[Catalytic wet air oxidation of phenol and aniline over multi-walled carbon nanotubes].
Multi-walled carbon nanotubes (MWNTs) without any metal ions were used as the catalyst, and investigated in the CWAO of phenol and aniline in a batch reactor. The structures of the MWNTs were characterized by means of SEM and TEM. It showed that the MWNTs, treated with the mixed acid (HNO3-H2SO4), displayed excellent activity and stability in the CWAO. Under the reaction temperature of 160 degrees C, the total pressure of 2.5 MPa, the initial concentration of 1000 mg/L and loading the catalyst of 1.6 g/L, 100% phenol and 86% COD were removed after 120 min reaction in CWAO of phenol. At the same operating conditions, 83% aniline and 68% COD removals were obtained in the CWAO of aniline solution when the initial concentration of aniline was 2 000 mg/L. The surface functional groups played the important role for the high activity of the MWNTs in CWAO of organic compounds.
Li
Xiang
X
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. lixiang980227@gmail.com
Yang
Shao-xi
SX
Zhu
Wan-peng
WP
Wang
Jian-bing
JB
Wang
Li
L
D000814:Aniline Compounds / Q000737:chemistry*; D019149:Bioreactors; D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D043942:Nanotubes / Q000737:chemistry*; D010084:Oxidation-Reduction; D019800:Phenol / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*
D000814:Aniline Compounds; D019800:Phenol; D002244:Carbon; C023650:aniline