Li Xiang, Yang Shao-xi, Zhu Wan-peng, Wang Jian-bing, Wang Li
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
Huan Jing Ke Xue. 2008 Sep;29(9):2522-8.
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.
将不含任何金属离子的多壁碳纳米管（MWNTs）用作催化剂，并在间歇式反应器中对其在苯酚和苯胺的催化湿式空气氧化（CWAO）中的性能进行了研究。通过扫描电子显微镜（SEM）和透射电子显微镜（TEM）对MWNTs的结构进行了表征。结果表明，经混合酸（HNO₃-H₂SO₄）处理的MWNTs在CWAO中表现出优异的活性和稳定性。在反应温度为160℃、总压力为2.5MPa、初始浓度为1000mg/L且催化剂负载量为1.6g/L的条件下，苯酚的CWAO反应120min后，苯酚去除率达到100%，化学需氧量（COD）去除率为86%。在相同操作条件下，当苯胺初始浓度为2000mg/L时，苯胺溶液的CWAO中苯胺去除率为83%，COD去除率为68%。表面官能团对MWNTs在有机化合物CWAO中的高活性起着重要作用。
