Allylbenzene isomerisation over as-synthesized MgAl and NiAl containing LDHs: Basicity-activity relationships

被引：26
作者：
Jinesh, C. M. [1 ]
Antonyraj, Churchil A. [1 ]
Kannan, S. [1 ]
机构：
[1] CSIR, Cent Salt & Marine Chem Res Inst, Discipline Inorgan Mat & Catalysis, Bhavnagar 364002, Gujarat, India
来源：
APPLIED CLAY SCIENCE | 2010年 / 48卷 / 1-2期
关键词：
Allylbenzene isomerisation; Basicity; Phenol adsorption; CO2 temperature programmed desorption; LAYERED DOUBLE HYDROXIDE; SOLID BASE CATALYSTS; AL HYDROTALCITES; ALDOL CONDENSATION; MIXED OXIDES; OXIDATION; WATER; DECOMPOSITION; ALUMINUM; EUGENOL;
D O I：
10.1016/j.clay.2009.11.026
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Isomerisation of allylbenzene to beta-methyl styrene (cis + trans) has been successfully carried out over Mg and Ni containing as-synthesized hydrotalcites (HTs). The samples screened by varying the M(II)/Al atomic ratio showed that MgAl4-HT and NiAl4-HT (M(II)/M(III) atomic ratio is around 4.0) exhibited a maximum conversion of 99% and 95% respectively at 160 degrees C using DMF as solvent in 6 h. Studies were done to discern the surface basicity of these samples through CO2 temperature programmed desorption and phenol adsorption. Both measurements gave reasonable correlation with isomerisation activity. This reaction can be studied as a model reaction for assessing basicity of as-synthesized HTs augmenting the earlier results of Aramendia et al. for calcined HTs (Aramendia, 2002, 2004). (C) 2009 Elsevier By. All rights reserved.
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页码：243 / 249
页数：7
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