【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,NH₃-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.更多还原

【Abstract】 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 HCl 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.更多还原