微波固相法制备Cu/ZSM-5催化剂及其催化性能  

Preparation of Cu/ZSM-5 Catalysts by Dry Reaction under Microwave Irradiation and Their Catalytic Performances

作　　者：阳鹏飞[1,2] 周继承[1] 任文明[1] 

机构地区：[1]南华大学化学化工学院,湖南衡阳421001 [2]湘潭大学化工学院"绿色催化与反应工程"湖南省高校重点实验室,湖南湘潭411105

出　　处：《南华大学学报（自然科学版）》2010年第1期64-69,共6页Journal of University of South China：Science and Technology

摘　　要：采用微波固相法和离子交换法制备了Cu/ZSM-5催化剂,利用XRD、IR、BET和SEM等手段对催化剂样品进行了表征,考察了不同方法制备的改性ZSM-5催化剂上Cu的负载量.结果表明,在相同原料质量比下(M(Cu(AC)2)∶M(HZSM-5)=1∶5),微波固相法制备的催化剂中,Cu的负载量为5.65%;离子交换法制备的催化剂中,Cu的负载量为1.86%,且微波固相法所需时间仅为传统加热条件下离子交换法所需时间的1/39,同时微波辐射能促进了活性组分在分子筛表面及孔道上的分散和固态离子交换反应.NO催化分解反应活性结果表明,微波固相法制备的催化剂具有更高的催化分解活性及稳定性.Cu/ZSM-5 molecular sieve catalysts were prepared by dry reaction under microwave irradiation and ion-exchange.The catalysts were characterized by X-ray diffraction,infrared spectroscopy,BET surface area,scanning electron microscopy.The Cu loading in the catalysts prepared by different method were investigated.The results showed that,under the same mass ratio of raw materials（M（Cu（AC）2）∶ M（HZSM-5）=1∶5）,the Cu loading of w（Cu）=1.86 % over the catalysts can be achieved by the ion-exchange for 780 minutes,and it took only 20 minutes to achieve the Cu loading of w% Cu =5.65 % over the catalysts by dry reaction under microwave irradiation.The reaction time of dry reaction under microwave irradiation is 1/39 of ion-exchange.Moreover,Cu species were dispersed on the surface of ZSM-5 molecular sieve,and a part of them gave rise to solid-state ion exchange with cation of zeolite under microwave irradiation.In addition,the catalytic performance of the catalysts for NO catalytic decomposition was investigated.Compared with the catalysts prepared by ion exchange,the catalysts prepared by dry reaction under microwave irradiation showed higher catalytic activity and stability for NO catalytic decomposition.

关 键 词：Cu/ZSM-5分子筛 一氧化氮 催化分解 微波辐射 固态相互作用 

分 类 号：O643.3[理学—物理化学]