Role of the metal-support interface in the hydrodeoxygenation reaction of phenol
Journal Article
·
· Applied Catalysis B: Environmental
- National Inst. of Technology, Rio de Janeiro (Brazil). Catalysis Division; Military Inst. of Engineering, Rio de Janeiro, (Brazil). Chemical Engineering Dept.; National Inst. of Technology, Rio de Janeiro (Brazil)
- National Inst. of Technology, Rio de Janeiro (Brazil). Catalysis Division
- Univ. of Oklahoma, Norman, OK (United States). School of Chemical, Biological and Materials Engineering. Center for Biomass refining
- Univ. of Helsinki (Finland). Dept. of Chemistry
- Univ. of Texas at San Antonio, TX (United States). Dept. of Biomedical Engineering and Chemical Engineering; Univ. of Texas at San Antonio, TX (United States). Dept. of Mechanical Engineering
- Univ. of Oklahoma, Norman, OK (United States). School of Chemical, Biological and Materials Engineering. Center for Biomass refining
- National Inst. of Technology, Rio de Janeiro (Brazil). Catalysis Division; Military Inst. of Engineering, Rio de Janeiro, (Brazil). Chemical Engineering Dept.
In this paper, the effect of interfacial sites between Pd particles and Nb2O5 species is investigated by testing a series of Pd-Nb2O5/SiO2 catalysts with different niobium loadings for the HDO reaction of phenol in the gas phase. Important differences in the selectivity to deoxygenated product were observed depending on the presence of niobium oxide close to Pd particles, which reveals the key role of the type of active phase in the control of reaction steps. It was found that Pd/SiO2 catalyst promotes hydrogenation pathways, producing cyclohexanone as the major product. For Pd-Nb2O5/SiO2 catalyst containing a Nb/Pd molar ratio of 0.5, a sharp increase in the selectivity to benzene is observed (7.5-fold). Increasing the Nb/Pd molar ratio, the formation of benzene is enhanced. The results showed that the Pd-Nb2O5 interface, composed by an oxophilic oxide in the perimeter of the metal particle, is responsible for the activation of the Csingle bondO bond, promoting the deoxygenation reaction.
- Research Organization:
- University of Oklahoma, Norman, OK (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- FG36-08GO88064
- OSTI ID:
- 1850247
- Alternate ID(s):
- OSTI ID: 1778301
- Journal Information:
- Applied Catalysis B: Environmental, Journal Name: Applied Catalysis B: Environmental Journal Issue: C Vol. 277; ISSN 0926-3373
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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