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 language | English |
|---|---|
| Pages (from-to) | 57-66 |
| Number of pages | 10 |
| Journal | Applied Catalysis. A, General |
| Volume | 550 |
| DOIs | |
| Publication status | Published - 25 Jan 2018 |
Fingerprint
Keywords
- Anisole
- Deactivation
- Guaiacol
- Hydrodeoxygenation
- NiP/SiO
- Reaction mechanism
Cite this
}
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 journal › Article › Academic › peer-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 -