The effect of rapeseed oil and carbon monoxide on SRGO hydrotreating over sulfide CoMo/Al2O3 and NiMo/Al2O3 catalysts

Власова, Е. Н.; Bukhtiyarova, G. A.; Deliy, Irina V.; Aleksandrov, Pavel V.; Porsin, Aleksander A.; Panafidin, M.A.; Gerasimov, Evgeny Yu.; Bukhtiyarov, Valerii I.

doi:10.1016/j.cattod.2019.06.011

Cited by 20 publications

(6 citation statements)

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“…For most hydrocarbon classes, we can even provide far more details, for example, hydrocarbon class distribution by carbon number. As clamined by several studies, the n -paraffin content of the diesel fraction changed the most during the hydroprocessing of raw vegetable oil or its blends with petroleum streams. − To investigate this claim in more detail, Figure shows the distribution of normal paraffins by carbon number (nC15–nC18) for all diesel samples, presented in two panels, due to the very different concentration range. In general, n -heptadecane and n -octadecane, shown in Figure b, are produced at 10 times higher concentration than n -pentadecane and n -hexadecane (Figure a), especially in diesel samples obtained from canola oil/HVGO blends.…”

Section: Resultsmentioning

confidence: 99%

“…The co-hydroprocessing of different vegetable oils with petroleum feedstocks has been studied by a number of research groups. − Most of the published studies have focused on the hydroprocessing performance (such as conversions of hydrodesulfurization (HDS), hydrodenitrogenation (HDN), hydrodeoxygenation (HDO), catalyst deactivation and stability, etc.) rather than on a detailed analysis and characterization of the derived products from co-processing petroleum and biomass feedstocks.…”

Section: Introductionmentioning

confidence: 99%

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Detailed Characterization of Diesel Fractions from Co-Hydroprocessing Vegetable Oil and Petroleum Heavy Vacuum Gas Oil Blends

2021

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In this study, 20 diesel fractions were obtained by co-hydroprocessing blends of low-grade canola oil and Canadian oil sand bitumen-derived heavy vacuum gas oil (HVGO) at different canola oil/HVGO blending ratios, reaction temperatures and pressures, and liquid hourly space velocities. A commercial hydroprocessing catalyst was used in the experiments under typical commercial operating conditions. The obtained diesel fractions were fully characterized by using standard ASTM methods and advanced two-dimensional gas chromatography. Characterization results of the diesel fractions showed that, with the increased canola oil content in the feed blends, the contents of aromatics and cycloparaffins decreased and the content of isoparaffins remained relatively constant. In contrast, the content of normal paraffins (n-paraffins) increased. The observed increase in the n-paraffins in the diesel fractions was attributed to the hydrodeoxygenation and hydrodecarboxylation of triglycerides in the canola oil. The n-paraffins in the diesel were mostly n-heptadecane (product of hydrodecarboxylation) and n-octadecane (product of hydrodeoxygenation) with traces of other lighter or heavier n-paraffins. The formation of n-heptadecane and n-octadecane resulted in improved physical and combustion properties of the diesel fractions, such as density, boiling point distribution, and cetane index/number.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detailed Characterization of Diesel Fractions from Co-Hydroprocessing Vegetable Oil and Petroleum Heavy Vacuum Gas Oil Blends

2021

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“…Several metal-based catalysts have been proposed for these reactions: from transition to noble metal catalysts . These catalysts show high activity for the removal of heteroatoms in hydrodesulfurization, hydrodenitrogenation, and hydrodeoxygenation processes. , Catalysts commonly used in industrial hydrotreating units are transition metal sulfides (Mo or W) promoted by Ni or Co onto alumina …”

Section: Introductionmentioning

confidence: 99%

Production of Biofuels from Hydrodeoxygenation and Hydroisomerization of Triglycerides with Metal-Supported SAPO-11 Molecular Sieves

Torres-Bujalance,

Prieto,

Rodriguez Espinoza

et al. 2024

Energy Fuels

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Hydroprocessing of fats and oils is being implemented as the main alternative to fossil fuels. Industrial-scale routes are based on a complex sequence of reactors and unit operations of separation: hydrodeoxygenation, fractionation, downstream hydrocracking/hydroisomerization, and final purification. In the present work, one-step conversion of triglycerides using nonsulfided metalloaded silicoaluminophosphates-11 (SAPO-11) molecular sieves is proposed to convert triglyceride feedstocks to isomerized renewable hydrocarbons. Different noble (Pd, Pt) and transition (Ni, Cu) metals were impregnated onto a SAPO-11 molecular sieve. The resulting bifunctional catalysts were characterized by ICP-OES, adsorption−desorption N 2 at −196 °C, n-propylamine temperature-programmed desorption, X-ray fluorescence spectroscopy, SEM, and TEM. The catalytic behavior was tested in a stirred tank reactor device, using refined vegetable oil as reference triglyceride. The operation conditions were set at 50 bar, 350 °C under 800 rpm stirring. The effect of the different metals on the catalytic performance was evaluated in terms of conversion of triglycerides, yield to hydrocarbons (naphtha, kerosene, diesel, and heavy fractions), and isomerization activity. The highest yield to liquid hydrocarbons of 73.1% was obtained for a nickel-based SAPO-11 with an 8% metal loading. Among the different metals evaluated (Pt, Pd, Ni, Cu), nickel showed the highest isomerization activity with the highest iso/n-paraffins ratio of 0.92. In all cases, a fraction of heavy hydrocarbon was obtained, suggesting that long residence time led to undesired side reactions.

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“…21 Nowadays, in order to hydropurify various crude oil fractions, cobalt/molybdate (Co Mo) and nickel/molybdate (Ni Mo) supported on different substrates are the most commonly used catalysts. [22][23][24][25][26][27] The characterizing properties and performance of catalysts are influenced by the synthesis techniques, supports type, and the nature of active components. Therefore, for any catalytic process, while selecting the optimal operating conditions, the selection of the optimal catalyst is also very important.…”

Section: Introductionmentioning

confidence: 99%

“…Investigation of these parameters for HDS process facilitates the achievement of optimal conditions 21 . Nowadays, in order to hydropurify various crude oil fractions, cobalt/molybdate (CoMo) and nickel/molybdate (NiMo) supported on different substrates are the most commonly used catalysts 22‐27 . The characterizing properties and performance of catalysts are influenced by the synthesis techniques, supports type, and the nature of active components.…”

Section: Introductionmentioning

confidence: 99%

Performance study of Ni, Co, and Mo catalysts supported on γ ‐Al ₂ O ₃ and HZSM5 in HDS reactions of mixed naphtha

Boroujeni

Irankhah

2021

Intl J of Energy Research

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catalysts were synthesized by the wetness impregnation technique. Field emission scanning electron microscopy, X-ray diffraction, and nitrogen physisorption methods were used for characterizing the prepared catalysts. The activity of the synthesized catalysts was studied by passing the mixed naphtha and H 2 over a fixed bed reactor with sulfiding process prior to HDS reactions at ambient pressure, 285 C, LHSV of 5.8 h À1 , and H 2 /HC volumetric ratio of 94. Ni, Co, and Mo with mass percent of 3.5 wt% were loaded on laboratorysynthesized γ-Al 2 O 3 and purchased HZSM5 supports. For promoted Ni Mo/ γ-Al 2 O 3 catalyst, 3.5 wt% Ni and 17 wt% Mo were impregnated on laboratory synthesized γ-alumina support, similar to the commercial industrial catalyst. Ultimately, the HDS reactions over the synthesized Ni Mo/γ-Al 2 O 3 decreased the total sulfur content of mixed naphtha from 430 to 25 ppm wt, as a synthesized catalyst with the best reactor performance and acceptable long-term stability. K E Y W O R D S hydrodesulfurization, mixed naphtha, Ni Mo/γ-Al 2 O 3 , sulfiding, total sulfur content Highlights • Ni/γ-Al 2 O 3 , Ni/HZSM5, Co/HZSM5, Mo/HZSM5, and Ni Mo/γ-Al 2 O 3 catalysts were synthesized and evaluated in HDS reactions of mixed naphtha. • The catalytic performance and characteristic for prepared catalysts were compared with a commercial industrial catalyst supplied by AXENS company. • Synthesized 3.5Ni-17Mo/γ-Al 2 O 3 showed the best catalytic performance with HDS conversion of 94.2%. • All reactor tests were performed according to the operating conditions of an AXENS licensed industrial Naphtha Hydro-Treating (NHT) unit, except process pressure, which was applied atmospheric.

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The effect of rapeseed oil and carbon monoxide on SRGO hydrotreating over sulfide CoMo/Al2O3 and NiMo/Al2O3 catalysts

Cited by 20 publications

References 44 publications

Detailed Characterization of Diesel Fractions from Co-Hydroprocessing Vegetable Oil and Petroleum Heavy Vacuum Gas Oil Blends

Detailed Characterization of Diesel Fractions from Co-Hydroprocessing Vegetable Oil and Petroleum Heavy Vacuum Gas Oil Blends

Production of Biofuels from Hydrodeoxygenation and Hydroisomerization of Triglycerides with Metal-Supported SAPO-11 Molecular Sieves

Performance study of Ni, Co, and Mo catalysts supported on γ ‐Al ₂ O ₃ and HZSM5 in HDS reactions of mixed naphtha

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The effect of rapeseed oil and carbon monoxide on SRGO hydrotreating over sulfide CoMo/Al2O3 and NiMo/Al2O3 catalysts

Cited by 20 publications

References 44 publications

Detailed Characterization of Diesel Fractions from Co-Hydroprocessing Vegetable Oil and Petroleum Heavy Vacuum Gas Oil Blends

Detailed Characterization of Diesel Fractions from Co-Hydroprocessing Vegetable Oil and Petroleum Heavy Vacuum Gas Oil Blends

Production of Biofuels from Hydrodeoxygenation and Hydroisomerization of Triglycerides with Metal-Supported SAPO-11 Molecular Sieves

Performance study of Ni, Co, and Mo catalysts supported on γ ‐Al 2 O 3 and HZSM5 in HDS reactions of mixed naphtha

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Performance study of Ni, Co, and Mo catalysts supported on γ ‐Al ₂ O ₃ and HZSM5 in HDS reactions of mixed naphtha