Determination of the Hydrogen-Donating Ability of Industrial Distillate Narrow Fractions

Shen, Qiang; Wang, Gang; Duan, Mengchao; Ren, Ailin; Yao, Libo; Hu, Miao; Gao, Jinsen

doi:10.1021/acs.energyfuels.6b02288

Cited by 13 publications

(5 citation statements)

References 25 publications

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“…Sample preparation and the equipment parameters can be found elsewhere . The analysis of the hydrocarbon types was carried out on MS (Agilent 5973 MS) according to ASTM D2786-91 and D3239-91 methods . ICGO and HICGO samples were introduced without any extraction.…”

Section: Methodsmentioning

confidence: 99%

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Combined Hydrotreating and Fluid Catalytic Cracking Processing for the Conversion of Inferior Coker Gas Oil: Effect on Nitrogen Compounds and Condensed Aromatics

Shen¹,

Wang²,

Liu³

et al. 2018

Energy Fuels

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Inferior coker gas oil (ICGO) derived from Venezuelan vacuum residue delayed coking is difficult to process using fluid catalytic cracking (FCC) or hydrocracking (HDC). The high content of nitrogen and condensed aromatics leads to major coking and readily deactivates the acid catalyst. In this work, a sequence of hydrotreating (HDT) and FCC processing is used to effectively convert ICGO to a high-value light oil product. The results show a higher overall conversion and a significant increase in the yield of gasoline compared to FCC processing. Molecular level characterization of the nitrogen compounds and condensed aromatics before and after HDT confirms that the nitrogen content and the 2+-ring aromatic content decreased, whereas the single-ring aromatics increased. The nitrogen compounds were mainly N1, N1O1, N1O2, and N1S1 class species in basic nitrogen and N1, N1O1, N1O2, N2, and N2O1 class species in non-basic nitrogen. Moreover, the double bond equivalent of these species shifted to lower values. The decrease in the nitrogen compounds with a high heteroatom content reduces coking on the FCC catalyst. Subsequently, FCC unit performance and conversion to light oil increased. Moreover, the decrease in the size of N1 class compounds and the ease of their cracking following HDT improved the performance of the FCC unit. Partial saturation of condensed aromatics following HDT also made it easier to crack these compounds.

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Section: Methodsmentioning

confidence: 99%

“…11 The analysis of the hydrocarbon types was carried out on MS (Agilent 5973 MS) according to ASTM D2786-91 and D3239-91 methods. 28 ICGO and HICGO samples were introduced without any extraction. A non-aqueous titration method was used for basic nitrogen analysis according to the UOP269 standard.…”

Section: Methodsmentioning

confidence: 99%

Combined Hydrotreating and Fluid Catalytic Cracking Processing for the Conversion of Inferior Coker Gas Oil: Effect on Nitrogen Compounds and Condensed Aromatics

Shen¹,

Wang²,

Liu³

et al. 2018

Energy Fuels

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“…Four fractionations with varying distillation cutting depths were performed for varying petroleum residues and corresponding vacuum distillate samples following the standardized procedure. 21 Structural parameters (aromaticity, naphthenicity, and aliphaticity) are calculated via the Brown−Ladner method, which is based on 1 H NMR data.…”

Section: Methodsmentioning

confidence: 99%

“…Selected properties are presented in Table . Four fractionations with varying distillation cutting depths were performed for varying petroleum residues and corresponding vacuum distillate samples following the standardized procedure …”

Section: Methodsmentioning

confidence: 99%

Characterization of Petroleum Residues with Varying Cutting Depth and Corresponding Vacuum Distillates Derived from Laboratory Deep-Vacuum Fractionation of Unconventional Heavy Oil for an Instructive Utilization Guideline

et al. 2017

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Petroleum residues with varying cutting depth and corresponding vacuum distillates have been prepared from laboratory deep-vacuum fractionation using unconventional heavy oil (UHO) originated from Venezuela first. They are then sequentially characterized by general analysis, process analysis, and pyrolysis analysis with thermogravimetric analysis (TGA), derivative thermogravimetric analysis (DTG), and differential scanning calorimetry (DSC). Results indicate that a greater increase in distillates recovery would be expected in the case of UHO than that of other referenced crudes under the same cut temperature and stand a good chance to make refineries involved with UHO get comfort by partially offsetting the shortage of light distillates. From the view of structural composition characteristics, cuts, even the ones with high cut temperature, have a high chance of cracking into compounds with lower molecular weight during conversion. Notably, in the case of +565 °C petroleum residue (R5), except for the endothermic effect, an exothermic effect is also shown in the DSC profile, which means that the thermodynamic characteristics of petroleum residues would change from endothermic to exothermic as the thermal process exceeds some conversion point, at which coke yield is 45.8 wt % in the study.

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“…Some examples are light synthetic oils and gas oils; their narrow fractions; technological solvents and byproducts, such as furfural, a slurry and a decant oil (FCCS and FCCDO), a heavy cycle oil (HCO) produced by fluid catalytic cracking, etc. ; these are all studied as industrial H-donors. − However, such H-donor additives are complex mixtures of chemical compounds, depending on their origin, and therefore it is essential to identify candidates with optimal characteristics. The hydrogen-donating ability index is used to find their potential.…”

Section: Introductionmentioning

confidence: 99%

Application of Ethylene Tar as an Additive in Visbreaking of Petroleum Vacuum Residue

et al. 2021

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The byproduct of ethylene tar has a high content of mono-, bi-, and polycyclic aromatic compounds, as well as cycloalkenes, including aromatic cycloalkenes. This paper evaluates the prospects of using ethylene tar as an additive in the visbreaking process of vacuum residue. A series of experiments on visbreaking of vacuum residue with additives of various refinery streams and ethylene tar were performed in a laboratory flow reactor. As a result of a comparative study of the composition of vacuum residue visbreaking products by different methods, it was shown that the use of ethylene tar compared with kerosene, light cycle oil, and heavy cycle oil allows an increased yield of the target product with a higher proportion of aromatic hydrocarbons. A comparative analysis of the characteristics of asphaltenes and resins of visbreaking products indicates a general trend of changes in the process of visbreaking vacuum residue with refinery streams and ethylene tar. A comparison of the colloidal instability index showed that the use of ethylene tar allows attainment of a more stable visbreaking product concerning refinery streams as additives.

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Determination of the Hydrogen-Donating Ability of Industrial Distillate Narrow Fractions

Cited by 13 publications

References 25 publications

Combined Hydrotreating and Fluid Catalytic Cracking Processing for the Conversion of Inferior Coker Gas Oil: Effect on Nitrogen Compounds and Condensed Aromatics

Combined Hydrotreating and Fluid Catalytic Cracking Processing for the Conversion of Inferior Coker Gas Oil: Effect on Nitrogen Compounds and Condensed Aromatics

Characterization of Petroleum Residues with Varying Cutting Depth and Corresponding Vacuum Distillates Derived from Laboratory Deep-Vacuum Fractionation of Unconventional Heavy Oil for an Instructive Utilization Guideline

Application of Ethylene Tar as an Additive in Visbreaking of Petroleum Vacuum Residue

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