CuYO/γ-Al_2O_3催化剂催化分解N_2O性能  

Catalytic decomposition of N_2O over CuYO/γ-Al_2O_3 catalysts

作　　者：仇杨君 黄思齐 庞子涛 宋永吉 王新承 李翠清 王虹 QIU Yangjun;HUANG Siqi;PANG Zitao;SONG Yongji;WANG Xincheng;LI Cuiqing;WANG Hong(Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology,College of Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing,102617,China;College of Chemical Engineering,Beijing University of Chemical Technology,Beijing,100029,China)

机构地区：[1]北京石油化工学院化学工程学院燃料清洁化及高效催化减排技术北京市重点实验室,北京102617 [2]北京化工大学化学工程学院,北京100029

出　　处：《环境化学》2018年第7期1591-1598,共8页Environmental Chemistry

基　　金：国家自然科学基金(21076025)资助~~

摘　　要：通过等体积浸渍法制备了以γ-Al_2O_3为载体,CuO、Y_2O_3双组分CuYO/γ-Al_2O_3催化剂,通过CuYO/γ-Al_2O_3催化剂的XRD,BET,SEM等表征,分析发现,引入Y_2O_3组分,能够改变催化剂颗粒的结构与形态,提高了CuO在催化剂表面及孔道内的分散度.通过H2-TPR研究发现掺杂Y_2O_3大幅提高了CuO催化剂的还原性能,从而提高了CuYO/γ-Al_2O_3催化剂催化分解N_2O的活性.考察了CuYO/γ-Al_2O_3催化剂催化分解N_2O的活性,结果表明,当CuO和Y_2O_3负载量均为12%时,CuYO/γ-Al_2O_3催化剂催化分解N_2O的活性最高,完全分解N_2O温度为488℃.12Cu12YO/γ-Al_2O_3催化剂在有O2条件下,460℃连续反应100 h,活性仍能保持80%左右;还考察了体积分数为9.1%的水蒸气对12Cu12YO/γ-Al_2O_3催化剂活性的影响.A bi-component（ CuO and Y_2O_3） catalyst loaded on γ-Al_2O_3 was prepared by incipientwetness impregnation method and used for the catalytic decomposition of N_2O. Physicochemical properties of the catalyst were analyzed by XRD,BET and SEM. With the addition of Y_2O_3,CuO particles could be highly dispersed over γ-Al_2O_3. H2-TPR analysis indicated that the doping of yttrium oxide significantly promoted the reducibility of CuYO/γ-Al_2O_3,resulting in promoted catalytic activities for the decomposition of N_2O. The CuYO/γ-Al_2O_3 catalyst with equal amounts of Cu and Y oxides（ 12%, respectively） exhibited the highest catalytic activity. The optimum temperature for complete decomposition of N_2O temperature was at 488 ℃. Moreover,the conversion of N_2O could maintain at 80% in a 100 h stability test under 460 ℃ constant reaction temperature.The influence of steam on the activity of the catalyst was also investigated.

关 键 词：N2O CuYO/γ-Al2O3 催化剂 催化分解 活性 

分 类 号：O643.36[理学—物理化学]