全结晶ZSM-5分子筛催化剂研究及工业应用

Study of holocrystalline ZSM-5 zeolite catalyst and its commercial application

制备了全结晶ZSM-5分子筛催化剂,采用XRD、SEM、N2物理吸附-脱附及NH3-TPD等对催化剂进行表征,并考察其用于碳四烯烃催化裂解制丙烯(OCC)反应的催化性能。结果表明,制备的全结晶ZSM-5分子筛催化剂比常规成型的催化剂具有更高的结晶度、更大的比表面积、更丰富的孔结构以及更多的活性中心。高空速有利于反应的进行,提高压力对反应不利,升高温度有利于提高产物丙烯收率。在实验室研究的基础上,将全结晶ZSM-5分子筛催化剂用于OCC工业装置,取得良好的应用效果。

The holocrystalline ZSM -5 zeolite catalyst was prepared and its catalytic process of C4 olefins catalytic cracking to propylene was investigated. The holocrystalli performance in the ne ZSM - 5 zeolite catalysts were characterized by XRD, BET, SEM and NH3 - TPD methods. The results showed that the ho- locrystalline ZSM -5 zeolite catalyst had higher crystallinity, larger specific surface area, richer pore struc- tures and more active centers than regular ZSM -5 catalyst. Higher space velocity,lower reaction pressure and higher reaction temperature were good for the reaction of C4 olefins catalytic cracking. Based on the a- bove results,the holocrystalline ZSM -5 zeolite catalyst was applied in the industrial unit of C4 olefins catalytic cracking, and a good application result was obtained.