CuMgLa/γ-Al2O3湿式催化氧化降解苯酚的研究  

Phenol Degradation by Catalytic Wet Air Oxidation on CuMgLa/γ-Al2O3

作　　者：马建超[1] 任凯文 张晓朋 郭精茂 马清亮[2] MA Jianchao;REN Kaiwen;ZHANG Xiaopeng;GUO Jingmao;MA Qingliang(College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Coal Science and Technology,Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学矿业工程学院,太原030024 [2]太原理工大学煤科学与技术教育部与山西省重点实验室,太原030024

出　　处：《太原理工大学学报》2020年第5期655-662,共8页Journal of Taiyuan University of Technology

基　　金：国家重点研发计划项目(2019YFC0408604-4);山西省重点研发计划(社会发展领域)项目(201903D321053);山西省自然科学基金项目(201801D121273);山西省留学回国人员科研项目(HGKY2019017);山西省优秀青年学术带头人。

摘　　要：采用共沉淀法成功制备了CuMgLa/γ-Al2O3催化剂,以反应温度、苯酚初始浓度、催化剂用量、反应压力、反应时间和转速为单因素,研究苯酚和COD的去除效果。结果表明,反应温度为180℃、苯酚初始质量浓度2000 mg/L、催化剂用量0.2 g/L、反应压力1.8 MPa、反应时间120 min、转速500 r/min时,苯酚去除率接近100%,COD去除率达90.65%.从XRD、XPS、NH3-TPD和TG-DTA研究发现,添加Mg和La后,CuO的平均粒径从51 nm分别降至37和25 nm,表明CuMgLa/γ-Al2O3中CuO分散得更好,可提供更多的反应位点。掺杂Mg和La减弱了Cu/γ-Al2O3中强酸位,减少了CuMgLa/γ-Al2O3湿式催化氧化降解苯酚过程积碳行为的发生。CuMgLa/γ-Al2O3 catalyst was prepared by the co-precipitation method and evaluated by phenol degradation.When catalyst dosage was 0.2 g/L,reaction temperature was 180℃,reaction pressure was 1.8 MPa,and stirring speed was 500 r/min,2000 mg/L phenol could be completely removed,and COD removal could reach 90.65%in 120 minutes.The catalysts were analyzed by XRD,XPS,NH3-TPD,and TG-DTA.It’s found that the average particle size of CuO decreased from 51 nm to 37 nm and 25 nm with the addition of Mg and La,respectively,indicating that CuO on CuMgLa/γ-Al2O3 had a better dispersion and provided more reaction sites.Moreover,introduction of Mg and La into Cu/γ-Al2O3 could weaken the strong acid sites of Cu/γ-Al2O3,thus reducing carbon deposition during phenol degradation.

关 键 词：湿式催化氧化 CuMgLa/γ-Al2O3 苯酚 降解 积碳 

分 类 号：X703.1[环境科学与工程—环境工程]