Deep Hydrodesulfurization of Gas Oils with High Sulfur Content: Experiment and Kinetic Modeling Full article
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Chemical Engineering Journal
ISSN: 1385-8947 , E-ISSN: 1873-3212 |
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| Output data | Year: 2022, Volume: 446, Number: Part 3, Article number : 137059, Pages count : 11 DOI: 10.1016/j.cej.2022.137059 | ||
| Tags | Hydrotreating; Straight-run gas oils (SRGO); Light coker gas oil (CGO); CoMo/Al2O3 catalyst; Kinetic model | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0014 |
Abstract:
The hydrodesulfurization of straight-run gas oils (SRGO-HS) with high content of sulfur (about 2 wt%) and its mixture with light coker gas oil (CGO) has been studied over CoMo/Al2O3 catalyst using a trickle bed down-flow reactor at the 335-365 degrees C, H-2/HC 300 Nm(3)/m(3), LHSV 0.8-2.5 h(-1) and 3.5-5.1 MPa. The possibility of ultra low sulfur diesel (<10 ppmS) production using feedstocks with sulfur content exceeding 2 wt% was demonstrated under conditions simulating industrial one. To predict the effect of process parameters on the amount of sulfur in products four kinetic models with different insight into the reactivity of individual S-containing compounds were considered. The first model is simplified kinetics based on power law rate equations, taking into account overall sulfur content, the second group includes LHHW type rate equations. The models 3 and 4 take into consideration the difference in the reactivity of sulfur-containing components. Model 3 classifies the total sulfur into two subgroups S-e (easy reactive compounds) and S-r (refractory sulfur compounds dibenzothiophene and its derivatives). In Model 4 the group Sr is divided into three more subgroups. Kinetic rate parameters i.e. frequency factors, apparent activation energies, and adsorption enthalpies, were estimated by fitting the experimental data obtained using the SRGO-HS/CGO feedstock to the models. All kinetic models predicted the experimentally determined conversions of sulfur with a relatively good accuracy (+/- 20%). The kinetic models were verified by comparing the simulation results with the experimental data obtained using the other oil fractions (SRGO-LS) with lower content of sulfur (1.05 wt%). A better agreement was observed between the experiments and prediction by models 3 and 4.
Cite:
Aleksandrov P.V.
, Reshetnikov S.I.
, Bukhtiyarova G.A.
, Noskov A.S.
Deep Hydrodesulfurization of Gas Oils with High Sulfur Content: Experiment and Kinetic Modeling
Chemical Engineering Journal. 2022. V.446. NPart 3. 137059 :1-11. DOI: 10.1016/j.cej.2022.137059 WOS Scopus РИНЦ AN OpenAlex
Deep Hydrodesulfurization of Gas Oils with High Sulfur Content: Experiment and Kinetic Modeling
Chemical Engineering Journal. 2022. V.446. NPart 3. 137059 :1-11. DOI: 10.1016/j.cej.2022.137059 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Nov 23, 2021 |
| Accepted: | May 16, 2022 |
| Published online: | May 18, 2022 |
| Published print: | Oct 15, 2022 |
Identifiers:
| Web of science: | WOS:000810321400007 |
| Scopus: | 2-s2.0-85131100404 |
| Elibrary: | 48718190 |
| Chemical Abstracts: | 2022:1443909 |
| OpenAlex: | W4280614134 |