铁酸二钙的制备及催化烧结烟气甲烷的特性研究  

Preparation of dicalcium ferrite and its catalytic properties for methane

作　　者：石焱 宋长鹤 刘建爽 郝克 潘苗苗 Shi Yan;Song Changhe;Liu Jianshuang;Hao Ke;Pan Miaomiao(North China University of Science and Technology,College of Metallurgy and Energy,Hebei Key Laboratory of Modern Metallurgy Technology,Tangshan 063210,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,河北省现代冶金技术重点实验室,河北唐山063210

出　　处：《钢铁钒钛》2022年第4期80-86,共7页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金项目(52174312);河北省自然科学基金项目(E2021209151)。

摘　　要：以九水合硝酸铁和四水合硝酸钙为原料,去离子水为溶剂,柠檬酸为络合剂,氨水调节溶液pH值,以空白堇青石蜂窝为负载体,制备铁酸二钙堇青石蜂窝负载型催化剂。结果表明,柠檬酸用量为钙铁离子总摩尔量的2.5倍,700℃条件下煅烧2 h可制备得到物相单一、结晶度高、孔隙度发达的纳米级铁酸二钙堇青石负载型催化剂。制备得到的纳米级铁酸二钙的比表面积为174.29 m^(2)/g、孔容为0.31423 cm^(3)/g、孔径为7.31 nm、平均孔径为1.89 nm,是一种对甲烷气体(典型烧结烟气VOCs)具有良好催化脱除和矿化性能的非贵金属催化剂。Using Iron(Ⅲ)nitrate nonahydrate and calcium nitrate tetrahydrate as raw materials,deionized water as solvent,citric acid as complexing agent,ammonia water to adjust pH value of solution,blank cordierite honeycomb as support,dicalcium ferrite cordierite honeycomb support type catalyst was prepared.The results show that nanoscale dicalcium ferrite/cordierite honeycomb-supported catalyst with single phase,high crystallinity and developed porosity can be obtained when the molar amount of citric acid is 2.5 times the total amount of calcium and iron ions,and calcinated at 700℃for 2 h.The as-prepared nanosized dicalcium ferrite has a specific surface area of 174.29 m^(2)/g,pore volume of 0.31423 cm^(3)/g,pore size of 7.31 nm,and average pore size of 1.89 nm.It is a kind of non-noble metal catalysts for methane gas(VOCs of typical sintering flue gas)with good catalytic removal and mineralization performance.

关 键 词：铁酸二钙堇青石蜂窝负载型催化剂 溶胶-凝胶法 甲烷 脱除 柠檬酸用量 煅烧温度 

分 类 号：X701[环境科学与工程—环境工程] TQ426[化学工程]