臭氧催化氧化深度处理炼油废水催化剂的开发

摘要

以金属硝酸盐为原料,采用等体积浸渍法制备了CuMnCo/γ - Al2O3催化剂,通过臭氧催化氧化中试试验装置,对炼油厂废水的二级处理出水进行深度研究.累计1000h的反应结果表明,在保证出口COD为100 mg·L-1以下,炼油废水的CODCr平均去除率达到60.3％.通过物理吸附、热重-差热、扫描电镜、X射线衍射和X射线荧光光谱等对催化剂使用前后进行了表征,表明催化剂在反应后比表面积、孔结构、活性组分的含量、晶粒大小和晶型均未发生变化,反应后催化剂上无有机物残留.催化剂的催化活性好,去除率高,性能稳定,在累计反应时间1000h无失活迹象.%Using metal nitrate as the raw materials,CuMnCo/-y-Al203 catalyst was prepared by isometric impregnation method. The advanced treatment of secondary treated refinery wastewater was investigated in the pilot scale test apparatus by ozone catalytic oxidation. The catalysts before and after reaction were characterized by BET, XRF, XRD, TGA-DSC and SEM. The results showed that COD& average removal efficiency of 60. 3% was attained when the outlet CODCr was controlled within 100 mg ? L"1. The catalyst exhibited higher catalytic activity and stability, and no obvious evidence of deactivation when the catalyst was observed after running for 1 000 h. The surface area,pore structure,active component contents,crystal size and structure had no change, and organic compounds had no remains on the surface of the catalyst after reaction.