摘要
以γ-Al_2O_3为载体,采用等体积浸渍法制备了MnO_2/γ-Al_2O_3非均相负载型催化剂,并通过扫描电子显微镜(SEM)、X射线衍射(XRD)及N_2吸附-脱附对催化剂进行了表征。在常温、常压下,以空气为氧化剂、MnO_2/γ-Al_2O_3为催化剂,催化氧化硫化钠模拟废水和真实制革含硫废水,评价MnO_2/γ-Al_2O_3的催化氧化脱硫性能。考察了制备催化剂的焙烧温度、锰负载量、反应温度及催化剂用量对氧化脱硫反应的影响。结果表明:当焙烧温度为450℃、锰负载量为10%、催化剂用量为0.1 g/L时,处理硫离子浓度分别为1 000 mg/L和900 mg/L的硫化钠模拟废水和真实制革含硫废水,反应2.5 h后硫离子的去除率分别为92.2%和85%。催化剂重复使用10次,其催化活性几乎没有下降,具有较好的使用寿命。
A new heterogeneous supported catalyst MnO2/γ-Al2-O3 was prepared by impregnation method and characterized by scanning electron microscope,X-Ray Diffraction and N2 adsorption-desorption.The performance of the catalyst for the removal of sulfion from the model and real sulfur-containing tannery wastewater was investigated by air as oxidant at the normal temperature and atmospheric pressure.The influence of calcination temperature,manganese oxide loading,reaction temperature and the catalyst dosage on the removal rate of sulfion was studied.The results indicate that the.MnO2/γ-Al2-O3 catalyst has the best catalytic performance when the calcination temperature is 450℃ and the manganese oxide loading is 10%.The sulfion removal rate of 92.2% and 85% are obtained respectively from the model and real sulfur-containing tannery ,wastewater with 1000 mg/L and 900 mg/L sulfion at the normal temperature and atmospheric pressure,reaction time 2.5 h and catalyst dosage 0.1 g/L.There is no obvious decrease on catalytic activity after ten times recycle of the catalyst.
作者
郭二亮
崔雯谣
吴迪
张灵聪
程宝箴
吕树祥
GUO Erliang;CUI Wenyao;WU Di;ZHANG Lingcong;CHENG Baozhen;LV Shuxiang(College of Chemical Engineering and Materials Science,Tianjin University of Science & Technology,Tianjin 300457,China)
出处
《中国皮革》
CAS
2019年第2期36-42,共7页
China Leather
基金
大学生创新创业训练计划项目(201710057009)
关键词
空气
催化氧化
制革含硫废水
硫离子
去除率
air
catalytic oxidation
sulfur-contained tannery wastewater
sulfion
removal rate
