Study on Application of β Zeolite in Cracking Catalyst

zeolite was synthesized by using hydrothermal method with silica as silicon source, and its physico chemical properties were investigated by using XRD, FT IR, BET etc . USY zeolite and β zeolite were mixed in different proportions as the active components of the catalyst for catalytic cracking. Comprehensive evaluation and comparison were made about the effect of the content of β zeolite in the catalyst on microactivity test (MAT) activity, coke deposition, composition of the gaseous product and RON of the obtained gasoline etc . The effect of P or RE modified β zeolite on the activity of the catalyst, distribution of the products and RON of the obtained gasoline was investigated under the condition of using modified β zeolite taking the part place of USY zeolite. The result showed that, with the increase of the content of β zeolite in the catalyst, the MAT, the i C = 4 content in the gaseous product and the RON of the obtained gasoline increase, while the deposited coke decreases. When the content of β zeolite in the catalyst reaches to a certain value, the i C = 4 content in the gaseous product increases obviously but the MAT decreases. The modification of β zeolite by P or RE was studied, and the catalyst with Pβ zeolite increases the MAT and decreases the deposited coke, but does not obviously affect the composition of gasoline, as compared with the unmodified β zeolite.