堇青石载体预处理对蜂窝状催化剂的影响  

EFFECT OF CORDIERITE CARRIER PRETREATMENT ON HONEYCOMB CATALYST

作　　者：赵金双[1] 娄晓荣[1] 王婧[1] 刘鹏飞[1] 何凯[1] 李哲[1] 

机构地区：[1]太原理工大学化学化工学院,太原硕士生030024

出　　处：《煤炭转化》2014年第1期92-96,共5页Coal Conversion

基　　金：国家自然科学基金资助项目(21073131)

摘　　要：使用不同酸、碱溶液对堇青石蜂窝陶瓷载体进行了预处理,考察了载体酸、碱预处理对蜂窝状Fe-Mo/ZSM-5催化剂涂覆率及NO_x催化还原性能的影响,并采用XRD,NH_3-TPD和扫描电镜等技术对蜂窝状催化剂表面形貌、结构特征和表面酸性进行了分析.结果表明,载体经酸性和碱性溶液预处理后,蜂窝状催化剂的涂覆率和催化能力都提高,且酸溶液预处理的效果要优于碱溶液预处理.分析认为,这与酸溶液作用下堇青石结构受到一定程度的破坏,表面变得粗糙以及所制备的蜂窝状催化剂表面较多的弱酸位有关.In this paper,cordierite honeycomb carriers were pretreated by different acid and alkaline solutions to prepare Fe-Mo/ZSM-5 monolithic catalysts.The effect of pretreatment method on the coating rate and performance of the monolithic catalyst was studied.Meanwhile,the surface character,structure and surface acidity of the monolithic catalyst were analyzed by XRD,NH3-TPD and SEM techniques.Results showed that acid and alkaline pretreatment can both increase the coating rate and the catalytic performance of the monolithic catalyst,and the catalyst pretreated by HC1 performed best.It is believed that this result can be contributed to the effect of acid solution,which can modify the cordierite surface and change the surface acidity of monolithic catalyst.

关 键 词：堇青石蜂窝陶瓷 载体预处理 蜂窝状催化剂 NOx 催化还原 

分 类 号：TB383[一般工业技术—材料科学与工程] TQ426.65[化学工程]