摘要
采用浸渍法制备了RuO2/γ-Al2O3和RuO2-CeO2/γ-Al2O3催化剂,利用XRD,XPS和ESR分析了催化剂的结构,并研究了湿式氧化降解苯酚的活性.结果表明,两种催化剂表面RuO2均有良好的分散性,并且催化剂表面存在氧空位和化学吸附氧,CeO2的掺杂使催化剂表面氧空位和化学吸附氧数量增加.两种催化剂对湿式氧化降解苯酚具有良好的催化活性,当苯酚质量浓度为4200mg/L,在150℃和3MPa下,RuO2/γ-Al2O3催化剂湿式氧化降解苯酚反应150min后,苯酚全部被去除,RuO2-CeO2/γ-Al2O3催化剂反应60min后,苯酚的去除率为96%.
In this paper, RuO_2/γ-Al_2O_3 and RuO_2-CeO_2/γ-Al_2O_3 catalysts were prepared by the impregnation method. The structure of the catalysts was investigated by XRD, XPS and ESR. The catalytic activity was studied in the wet air oxidation(WAO) of phenol. The results show that the dispersion of RuO_2 particles is higher on RuO_2-CeO_2/γ-Al_2O_3 catalyst than that on RuO_2/γ-Al_2O_3 catalyst. There were oxygen deficiencies and chemisorbed oxygen on the surface of the two catalysts. Moreover, the amount of them increased after the addition of CeO_2 into RuO_2/γ-Al_2O_3 catalyst. RuO_2/γ-Al_2O_3 and RuO_2-CeO_2/γ-Al_2O_3 catalysts have a good activity in WAO of phenol. At a mass concentration 4 200 mg/L of phenol, 150 ℃ and 3 MPa, phenol was totally removed after 150 min over RuO_2/γ-Al_2O_3 catalysts, and the phenol removal ratio was 96% after a 60 min reaction over RuO_2-CeO_2/γ-Al_2O_3 in WAO.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期897-901,F007,共6页
Chemical Journal of Chinese Universities
基金
国家高技术研究发展规划"八六三"计划项目(批准号:2000AA601260)
中国博士后自然科学基金资助.
关键词
湿式氧化
苯酚
Ru催化剂
CEO2
废水处理
Wet air oxidation(WAO)
Phenol
Ru catalyst
CeO_2
Wastewater treatment
