Synthesis and properties of micro/meso molecular sieve composite DY/MCM-48
Molecular sieve composite DY/MCM-48 with the DY zeolite crystal core and mesoporous shell has been successfully synthesized by overgrowing MCM-48 on DY zeolite in the system of mixed surfactants of CTAB and OP-10 in alkaline media. The sample was characterized by XRD, N2 adsorption, SEM and pyridine adsorbed IR. The XRD result shows DY/MCM-48 composite has a well ordered mesoporous MCM-48 phase and a zeolite DY phase. The SEM exhibits that the zeolite DY is covered by small sphere-like particles of MCM-48. The result of N2 adsorption indicates that the composite contains a bimodal mesopore system as well as the microporous structure of DY zeolite. The DY /MCM-48 molecular sieve composite characterized by the pyridine adsorbed IR and catalytic cracking reaction of n-heptane exhibits strong acidity and high catalytic activity. All results were quite different from the mechanical mixture of DY and MCM-48.
Yi Wang Linsen Dai Zhiyuan Xue Quanzhi Li
Center of Analysis and Measurement, Fudan University, Shanghai 200433 Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,
国际会议
北京
英文
2007-08-12（万方平台首次上网日期，不代表论文的发表时间）