HDO of Methyl Palmitate over Silica-Supported Ni Phosphides: Insight into Ni/P Effect
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Catalysts
ISSN: 2073-4344
|
| Output data |
Year: 2017,
Volume: 7,
Number: 10,
Article number
: 298,
Pages count
: 20
DOI:
10.3390/catal7100298
|
| Tags |
31P MAS NMR, Acidity, Hydrodeoxygenation, Methyl palmitate, Ni/P ratio, Nickel content, Nickel phosphide, POx groups content |
| Authors |
Deliy Irina V.
1
,
Shamanaev Ivan V.
1
,
Gerasimov Evgeny Yu.
1
,
Pakharukova Vera P.
1
,
Yakovlev Ilya V.
1
,
Lapina Olga B.
1
,
Aleksandrov Pavel V.
1
,
Bukhtiyarova Galina A.
1
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis, Pr. Lavrentieva 5, 630090 Novosibirsk, Russia
|
|
Funding (1)
|
1
|
Federal Agency for Scientific Organizations
|
0303-2016-0012 (V.47.1.4.)
|
Two sets of silica-supported nickel phosphide catalysts with a nickel content of about 2.5 and 10 wt % and Ni/P molar ratio 2/1, 1/1 and 1/2 in each set, were prepared by way of a temperature-programmed reduction method using (Ni(CH3COO)2) and ((NH4)2HPO4) as a precursor. The NixPy/SiO2 catalysts were characterized using chemical analysis N2 physisorption, XRD, TEM, 31P MAS NMR. Methyl palmitate hydrodeoxygenation (HDO) was performed in a trickle-bed reactor at 3 MPa and 290 °C with LHSV ranging from 0.3 to 16 h−1. The Ni/P ratio was found to affect the nickel phosphide phase composition, POx groups content and catalytic properties in methyl palmitate HDO with the TOF increased along with a decline of Ni/P ratio and a growth of POx groups’ content. Taking into account the possible routes of methyl palmitate conversion (metal-catalyzed hydrogenolysis or acid-catalyzed hydrolysis), we proposed that the enhancement of acid POx groups’ content with the Ni/P ratio decrease provides an enhancement of the rate of methyl palmitate conversion through the acceleration of acid-catalyzed hydrolysis.