On the synthesis of CoAPO-46, -11 and -44 molecular sieves from a Co(Ac)2•4H2O•Al(iPrO)3•H3PO4•Pr2NH•H2O gel via experimental design

被引：23
作者：
Gao, QM [1 ]
Weckhuysen, BM [1 ]
Schoonheydt, RA [1 ]
机构：
[1] Katholieke Univ Leuven, Dept Interfasechem, Ctr Oppervlaktech Katalyse, B-3001 Heverlee, Belgium
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 1999年 / 27卷 / 01期
关键词：
cobalt-substituted microporous alumino-phosphates; crystallinity; hydrothermal synthesis;
D O I：
10.1016/S1387-1811(98)00274-1
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The hydrothermal synthesis of cobalt-substituted microporous alumino-phosphates from an r[Pr2NH] . [CoxAl1-xP1]O-4 . y[H2O] gel is described. A well-defined set of experiments, based on an experimental design, was carried out in order to rationalize the influence of the crystallization time/temperature, and r, x and y of the initial gel on the isomorphous substitution of Co2+ . CoAPO-11, CoAPO-44, CoAPO-46 were the main crystalline materials obtained. These solids were characterized by X-ray diffraction (XRD), thermogravimetrical analysis (TGA), scanning electron microscopy (SEM), electron microscope microprobe analysis (EMMA) and diffuse reflectance spectra (DRS), which resulted in a quantitative model relating the synthesis conditions with the overall crystallinity. In addition, a relation between the overall crystallinity and the degree of isomorphous substitution has been established. (C) 1999 Elsevier Science B.V. All rights reserved.
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页码：75 / 86
页数：12
相关论文
共 30 条
[1]  
[Anonymous], 1986, PRACTICAL EXPT DESIG
[2]   ON THE FORMATION OF COAPSO-44 [J].
BATISTA, J ;
KAUCIC, V ;
RAJIC, N ;
STOJAKOVIC, D .
ZEOLITES, 1992, 12 (08) :925-928
[3]  
BENNET JM, 1989, STUDIES SURFACE SCI, V37, P269
[4]  
Box P, 1978, STAT EXPT
[5]  
Box P., 1987, EMPIRICAL MODEL BUIL
[6]   Synthesis and characterization of CoAPO(4)-39 molecular sieves [J].
Canesson, L ;
Tuel, A .
ZEOLITES, 1997, 18 (04) :260-268
[7]   Hydrothermal syntheses and structural characterization of zeolite analogue compounds based on cobalt phosphate [J].
Feng, PY ;
Bu, XH ;
Stucky, GD .
NATURE, 1997, 388 (6644) :735-741
[8]   The synthesis of high cobalt-containing CoAPO-34 [J].
Hill, SJ ;
Williams, CD ;
Duke, CVA .
ZEOLITES, 1996, 17 (03) :291-296
[9]   SYNTHESIS OF SAPO-11 AND ALPO(4)-11 MOLECULAR-SIEVES IN THE PRESENCE OF CU(II) [J].
LEE, CW ;
BROUET, G ;
CHEN, XH ;
KEVAN, L .
ZEOLITES, 1993, 13 (07) :565-571
[10]   LIQUID-PHASE OXIDATION OF CYCLOHEXANE USING COAPO-5 AS THE CATALYST [J].
LIN, SS ;
WENG, HS .
APPLIED CATALYSIS A-GENERAL, 1993, 105 (02) :289-308
123