Title

Enhanced hydroconversion of lignin-derived oxygen-containing compounds over bulk nickel catalysts though Nb2O5 modification

Document Type

Journal Article

Publication Date

2017

Keywords

Nb2O5, Bulk nickel catalysts, Synergistic effect, Hydroconversion, Anisole

DOI

10.1007/s10562-017-2085-6

Abstract

A series of bimetallic Nb–Ni oxide catalysts with different Nb/Ni molar ratio have been prepared by chemical precipitation method. XRD, Raman and XPS results indicate that amorphous Nb2O5species exist in the samples with a Nb/Ni ratio about 0.087. The as-synthesized bimetallic Nb–Ni oxides effectively promote the dispersion of NiO active components, as a result effectively inhibit the agglomeration of NiO particles. Ni0.92Nb0.08O sample with the largest surface area of 173 m2/g mainly consists of fold-like nanosheets and the amorphous Nb2O5 species are well-dispersed all over the bulk NiO. After the reduction in hydrogen, the Nb-promoted bulk nickel catalysts display better catalytic performance for hydrodeoxygenation of lignin-derived anisole to biofuels than bulk Ni catalyst. The selectivity to deoxygenated products with using Ni0.92Nb0.08catalyst increases 2.5 fold to that with bulk Ni catalyst at 160 °C and 3 MPa H2, as a result of the synergistic effect between amorphous Nb2O5 species and metal Ni active sites. In addition, with further increase in the reaction temperature to 200 °C, deoxygenation almost goes quantitatively.

Source Publication

Enhanced Hydroconversion of Lignin-Derived Oxygen-Containing Compounds Over Bulk Nickel Catalysts Though Nb2O5 Modification

Volume Number

147

Issue Number

8

ISSN

1572879X

First Page

2215

Last Page

2224

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