采用浸渍法制备了一系列不同Cu含量的Cu-ZSM-5催化剂,并用于NH3选择性催化还原(SCR)NO反应.结果表明,当Cu含量为8%时,Cu-ZSM-5催化剂的活性最高;当空速为30 000h-1,在198～440℃反应时NO转化率均高于80%,最高可达97%,且空速的影响较小经快速水热老化后,该催化剂活性明显优于商用V基催化剂.H2O和SO_2对Cu-ZSM-5催化剂的SCR活性有所影响,但可明显恢复.X射线衍射和NH_3程序升温脱附结果表明,当Cu-ZSM-5中Cu含量为8%时,进入ZSM-5中阳离子位的Cu较多,催化剂的活性较高,且其表面具有较多的酸中心和酸量,从而有利于SCR反应.
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