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Significant Formation of Adipic Acid by Direct Oxidation of Cyclohexane Using Supported Nano-Gold Catalysts.
- Source :
-
ChemCatChem . Sep2012, Vol. 4 Issue 9, p1330-1336. 7p. - Publication Year :
- 2012
-
Abstract
- Adipic acid (AA) is one of the highest volume chemicals in world use with a wide range of commercial applications. This paper demonstrates the possibility of producing significant proportions of AA by the selective oxidation of cyclohexane (CH) in one step using various supported gold-nanoparticle (AuNP) catalysts. The catalysts were characterized by ICP, BET, XRD, X-ray photoelectron microscopy, and TEM. The catalytic activity tests were carried out in the liquid phase using autoclaves in the temperature range of 100-170 °C at 10 bar. A CH conversion of over 25 %, with 26% selectivity of AA and 70% selectivity of KA oil (cyclohexanone+cyclohexanol), was achieved over a nano-gold/TiO2 (anatase) catalyst. The superior performance of this catalyst is attributed to the smaller size of AuNPs, which has an average particle size of 2 nm. Good correlation between activity and Au particle size could be achieved. Overall, the particle size of the AuNPs showed a strong influence on catalytic performance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18673880
- Volume :
- 4
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- ChemCatChem
- Publication Type :
- Academic Journal
- Accession number :
- 79370427
- Full Text :
- https://doi.org/10.1002/cctc.201200008