Synthesis,Characterization and Properties of Nano-sized NaY Zeolite

The nano-sized NaY zeolite was synthesized from metakaolin in the hydrothermal synthesis system by using ultrasonic during aging time.Its structure was characterized by XRD,SEM,TEM,HREM.The physicochemical properties and catalytic characteristics of nano-sized NaY zeolite were studied,and compared with those of the regular NaY zeolite.The results showed that the size of products was about 100 nm,and the relative crystallinity 59.61%,Si/Al mole ratio 5.02,surface area 762 m2/g,mesopore volume 15.33%,structure-destroy temperature 901 ℃.When the crude oil was cracked using nano-sized NaY zeolite as the catalyst,micro-reaction activity (MAT) of the catalyst was 74%,gasoline yield 65.7%,coke yield 2.3%.