OMS-2催化剂成型工艺研究及其在印染废水处理中的应用  

Study on forming process of OMS-2 catalyst and its application in printing and dyeing wastewater treatment

作　　者：孙孟玲 孟旭[2] 陈革新 龚雨杰[1] 苟明霞 赵培庆 Sun Mengling;Meng Xu;Chen Gexin;Gong Yujie;Gou Mingxia;Zhao Peiqing(Yiwu R&D Center for Functional Materials,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Yiwu 322000,Zhejiang,China;Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,Gansu,China)

机构地区：[1]义乌市中科院兰州化物所功能材料中心,浙江义乌322000 [2]中国科学院兰州化学物理研究所,甘肃兰州730000

出　　处：《工业催化》2020年第3期43-47,共5页Industrial Catalysis

摘　　要：以OMS-2粉体催化剂为基础,对催化剂进行挤出成型,考察粘结剂种类、粘结剂用量、润滑剂和孔结构改进剂用量、焙烧温度对成型催化剂机械强度的影响。得到最佳成型工艺条件为,粘结剂硅溶胶用量为OMS-2粉体催化剂质量的105%~110%、辅助粘结剂纳米ZrO 2用量为OMS-2粉体催化剂质量的30%~35%、润滑剂田菁粉用量为OMS-2粉体催化剂质量的2.5%~3.0%、孔结构改进剂柠檬酸用量为OMS-2粉体催化剂质量的5%~6%,焙烧温度450℃。成型后催化剂机械强度可达150 N·cm-1,满足工业化应用对催化剂强度的要求。将成型催化剂应用于催化湿式氧化印染废水处理,经过432 h活性评价时间,COD平均去除率约91.6%,反应结束后催化剂结构完整,平均机械强度约144 N·cm-1,表现出良好的水热稳定性。OMS-2 powder catalyst is extruded and optimized by tuning forming conditions and additives.The best process conditions are that the binder silica sol dosage is 105%~110%of OMS-2 powder,the auxiliary binder nano-ZrO 2 dosage is 30%~35%of OMS-2 powder,the lubricant sesbania powder dosage is 2.5%~3.0%of OMS-2 powder,and the pore structure improving agent citric acid dosage is 5%~6%of OMS-2 powder,the calcination temperature is preferably 450℃.After forming,the mechanical strength of the catalyst can reach 150 N·cm-1,which meets the requirements of catalyst strength for industrial applications.The shaped catalyst is applied to the catalytic wet oxidation printing wastewater treatment.After 432 h of activity evaluation,the average removal efficiency of COD is about 91.6%.After reaction,the catalyst structure is complete,and the average mechanical strength can still be 144 N·cm-1,showing good hydrothermal stability.

关 键 词：催化剂工程 OMS-2催化剂 机械强度 催化湿式氧化 水热稳定性 

分 类 号：TQ426.6[化学工程] X703[环境科学与工程—环境工程]