期刊
CHINESE JOURNAL OF CATALYSIS
卷 36, 期 11, 页码 1928-1935出版社
SCIENCE PRESS
DOI: 10.1016/S1872-2067(15)60955-X
关键词
Small crystal; TS-1 molecular sieve; Seed-induced synthesis; Ammonia; Catalytic oxidation; Cyclohexanone ammoximation
资金
- National Natural Science Foundation of China [21403070, 21373088]
- Innovation Program of Shanghai Municipal Education Commission [13zz038]
- Key Project of Shanghai Committee of Science and Technology [12JC1403600]
- National Key Technology RD Program [2012BAE05B02]
- Shanghai Leading Academic Discipline Project [B409]
Small-crystal TS-1 was synthesized via a seed-induced approach using ammonia as the alkali source and tetrapropylammonium bromide as an auxiliary structure-directing agent The TS-1 samples were characterized using X-ray diffraction, N-2 adsorption-desorption, Fourier-transform infrared spectroscopy, inductively coupled plasma atomic emission spectroscopy, scanning electron microscopy, and ultraviolet-visible spectroscopy. The use of the colloidal seed reduced the crystal size, and an appropriate amount of silicalite-1 seed assisted Ti incorporation into the TS-1 framework. This method reduces the cost of TS-1 synthesis because a significantly smaller amount of tetrapropylammonium hydroxide is used. The catalytic performance of the synthesized small-crystal TS-1 samples in cyclohexanone ammoximation was better than that of bulk TS-1 as a result of improved diffusion and a larger number of active tetrahedral Ti centers. (C) 2015, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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