Deoxygenation of Esters over Sulfur-Free Ni–W/Al2O3 Catalysts for Production of Biofuel Components
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Chemical Engineering Journal
ISSN: 1385-8947
, E-ISSN: 1873-3212
|
| Output data |
Year: 2020,
Volume: 396,
Article number
: 125202,
Pages count
: 8
DOI:
10.1016/j.cej.2020.125202
|
| Tags |
Deoxygenation; Green diesel; Nickel; Tungsten; Vegetable oil |
| Authors |
Kukushkin R.G.
1,2
,
Yeletsky P.M.
1
,
Grassin C.T.
3
,
Chen B.-H.
4
,
Bulavchenko O.A.
1,2
,
Saraev A.A.
1,2
,
Yakovlev V.A.
1,2
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS
|
| 2 |
Novosibirsk State University
|
| 3 |
National Graduate School of Engineering Chemistry of Lille
|
| 4 |
National Cheng Kung University
|
|
Funding (1)
|
1
|
Russian Science Foundation
|
18-43-08002
|
Sulfur-free Ni–W/Al2O3 catalysts synthesized through incipient wetness impregnation technique were investigated in deoxygenation of methyl palmitate and ethyl caprate blend at 300 °C and P = 1 MPa (PH2 = 0.25 MPa) in a fixed-bed continuous flow reactor. Modification of Ni/Al2O3 catalysts by W (0.4–4.4 wt%) was found to give rise to higher both conversions of the feedstock and deoxygenation degree. In addition, this also resulted in a change in the selectivity of deoxygenation towards alkanes formed via direct hydrodeoxygenation route, compared to alkanes formed through decarboxylation/decarbonylation. Selectivity by alkanes with carbon chain length equal to those of an initial fatty acid formed via hydrodeoxygenation was found to increase with W content increasing. The synthesized catalysts were investigated by XRD, XPS, TEM, BET and H2-TPR techniques. According to XPS study of the reduced samples, tungsten was in 6+ oxidation state on the sample surface and W6+ content increased in the near-surface layer of samples with tungsten content increasing in catalysts.