碱渣废水湿式氧化催化剂的研究  

Research on catalyst for wet oxidation of spent caustic wastewater

作　　者：王华[1] 齐贺[1] 李光明[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《工业用水与废水》2007年第6期76-80,共5页Industrial Water & Wastewater

基　　金：国家高技术研究发展计划(863)资助(2002AA601260)

摘　　要：选择了Cu、Mn、Cu-Mn-Ce、Cu-Mn、Mn-Ce、Cu-Zn和Cu-Mn-Co七种活性组分,负载于-γAl2O3上,试验制备催化剂并对其用于碱渣废水湿式氧化的活性和稳定性进行了研究,结果表明MnOx/-γAl2O3在反应温度为200℃,室温下氧分压为1.0 MPa,反应搅拌速率为200 r/min,反应时间为2 h的试验条件下具有良好的催化性能;对COD、硫化物、挥发酚的质量浓度分别为16 149、19、3 326 mg/L,pH值为10.0的碱渣废水,经过酸化预处理的中和水通过该催化剂的催化湿式氧化处理,COD的去除率可达86.6%;同时,对MnOx/-γAl2O3负载型催化剂的制备条件也进行了研究和优化,并通过X射线衍射、BET比表面分析和孔径分析等对催化剂性能作了进一步研究,结果表明,550℃的焙烧温度下催化剂的活性成分是呈自发单层分散状态的不同价态的氧化锰,随着反应的进行,5～11 nm范围内的孔体积有较明显的减少,比表面积和孔总体积都有所下降,活性组分有部分溶出。Seven kinds of active components including： Cu, Mn, Cu-Mn-Ce, Cu-Mn, Mn-Ce, Cu-Zn and Cu- Mn-Co were selected and supported on 7-Al2O3, the test prepared the catalysts and studied their activity and stability during the wet oxidation of the spent caustic wastewater. The results of the test showed that when the reaction temperature was 200℃, the oxygen partial pressure under room temperature was 1.0 MPa, the reaction stiring rate was 200 r/min, the reaction time was 2 h, the catalytic performance of MnOx/T-Al2O3 was good, for the spent caustic wastewater that the mass concentration of COD, sulfid, volatile phenol were 16 149, 19, 3 326 mg/L respectively and the pH value was 10.0, the COD removal rate of its effluent water after the acidification pretreatment could reached 86.6% through the catalytic wet oxidation with the said catalyst; meanwhile, the condition for the preparation of MnOx/γ-Al2O3 supported catalyst was studied and optimized, through the X-ray diffraction, BET specific surface and aperture analysis, the performance of the catalyst was further studied. The results indicated that, the activity component of MnOx/γ-Al2O3 prepared under calcination temperature 550℃ was composed of manganese oxide of different valence which is in spontaneous single-layer dispersion in the surface of the carrier, with the reaction processing, the specific surface area and the whole core volume of the catalyst was reduced somewhat, especially for the holes in 5 - 11 nm, and the active components were dissolved out partially.

关 键 词：碱渣废水 催化剂 催化湿式氧化 

分 类 号：X703.5[环境科学与工程—环境工程] O643.36[理学—物理化学]