Fe/beta分子筛催化N2O分解  

Study of Fe/beta zeolite in catalytic N_2O decomposition

作　　者：徐冰 高春光[1] 王永钊[1] 赵永祥[1] Xu Bing;Gao Chunguang;Wang Yongzhao;Zhao Yongxiang(Engineering Research Center of Fine Chemicals Ministry of Education,School of Chemistry and Chemical Engineering,Shanxi University,Taiyuan 030006,Shanxi,China)

机构地区：[1]山西大学化学化工学院,精细化学品教育部工程研究中心,山西太原030006

出　　处：《工业催化》2018年第1期36-41,共6页Industrial Catalysis

基　　金：国家自然科学基金(21673132);山西省国际合作项目(201603D421025)

摘　　要：通过液相离子交换法对H-beta分子筛进行改性得到Fe/beta分子筛,并应用于催化N2O直接分解反应,考察加入HNO3后的体系pH值对Fe/beta催化性能的影响。采用N2物理吸附-脱附、XRD、IR、DR UV-Vis、NH3-TPD和ICP-OES等对Fe/beta分子筛进行分析表征。结果表明,溶液pH值降低过程中催化剂的结晶度、比表面积、孔容及Fe3+含量呈现先增加后减少。溶液pH为2.0时所制备的Fe/beta分子筛催化N2O完全分解温度明显低于pH为2.6和1.0时制备的Fe/beta催化剂,显示了较好的催化活性。The modified Fe/beta zeolite was prepared by liquid ion exchange method of H-beta.The Fe/beta was used in the catalytic decomposition of N2O,in which the effect of the system pH after adding HNO3 was studied.The structure and properties of the Fe/beta were characterized by N2-physical adsorption-desorption,XRD,IR,DR UV-Vis,NH 3-TPD and ICP-OES.The results showed that the crystallinity,specific surface area,pore volume and Fe 3+content of the catalysts increased first and then decreased during the process of solution pH reduced.The temperature of complete decomposition of Fe/beta zeolite prepared at the pH of 2.0 whose better catalytic activity was better was obviously lower than that of the catalysts prepared at the pH of 2.6 and 1.0.

关 键 词：催化化学 Fe/beta分子筛 液相离子交换 N2O直接分解 

分 类 号：TQ424.25[化学工程] O643.36[理学—物理化学]