文献类型：期刊文献

中文题名：铜锰基催化剂浆液特性对其在堇青石载体上的负载量及粘附性的影响

英文题名：Effect of Slurry Characteristics of Copper-Manganese-Based Catalyst on Its Loading Mass and Adhesivity on Cordierite Substrate

作者：左家玉[1];刘应书[1];张璇[1];侯环宇[2];杨雄[1];张传钊[3];孙方舟[2];李子宜[1]

第一作者：左家玉

机构：[1]北京科技大学能源与环境工程学院,北京100086;[2]河钢集团战略研究院,石家庄050023;[3]北京联合大学生物化学工程学院,北京100101

第一机构：北京科技大学能源与环境工程学院,北京100086

年份：2023

卷号：51

期号：4

起止页码：966-974

中文期刊名：硅酸盐学报

外文期刊名：Journal of The Chinese Ceramic Society

收录：CSTPCD;;EI(收录号：20231714023858);Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：河钢集团有限公司重点科技项目(HG2022144);中央高校基本科研业务费(FRF-IDRY-GD21-002)。

语种：中文

中文关键词：负载型催化剂;真空涂敷;流变性;黏度;Zeta电位

外文关键词：coated catalyst;vacuum coating;rheology;viscosity;Zeta potential

摘要：随着大流量工业烟气净化对低气阻技术的迫切需求,负载型催化剂备受关注,然而涂敷浆液特性复杂、对负载的影响因素繁多,使催化剂制备带来挑战.针对铜锰基催化剂在堇青石载体上的真空涂敷制备,探究了固含量,粘结剂种类,pH值和粒径等浆液特性对催化剂负载量和粘附性的影响规律.结果表明:固含量的升高使得催化剂颗粒可以与增稠剂和硅溶胶形成的网状结构更紧密结合,提高了催化剂负载量和粘附性;硅溶胶可有效增加浆液电负性,使浆液内催化剂颗粒分散均匀;pH值的增大使浆液Zeta电位减小,减小浆液黏度并改善稳定性;而球磨会破坏浆液均匀稳定的网状结构,不利于催化剂粘附性.优选硅溶胶质量分数为30%、pH值为7.3、固含量为30%(质量分数)的未球磨浆液,得到负载量为216 kg·m^(–3)、脱落率为0.6%,CO催化效率大于98%(7200 h^(–1)、120℃、8%H2O)的负载型催化剂.
Coated catalysts have attracted much attention due to the urgent need of low-resistance technology for large-flow industrial flue gas purification.However,the complex characteristics of coating slurry and the factors influencing the loading for the catalyst preparation become a challenge.For the preparation of Cu-Mn based catalyst by vacuum coating on cordierite substrate,the influence of slurry characteristics(i.e.,solid content,binder type,pH value and particle size)on the loading mass and adhesivity of catalyst was investigated.The results show that the increase of solid content makes the catalyst particles more closely bound to the network structure formed by thickener and silica sol,and improves the loading mass and adhesivity of the catalyst.Silica sol can effectively increase the electronegativity on the surfaces of the particles in the slurry,thus leading to the dispersion of the catalyst particles in the slurry.The increase of pH value reduces the zeta potential on the particle surface,reduces the slurry viscosity and improves the slurry stability.Grinding can destroy the uniform and stable network structure of the slurry,affecting the catalyst adhesivity negatively.A coated catalyst with a loading mass of 216 kg'm-3,a shedding rate of 0.6%,and a catalytic CO efficiency of greater than 98%(7200 h,120 C,8%H20)is obtained when an unground slurry with a silica sol content of 30%(in mass fraction),pH value of 7.3 and solid content of 30%(in mass fraction)is used.