ZSM-5小颗粒团聚体的制备及其MTP催化性能研究

Study on Synthesis of Zeolite ZSM-5 Small Particle Aggregates and Their Catalytic Performance for Methanol to Propylene Reaction

以粗孔硅胶与NaAlO_2为源料,TPABr为模板剂,用水热晶化法合成ZSM-5小颗粒团聚体.用XRD、SEM、NH_3-TPD、N_2物理吸附、XRF及TG等方法对其结构进行表征,并考察其甲醇制丙烯(MTP)反应的催化性能.与文献制备的样品相比,制备的ZSM-5小颗粒团聚体含有更丰富的介孔和更好的抗积碳性能,在MTP反应中表现出更好的丙烯选择性和稳定性,其丙烯平均选择性为47.27%,单程寿命达310h.

Taking macroporous silica gel and NaAlO2 as raw materials and TPABr as template,the ZSM-5small particle aggregates were synthesized with hydrothermal crystallization method.The structures were characterized with XRD,SEM,NH3-TPD,N2 physical absorption,XRF,and TG methods.The article also investigates the catalytic performance of their methanol to propylene（MTP）reaction.Comparing with the samples prepared according to the documents,the small particle aggregates of ZSM-5have richer mesoporous and better anti-carbon performance,perform better propylene selectivity and stability in MTP reaction,their average selectivity of propylene is 47.27%,and the conversion per pass turns to 300 h.