蜂窝状Fe-Mo/ZSM-5催化剂制备及其对NOx催化还原性能的影响

以具有较低热膨胀系数和较好抗热冲击性的堇青石蜂窝状陶瓷为载体、Fe-Mo/ZSM-5为活性组分制备了蜂窝状催化剂，研究了表面活性剂、载体和涂覆方法等条件对蜂窝状催化剂性能及其催化活性的影响。采用XRD、FT-IR、BET和SEM等技术对蜂窝状催化剂的体相结构、表面离子形态等进行了表征和研究。结果表明，以羧甲基纤维素为表面活性剂、美国康宁公司的堇青石蜂窝状陶瓷为载体和超声波法涂覆的蜂窝状催化剂具有最佳的催化活性，300 ℃时NOx催化转化率达100%，且随着温度的升高保持不变。

Preparation of Fe-Mo/ZSM-5 honeycomb catalyst and its performance for catalytic reduction of NOx

A series of monolithic catalysts supported with Fe-Mo/ZSM-5 and based on cordierite honey- comb ceramic substrate were prepared and tested for selective catalytic reduction of NOx with NH3. The effects of surface active agent, substrate and coating methods on the SCR activity of monolithic catalysts were investigated simultaneously. The bulk structures and the surface ionic forms of these catalysts were also characterized by XRD, FT-IR, BET and SEM technologies. The results indicated that the monolithic catalyst,prepared with carboxymethyl cellulose as the surface active agent and Coming eordierite honey- comb ceramics as the substrate by ultrasonic method, exhibited the best catalytic activity, and NOx conver- sion rate over the catalyst reached 100% at 300℃.