PAN Ruili1,2, LI Yuping3, TAN Qunjun1, LI Sha1, DOU Tao1
(1. Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, China; 2. Academy of Chemical and Biological Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China; 3. College of Materials Science and Engineering , Taiyuan University of Technology, Taiyuan 030024, China )
Abstract: The mesoporous molecular sieve with the structure of MCM-41 was prepared by recrystallization of FER zeolite in thicker NaOH solution in the presence of cetyl trimethyl ammonium bromide. The mesoporous materials were characterized by X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR), thermogravimetric analysis (DTG), N2 adsorption, temperature programmed desorption of NH3 (NH3-TPD) and hydrothermal treatment methods. Catalytic performances of samples were investigated using catalytic cracking of C4 hydrocarbons to light olefins as probe reaction. The results indicate that the synthesized sample ReFM has ordered hexagonal structure with FER zeolite secondary units in its pore walls. And because of proper pore diameter and acid properties, the synthesized material ReFM obtained 52.29% of light olefins yield at 625 ℃ in catalytic cracking of C4 hydrocarbons reaction.
Key words: FER zeolite; Secondary units; Recrystallization; Mesoporous molecular sieves; C4 hydrocarbons
E-mail: ruilipan@126.com
Journal of Molecular Catalysis, Vol. 25, Issue 5, 2011, 400-405
