Jia M.-J.,Taiyuan University of Technologe |
Li X.-F.,Taiyuan University of Technologe |
Pan R.-L.,Taiyuan University of Science and Technology |
Zhang Y.-T.,Taiyuan University of Technologe |
And 3 more authors.
Journal of Molecular Catalysis | Year: 2014
A new approach was first developed to synthesize Al-ITQ-13 zeolite in a short time via adding promoter in the initial gels. The samples were characterized by XRD, SEM, N2 adsorption, FTIR, and 27Al NMR methods. The kinetic parameters were obtained and the crystallization mechanism was discussed by the way of studying the changes of relative crystallity in the crystallization. It is showed that the physical properties of ITQ-13 synthesized by rapid synthesis method is similar to that synthesized by the traditional synthesis method. And ITQ-13 synthesized by rapid synthesis method contains more Al. The hydrophobic hydration spheres formed around silicate units was polarized by the promoter in the gel. And then the overlapping of SiOSi was facilitated. The ITQ-13 zeolite nucleation activation energy and growth activation energy was reduced so that the rate of crystallization was improved and the time of crystallization was shortened to 11 h. Source