负载型碱处理ZSM-5催化丙烯醛二乙缩醛和氨合成吡啶和3-甲基吡啶研究

The Supported ZSM-5 via Alkaline Treatment for the Catalytic Synthesis of Acrolein Diethyl Acetal and Ammonia toward Pyridine and 3-Picoline

以碱处理ZSM-5(ZSM-5-At)为载体,采用浸渍法负载多种活性组分MF_x(M:Mg或K)和MO_x(M:单一或双元素)制得催化剂MF_x/ZSM-5-At和MO_x/ZSM-5-At,其结构经X-射线衍射(XRD)表征。以丙烯醛二乙缩醛、水和氨合成吡啶和3-甲基吡啶反应为评价活性对象考察了催化剂的活性。研究结果表明,与MgF_2/ZSM-5-At相比,KF/ZSM-5-At表现出更好的催化活性;当KF/ZSM-5-At焙烧温度为700℃和KF负载量为1.0%时,吡啶和3-甲基吡啶总收率为最大值。在系列MO_x/ZSM-5-At催化剂中,ZrO_2/ZSM-5-At上获得的吡啶和3-甲基吡啶总收率为最高。

A series of MFx（M： Mg or K）/ZSM-5-At and MOx（M： single or dual elements）/ZSM-5-At catalysts were prepared by wet impregnation method,and ZSM-5-At was obtained by alkaline treatment. The synthesis of pyridine and 3-picoline from acrolein diethyl acetal,water and ammonia was evaluated. Some catalysts were characterized by XRD. The results showed that KF/ZSM-5-At exhibited better catalytic activity than MgF2/ZSM-5-At. Besides,the total yield of pyridine and 3-picoline achieved the maximum at the calcination temperature of KF/ZSM-5-At at 700 ℃ and the loading of KF was 1. 0 wt%. Among series of MOx/ZSM-5-At catalysts,ZrO2/ZSM-5-At showed the highest total yield of pyridine and 3-picoline.