期刊论文详细信息
Journal of the Brazilian Chemical Society
Iridium Catalysts for C-C and C-O Hydrogenolysis: Catalytic Consequences of Iridium Sites
Passos, Fabio B.1  Florez-Rodriguez, Pedro P.1  Pamphile-Adrián, Aracelis J.1  Universidade Federal Fluminense, Niterói, Brazil1 
关键词:  iridium catalysts;    hydrogenolysis;    C-C cleavage;    C-O cleavage;    support effect;   
DOI  :  10.5935/0103-5053.20150354
学科分类:化学(综合)
来源: SciELO
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【 摘 要 】

The support effect on the properties of iridium catalysts for C-C and C-O hydrogenolysis was investigated. Cyclohexane conversion and glycerol hydrogenolysis were used to compare the behavior of iridium catalysts in terms of C-C and C-O cleavage. The nature of the support influenced the catalyst performance in both cyclohexane conversion and glycerol hydrogenolysis. This effect was more evident on the product selectivity. Ir/SiO2 catalyst presented the highest cyclohexane hydrogenolysis activity and the highest selectivity to minor hydrocarbons formed from hexane re-adsorption. For glycerol hydrogenolysis, all catalysts displayed a higher selectivity to products formed by C-O cleavage, mainly 1,2-propanediol (1,2-PDO). Ir/ZrO2 catalyst presented the highest activity in all reaction conditions and the lowest selectivity to minor alcohols produced by C-C cleavage like methanol, ethanol and ethylene glycol. The results were explained in terms of the requirements and the structure of the catalytic sites.

【 授权许可】

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