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Co-Hydroprocessing of Straight-Run Gasoil – Rapeseed Oil Mixture over Stacked Bed Mo/Al2O3 + NiMo/Al2O3-SAPO-11 Catalysts Full article

Journal Fuel
ISSN: 0016-2361 , E-ISSN: 1873-7153
Output data Year: 2021, Volume: 285, Article number : 119504, Pages count : 8 DOI: 10.1016/j.fuel.2020.119504
Tags Biofuel; Triglyceride; Hydrodeoxygenation; Co-processing; Sulfide catalyst; SAPO-11
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, Pr. Ak. Lavrentieva 5, Novosibirsk 630090, Russia

Funding (1)

1 Federal Agency for Scientific Organizations 0303-2016-0012 (V.47.1.4.)

Abstract: Co-hydroprocessing of straight-run gasoil (SRGO) – rapeseed oil (RSO) mixture over stacked bed sulfide catalytic system (Mo/Al2O3 + NiMo/Al2O3-SAPO-11) was investigated at temperature 350–380 °C, pressure 4.0–7.0 MPa, H2/feed – 1000 Nm3/m3 and liquid hour space velocity 1.0–1.5 h−1. Mo/Al2O3 catalyst was used in the first layer to provide selective conversion of RSO preferably through “direct hydrodeoxygenation” route, excluding COx formation. The influence of temperature and pressure on the product quality and on the conversion of n-octadecane (n-C18H38) produced in hydrodeoxygenation of RSO were studied. The co-processing of 30%RSO/70%SRGO mixture at 350 °C, 5.0 MPa, 1000 Nm3/m3 and 1.5 h−1 gives the product with the acceptable density, sulfur and aromatics contents, but increased cloud point (-1°C). It was shown that a temperature increase from 350 °C to 380 °C resulted in a decrease of cloud point for 12° due to higher n-C18H38 conversion at 380 °C. On the contrary, a pressure increase from 4.0 to 7.0 MPa led to a decrease of n-C18H38 conversion over sulfide Mo/Al2O3 + NiMo/Al2O3-SAPO-11 catalysts. This observation could be explained by higher concentration of NH3 and H2S, by-products of SRGO hydrotreatment, in liquid phase at higher pressure. To prove this hypothesis the effects of NH3 and H2S were investigated on co-processing of 30 wt% RSO in hydrotreated SRGO. It was found that the presence of NH3 was the main reason of inhibiting effect on hydrocracking/ hydroisomerization reactions in co-processing of RSO-SRGO mixtures.
Cite: Vlasova E.N. , Porsin A.A. , Aleksandrov P.V. , Nuzhdin A.L. , Bukhtiyarova G.A.
Co-Hydroprocessing of Straight-Run Gasoil – Rapeseed Oil Mixture over Stacked Bed Mo/Al2O3 + NiMo/Al2O3-SAPO-11 Catalysts
Fuel. 2021. V.285. 119504 :1-8. DOI: 10.1016/j.fuel.2020.119504 WOS Scopus РИНЦ AN OpenAlex
Dates:
Submitted: Apr 25, 2020
Accepted: Oct 12, 2020
Published online: Oct 22, 2020
Published print: Feb 1, 2021
Identifiers:
Web of science: WOS:000623125400001
Scopus: 2-s2.0-85093952347
Elibrary: 45235318
Chemical Abstracts: 2020:2133865
OpenAlex: W3093971785
Citing:
DB Citing
Scopus 18
Web of science 17
Elibrary 16
OpenAlex 20
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