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  Impact of Hydrophobic Organohybrid Silicas on the Stability of Ni2P Catalyst Phase in the Hydrodeoxygenation of Biophenols

Dierks, M., Cao, Z., Manayil, J. C., Akilavasan, J., Wilson, K., Schüth, F., et al. (2018). Impact of Hydrophobic Organohybrid Silicas on the Stability of Ni2P Catalyst Phase in the Hydrodeoxygenation of Biophenols. ChemCatChem, 10(10), 2219-2231. doi:10.1002/cctc.201702001.

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 Creators:
Dierks, Michael1, Author              
Cao, Zhengwen1, Author              
Manayil, Jinesh C.2, Author
Akilavasan, Jeganathan3, Author              
Wilson, Karen4, Author
Schüth, Ferdi1, Author              
Rinaldi, Roberto5, Author
Affiliations:
1Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
2European Bioenergy Research Institute, School of Engineering & Applied Science, Aston University, Birmingham, UK, ou_persistent22              
3Research Group Marlow, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445612              
4School of Science, RMIT University, Melbourne, VIC, Australia, ou_persistent22              
5Department of Chemical Engineering, Imperial College London, London, UK, ou_persistent22              

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Free keywords: catalyst deactivation; hydrodeoxygenation; organosilanes; support surface polarity; tetraethyl orthosilicate
 Abstract: Hydrodeoxygenation (HDO) of lignocellulose‐derived pyrolysis oils offers an option to produce fuel substitutes. However, catalyst deactivation and stability constitute a significant issue. Herein, the dependence of stability and activity of Ni2P/SiO2 HDO catalysts on the support surface polarity is addressed in detail. The support surface polarity was adjusted by copolymerizing tetraethyl orthosilicate (TEOS) with different types and amounts of organosilanes by a sol–gel process in the presence of nickel nitrate and citric acid. After thermal treatment under an inert atmosphere, Ni/SiO2 precursors were formed. They were converted into Ni2P/SiO2 catalysts by using NaH2PO2 as a PH3 source. The catalyst surface polarity was characterized by inverse gas chromatography measurements of the free energy of methanol adsorption, and specific and dispersive surface energies derived from polar and nonpolar probe molecule adsorption. The correlation between catalyst performance and support surface polarity indicates that, to prevent deactivation of the catalyst by water under reaction conditions, the affinity of the support towards polar substances must be decreased below a threshold value.

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Language(s): eng - English
 Dates: 2017-12-172018-01-222018-05-24
 Publication Status: Published online
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/cctc.201702001
 Degree: -

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Title: ChemCatChem
  Other : ChemCatChem
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 10 (10) Sequence Number: - Start / End Page: 2219 - 2231 Identifier: ISSN: 1867-3880
CoNE: https://pure.mpg.de/cone/journals/resource/1867-3880