碳纳米管催化湿式氧化苯酚和苯胺的研究  

Catalytic Wet Air Oxidation of Phenol and Aniline over Multi-walled Carbon Nanotubes

作　　者：李祥[1] 杨少霞[1] 祝万鹏[1] 王建兵[1] 汪莉[2] 

机构地区：[1]清华大学环境科学与工程系,北京100084 [2]北京科技大学土木与环境工程学院,北京100083

出　　处：《环境科学》2008年第9期2522-2528,共7页Environmental Science

基　　金：国家自然科学基金项目(50508017)

摘　　要：以多壁碳纳米管(MWNTs)作为催化剂,在间歇反应装置中开展了催化湿式氧化苯酚和苯胺的活性和稳定性研究,并采用SEM和TEM对MWNTs的结构进行表征.结果表明,MWNTs-B在湿式氧化反应中是高活性、稳定性的催化剂.在160℃,2.5MPa,苯酚和苯胺的浓度分别为1 000 mg/L和2 000 mg/L,催化剂投加量为1.6 g/L条件下,MWNTs-B催化湿式氧化苯酚试验中,反应120 min,苯酚和COD去除率分别为100%和86%;相同条件下,湿式氧化苯胺试验中,反应120 min,苯胺和COD的去除率分别为83%和68%.MWNTs表面的官能团是MWNTs具有高催化活性的重要原因.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 -H2 SO4 ）, displayed excellent activity and stability in the CWAO. Under the reaction temperature of 160℃, the total pressure of 2.5 MPa, the initial concentration of 1 000 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.

关 键 词：碳纳米管 催化湿式氧化 苯酚 苯胺 

分 类 号：X703.1[环境科学与工程—环境工程]