Synthesis and characterization of composite molecular sieves ZSM-12/MCM-41

摘要

A ZSM-12/MCM-41 composite molecular sieve has been hydrothermally synthesized through a novel process of the self-assem bly of CTAB surfactant micelles with silica-alumina source which has been originated from the alkaline-treated zeolite ZSM-12 and con tains secondary building units characteristic of ZSM-12 besides the zeolite crystals. The structure,morphology and acidity of the composite molecular sieves ZSM-12/MCM-41 samples were thoroughly characterized with XRD,N2 adsorption,TEM and NH3-TPD. The influence of alkaline concentration on the distribution of micropores and mesopores in ZSM-12/MCM-41 composite molecular sieve was investigated.