Co‐Processing of Rapeseed Oil — Straight Run Gas Oil Mixture: Comparative Study of Sulfide CoMo/Al2O3-SAPO-11 and NiMo/Al2O3-SAPO-11 Catalysts
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
In Press,
Source type:
Original
|
| Journal |
Catalysis Today
ISSN: 0920-5861
, E-ISSN: 1873-4308
|
| Output data |
Year: 2020,
DOI:
10.1016/j.cattod.2020.11.017
|
| Tags |
Co-processing; SAPO-11; Rapeseed oil; Sulfide catalysts; Cloud point; Hydrodeoxygenation |
| Authors |
Vlasova E.N.
1
,
Porsin A.A.
1
,
Aleksandrov P.V.
1
,
Nuzhdin A.L.
1
,
Bukhtiyarova G.A.
1
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS, 630090, Pr. Lavrentieva 5, Novosibirsk, Russia
|
|
Funding (1)
|
1
|
Ministry of Science and Higher Education of the Russian Federation
|
ГЗ-2017-2020
|
Co-processing of mixture, containing 30 wt.% of rapeseed oil (RSO) in straight run gas oil (SRGO), was studied over stacked bed sulfide catalytic system containing Mo/Al2O3 as a first layer and CoMo/Al2O3-SAPO-11 or NiMo/Al2O3-SAPO-11 catalyst as the second one. The experiments were performed in a trickle bed reactor at 350−380 °C, 4.0–7.0 MPa, 1.5 h−1 and 1000 Nm3/m3. The hydrodeoxygenation (HDO) of RSO is proceeding over Mo/Al2O3 catalyst mostly through direct HDO route (selectivity > 93 %). The proposed combination of catalysts minimizes the formation of carbon monoxide, that is known as an inhibitor of hydrotreating reactions and can affect the hydroisomerisation/hydrocraking of alkanes over CoMo/Al2O3-SAPO-11 and NiMo/Al2O3-SAPO-11 catalysts. The effects of temperature and pressure on the behavior of Mo/Al2O3-CoMo/Al2O3-SAPO-11 and Mo/Al2O3-NiMo/Al2O3-SAPO-11 systems were studied and the difference in the quality of products were discussed with the emphasis on the cold flow properties. The cloud point of products, obtained in the co-processing of RSO-SRGO mixture over Mo/Al2O3-CoMo/Al2O3-SAP and Mo/Al2O3-NiMo/Al2O3-SAP catalytic systems was decreased to −8 and −13 °C respectively with the temperature increase from 350 to 380 °C. In addition, the hydrogenated products produced over NiMo/Al2O3-SAP were characterized by lower final boiling point values and aromatic content in comparison with that produced over CoMo/Al2O3-SAP catalyst. Unexpectedly, the opposite effect of pressure was observed on the cloud point and the conversion of long chain alkanes, which were produced in hydrodeoxygenation of RSO.