检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:高巍[1] 于心玉[2] 赵建忠[1] 程文萍[1,2] 杨建国[2]
机构地区:[1]太原理工大学化学化工学院,山西太原030024 [2]华东师范大学化学系,上海市绿色化学与化工过程绿色化重点实验室,上海200062
出 处:《化工学报》2013年第4期1438-1443,共6页CIESC Journal
基 金:中国博士后科学基金项目(2012M510782);国家自然科学基金项目(51204120);山西省基础研究计划项目(2011011005)~~
摘 要:采用共沉淀法制备三元类水滑石MgAlX(X=Fe、Cu、Zn)和四元类水滑石MgAlFeX(X=Zn、Ce、Cu),经700℃焙烧6h后制备了含有不同金属元素的FCC硫转移剂。通过XRD、氮吸附以及改装的WRP-3热重天平对硫转移剂的结构和SO2氧化还原性能进行表征。结果表明,引入不同金属元素均可以得到结构规整的三元、四元类水滑石前驱体,经过焙烧后得到复合氧化物。三元类水滑石中Zn不具有促进硫转移剂的氧化还原性能,Fe可作为硫转移剂的氧化还原促进剂,Cu可作为优良的氧化促进剂。与MgAlFeZn和MgAlFeCe相比,四元类水滑石MgAlFeCu(n(Mg2+)/n(Al 3+)=3,m(Fe)=8%,m(Cu)=1%)中Fe和Cu协同作用,使其饱和硫容、氧化吸硫和还原脱硫的性能均有所提高,6min达到饱和硫容1.33g.g-1,同时具有较强的还原能力。A series of iron-,copper-,zinc-,cerium-,magnesium-and aluminum-containing ternary and quaternary hydrotalcite-like compounds were prepared by coprecipitation and characterized by XRD and N2 adsorption-desorption.All samples prepared were calcined at 700℃ for 6 h to obtain metal complex oxides whose structure and SO2 redox performance were measured in a modified WRP-3 thermal balance.The results showed that zinc was not effective for redox of SO2 and copper was an efficient promoter for oxidization of SO2 to SO3,while iron could play dual role of oxidizing and reducing promoter.In quaternary hydrotalcite-like compounds MgAlFeCu(n(Mg2+)/n(Al3+)=3,m(Fe)=8%,m(Cu)=1%)showed synergistic effect between Fe and Cu,which resulted in its higher oxidative adsorption rate,larger adsorption capacity and better reductive ability,and its total saturation adsorption capacity could be 1.33 g·g-1 in 6 min.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.62