustion, Assembled catalyst

MSC2000: 

  • O643