화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.28, 202-210, August, 2015
DOI10.1016/j.jiec.2015.02.015  Export Citation
Hydro-purification of crude terephthalic acid using palladium catalyst supported on multi-wall carbon nanotubes
S. Tourani1, F. Khorasheh2, †, A.M. Rashidi3, and A.A. Safekordi1, 2
  • 1Department of Chemical Eng., College of Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
  • 2Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
  • 3Nanotechnology Research Center, Research Institute of the Petroleum Industry, Tehran, Iran
E-mail:
Palladium catalysts supported on functionalized multi-wall carbon nanotubes were synthesized for hydro-purification of crude terephthalic acid containing 2100 ppm 4-carboxybenzaldehyde (4-CBA) as impurity. PdCl2 and Pd(OAc)2 were used as precursors. Palladium loadings were 0.05 to 0.6 wt.% with catalysts reduced at 200 to 400 8C. Catalysts prepared from both precursors with least 0.3 wt.% palladium resulted in 99%+ removal of 4-CBA. The most desired selectivity was obtained for the catalyst with PdCl2 as precursor, reduction temperature of 300 8C, and palladium loading of 0.3 wt.%. This catalyst had slightly better performance than the commercial catalyst (0.5 wt.% of palladium on activated carbon).
Keywords:Crude terephthalic acid;4-Carboxybenzaldehyde;Hydro-purification;Palladium catalyst;Carbon nanotubes
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