Hydrodeoxygenation of guaiacol over Ni2P/SiO2–reaction mechanism and catalyst deactivation

Research output: Contribution to journalArticleAcademicpeer-review

20 Citations (Scopus)
1 Downloads (Pure)

Abstract

The catalytic hydrodeoxygenation of guaiacol, a phenolic model compound of biomass lignin pyrolysis products, has been investigated under atmospheric pressure in H2 utilizing a Ni2P/SiO2 catalyst. Reaction networks are proposed based on the product distribution as a function of contact time and the temperature programmed surface reaction of adsorbed guaiacol and anisole. Guaiacol is mainly converted to benzene through demethoxylation and dehydroxylation via phenol and anisole as intermediates. Demethylation of guaiacol is a side-reaction, which produces small amounts of catechol. Spent catalyst samples were characterized by means of XRD, XPS, TEM, and temperature programmed oxidation to gain understanding the observed slight deactivation. Coke deposition, sintering, and the altering properties of Ni and P species on catalyst surface all contribute to deactivation, while there is no indication of surface oxidation after reaction. The increase of Niδ+ or Ni0 on the Ni2P surface and the decrease of Brønsted acid sites (i.e. P–OH) are considered to be the major reasons of product distribution changes.

Original languageEnglish
Pages (from-to)57-66
Number of pages10
JournalApplied Catalysis. A, General
Volume550
DOIs
Publication statusPublished - 25 Jan 2018

Fingerprint

Guaiacol
Catalyst deactivation
Catalysts
Oxidation
Surface reactions
Lignin
Coke
Phenols
Atmospheric pressure
Benzene
Biomass
Pyrolysis
Sintering
X ray photoelectron spectroscopy
Phenol
Transmission electron microscopy
Temperature
Acids
anisole

Keywords

  • Anisole
  • Deactivation
  • Guaiacol
  • Hydrodeoxygenation
  • NiP/SiO
  • Reaction mechanism

Cite this

@article{917b11bdafb9409087fb38abba6c0375,
title = "Hydrodeoxygenation of guaiacol over Ni2P/SiO2–reaction mechanism and catalyst deactivation",
abstract = "The catalytic hydrodeoxygenation of guaiacol, a phenolic model compound of biomass lignin pyrolysis products, has been investigated under atmospheric pressure in H2 utilizing a Ni2P/SiO2 catalyst. Reaction networks are proposed based on the product distribution as a function of contact time and the temperature programmed surface reaction of adsorbed guaiacol and anisole. Guaiacol is mainly converted to benzene through demethoxylation and dehydroxylation via phenol and anisole as intermediates. Demethylation of guaiacol is a side-reaction, which produces small amounts of catechol. Spent catalyst samples were characterized by means of XRD, XPS, TEM, and temperature programmed oxidation to gain understanding the observed slight deactivation. Coke deposition, sintering, and the altering properties of Ni and P species on catalyst surface all contribute to deactivation, while there is no indication of surface oxidation after reaction. The increase of Niδ+ or Ni0 on the Ni2P surface and the decrease of Br{\o}nsted acid sites (i.e. P–OH) are considered to be the major reasons of product distribution changes.",
keywords = "Anisole, Deactivation, Guaiacol, Hydrodeoxygenation, NiP/SiO, Reaction mechanism",
author = "X. Lan and E.J.M. Hensen and T. Weber",
year = "2018",
month = "1",
day = "25",
doi = "10.1016/j.apcata.2017.10.018",
language = "English",
volume = "550",
pages = "57--66",
journal = "Applied Catalysis. A, General",
issn = "0926-860X",
publisher = "Elsevier",

}

Hydrodeoxygenation of guaiacol over Ni2P/SiO2–reaction mechanism and catalyst deactivation. / Lan, X.; Hensen, E.J.M.; Weber, T.

In: Applied Catalysis. A, General, Vol. 550, 25.01.2018, p. 57-66.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Hydrodeoxygenation of guaiacol over Ni2P/SiO2–reaction mechanism and catalyst deactivation

AU - Lan, X.

AU - Hensen, E.J.M.

AU - Weber, T.

PY - 2018/1/25

Y1 - 2018/1/25

N2 - The catalytic hydrodeoxygenation of guaiacol, a phenolic model compound of biomass lignin pyrolysis products, has been investigated under atmospheric pressure in H2 utilizing a Ni2P/SiO2 catalyst. Reaction networks are proposed based on the product distribution as a function of contact time and the temperature programmed surface reaction of adsorbed guaiacol and anisole. Guaiacol is mainly converted to benzene through demethoxylation and dehydroxylation via phenol and anisole as intermediates. Demethylation of guaiacol is a side-reaction, which produces small amounts of catechol. Spent catalyst samples were characterized by means of XRD, XPS, TEM, and temperature programmed oxidation to gain understanding the observed slight deactivation. Coke deposition, sintering, and the altering properties of Ni and P species on catalyst surface all contribute to deactivation, while there is no indication of surface oxidation after reaction. The increase of Niδ+ or Ni0 on the Ni2P surface and the decrease of Brønsted acid sites (i.e. P–OH) are considered to be the major reasons of product distribution changes.

AB - The catalytic hydrodeoxygenation of guaiacol, a phenolic model compound of biomass lignin pyrolysis products, has been investigated under atmospheric pressure in H2 utilizing a Ni2P/SiO2 catalyst. Reaction networks are proposed based on the product distribution as a function of contact time and the temperature programmed surface reaction of adsorbed guaiacol and anisole. Guaiacol is mainly converted to benzene through demethoxylation and dehydroxylation via phenol and anisole as intermediates. Demethylation of guaiacol is a side-reaction, which produces small amounts of catechol. Spent catalyst samples were characterized by means of XRD, XPS, TEM, and temperature programmed oxidation to gain understanding the observed slight deactivation. Coke deposition, sintering, and the altering properties of Ni and P species on catalyst surface all contribute to deactivation, while there is no indication of surface oxidation after reaction. The increase of Niδ+ or Ni0 on the Ni2P surface and the decrease of Brønsted acid sites (i.e. P–OH) are considered to be the major reasons of product distribution changes.

KW - Anisole

KW - Deactivation

KW - Guaiacol

KW - Hydrodeoxygenation

KW - NiP/SiO

KW - Reaction mechanism

UR - http://www.scopus.com/inward/record.url?scp=85032719716&partnerID=8YFLogxK

U2 - 10.1016/j.apcata.2017.10.018

DO - 10.1016/j.apcata.2017.10.018

M3 - Article

AN - SCOPUS:85032719716

VL - 550

SP - 57

EP - 66

JO - Applied Catalysis. A, General

JF - Applied Catalysis. A, General

SN - 0926-860X

ER -