煤化工废水用改性分子筛催化剂的研制与表征  

Preparation and Characterization of Modified Molecular Sieve Catalyst for Coal Chemical Wastewater

作　　者：王镜惠 刘娟[2] 曹宇 王亚俐 WANG Jing-hui;LIU Juan;CAO Yu;WANG Ya-li(School of Chemistry&Chemical Engineering,Yulin University,Yulin Shaanxi 719000,China;College of Life Sciences,Yulin University,Yulin Shaanxi 719000,China;Environmental Engineering Assessment Center,Ecological Environment Bureau,Yulin Shaanxi 719000,China)

机构地区：[1]榆林学院化学与化工学院,陕西榆林719000 [2]榆林学院生命科学学院,陕西榆林719000 [3]榆林市生态环境局环境工程评估中心,陕西榆林719000

出　　处：《当代化工》2023年第3期601-608,共8页Contemporary Chemical Industry

基　　金：榆林市科技计划项目,煤化工污水资源化利用技术研究(项目编号:2018-2-53)。

摘　　要：采用等体积浸渍法以ZSM-5分子筛为载体,制备负载分子筛催化剂。分别研究了不同活性物质、前驱体盐、焙烧温度和活性物质载量对催化剂性能的影响。通过BET检测、N_(2)吸附-脱附等温线、催化剂孔径分布、CWOO评价(包括催化剂抗硅性、间甲酚转化率和TOC去除率)方法对催化剂性能进行表征。研究表明:采用前驱盐Fe(NO_(3))_(3)·9H_(2)O和活性组分Fe对载体ZSM-5分子筛进行负载,且活性组分负载量达到4%(质量分数),并用500℃进行焙烧,制备出的负载分子筛催化剂具有较好的抗硅性、较高的间甲酚转化率与TOC去除率,综合性能最好。Supported zeolite catalyst was prepared by using ZSM-5 molecular sieve as carrier with equal volume impregnation method.The effects of different active substances,precursor salts,calcination temperature and active material loading on the performance of the catalyst were studied.The catalyst performance was characterized by BET detection,N_(2) adsorption desorption isotherm,catalyst pore size distribution,CWOO evaluation(including catalyst silicon resistance,m-cresol conversion and TOC removal).The research showed that when the ZSM-5 molecular sieve was supported by the precursor salt Fe(NO_(3))_(3)·9H_(2)O and the active component Fe,and the loading amount of the active component reached 4%(mass fraction),and the catalyst was calcined at 500℃,the prepared supported molecular sieve catalyst had good silicon resistance,high m-cresol conversion rate and TOC removal rate,and the overall performance was the best.

关 键 词：分子筛催化剂 比面积 孔容 废水处理 

分 类 号：X784[环境科学与工程—环境工程]