One-Step Preparation of Nano-Hierarchical Pore MOR Zeolites and Its Application in the Conversion of Heavy Aromatic Hydrocarbons
1. School of Chemical Engineering & Technology, Hebei University of Technology, Tianjin 300130, China;
2. Daqing Chemical Research Center, PetroChina Petrochemical Research Institute, Daqing 163714, China
Abstract Basedon the preparation of nano-MOR zeolites firstly, nano-hierarchical pore MOR zeolites were obtained by the one-step hydrothermal crystallization method with cetyl trimethyl ammonium bromide (CTAB) as a mesoporous template. The effects of the preparation conditions on the particle size and pore structure of the MOR zeolites were examined, and the catalytic performance of Pt/MOR zeolite catalysts for cumene hydrodealkylation was also examined. The results showed that the MOR zeolites with particle size of about 30.0 nm were obtained under the conditions of crystallization temperature 130 ℃, crystallization time 48 h, molar ratio of H2O to Si 18, molar ratio of NaOH to Si 0.36 and rotating speed 20 r/min, and the nano-hierarchical pore MOR zeolites were obtained by introducing suitable amount of CTAB into the synthesis system. Compared with the nano-MOR zeolites, the latter possessed higher mesoporous area, higher mesoporous volume, suitable acid amount and acid strength. The Pt catalyst supported on the nano-hierarchical pore MOR zeolites exhibited excellent hydrodealkylation performance due to the increasing of mesoporous volume and the decreasing of molecular diffusion resistance.
Ma Wenhui1,Zhang Tiezhen2,Yang Kun1 et al. One-Step Preparation of Nano-Hierarchical Pore MOR Zeolites and Its Application in the Conversion of Heavy Aromatic Hydrocarbons[J]. 化学反应工程与工艺, 2015, 31(4): 367-372.
Ma Wenhui1,Zhang Tiezhen2,Yang Kun1 et al. One-Step Preparation of Nano-Hierarchical Pore MOR Zeolites and Its Application in the Conversion of Heavy Aromatic Hydrocarbons[J]. 化学反应工程与工艺, 2015, 31(4): 367-372.
