ZrO_2/Ti-MCM-41催化聚丙烯裂解反应的研究  

Catalytic pyrolysis of polypropylene catalyzed by ZrO_2/Ti-MCM-41

作　　者：谢芳菲[1] 胡智华[2] 刘福胜[1] 解从霞[3] 于世涛[1] 葛晓萍[1] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042 [2]青岛科技大学自动化与电子工程学院,山东青岛266042 [3]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《工业催化》2007年第5期44-47,共4页Industrial Catalysis

基　　金：国家自然科学基金项目(20376035);山东省自然科学基金资助项目(Y2002B04)

摘　　要：采用水热合成法制备了中孔分子筛ZrO2/Ti-MCM-41,通过XRD和N2吸附-脱附对其进行表征。结果表明,该分子筛具有中孔结构,并且随着ZrO2含量的增加,ZrO2/Ti-MCM-41孔道的长程有序性和结晶度有所减弱,直至失去中孔结构。将其应用于聚丙烯(PP)催化裂解反应,通过考察负载量、反应温度、催化剂用量和反应时间,对ZrO2/Ti-MCM-41催化裂解PP反应的规律进行了研究。结果表明,负载ZrO2质量分数为18%的ZrO2/Ti-MCM-41,在反应温度400℃、m(ZrO2/Ti-MCM-41)∶m(PP)=0.02和反应时间30 min条件下,PP转化率可达91.2%,液体产物收率为83.6%,优于热裂解及传统的HZSM-5小孔分子筛催化剂的催化裂解结果。Mesoporous ZrO2/Ti-MCM-41 zeolites were synthesized by hydrothermal method and characterized by XRD and N2 adsorption-desorption. The results showed that the zeolites were of mesoporous structure. Long-range order and crystallinity of the ZrOE/Ti-MCM-41 declined with ZrO2 content, until the mesoporous structure disappeared. ZrOE/Ti-MCM-41 was used as the catalyst for pyrolysis of polypro-pylene（PP）. Influence of ZrO2 content, reaction temperature, dosage of the catalyst and reaction time was investigated. PP conversion of 91.2% and liquid yield of 83.6% were obtained under the optimum condition as follows ： w （ ZrO2 ） = 18%, reaction temperature 400℃, m （catalyst） ： m （PP） = 0.02, reaction time 0.5 h, which was superior to that of thermal pyrolysis and conventional HZSM-5 catalysts.

关 键 词：中孔分子筛 ZrO2/Ti-MCM-41 催化裂解 聚丙烯 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] X705[环境科学与工程—环境工程]