Hydrotreating atmospheric gasoil and co-processing with rapeseed oil using supported Ni-Mo and Co-Mo carbide catalysts

Carmona, Héctor de Paz; Akhmetzyanova, Uliana; Tišler, Zdeněk; Vondrová, Pavla

doi:10.1016/j.fuel.2020.117363

Cited by 17 publications

(13 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

See 1 more Smart Citation

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

2021

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…No solids were found for the commercial catalysts compared to the solids produced by the two phonolite-derived catalysts. This solid production could be due to the reaction of glycerol [ 24 ]. Here, glycerol can be transformed into propane and propylene, and into carbonaceous solids when phonolite catalysts are present, in which case the gaseous products include lower amounts of C3 gases (propylene, propane) ( Table 5 ).…”

Section: Resultsmentioning

confidence: 99%

Oxalic Acid as a Hydrogen Donor for the Hydrodesulfurization of Gas Oil and Deoxygenation of Rapeseed Oil Using Phonolite-Based Catalysts

et al. 2020

Self Cite

View full text Add to dashboard Cite

The use of renewable local raw materials to produce fuels is an important step toward optimal environmentally friendly energy consumption. In addition, the use of these sources together with fossil fuels paves the way to an easier transition from fossil to renewable fuels. The use of simple organic acids as hydrogen donors is another alternative way to produce fuel. The present work reports the use of oxalic acid as a hydrogen donor for the catalytic hydrodesulfurization of atmospheric gas oil and the deoxygenation of rapeseed oil at 350 °C. For this process, one commercial NiW/SiO2–Al2O3 solid and two NiW/modified phonolite catalysts were used, namely Ni (5%) W (10%)/phonolite treated with HCl, and Ni (5%) W (10%)/phonolite treated with oxalic acid. The fresh phonolite catalysts were characterized by Hg porosimetry and N2 physisorption, ammonia temperature programmed desorption (NH3-TPD), X-ray diffraction (XRD), and X-ray fluorescence (XRF). The sulfided metal phonolite catalysts were characterized by XRD and XRF. Hydrodesulfurization led to a decrease in sulfur content from 1 to 0.5 wt% for the phonolite catalysts and to 0.8 wt% when the commercial catalyst was used. Deoxygenation led to the production of 15 and 65 wt% paraffin for phonolite and commercial solids, respectively. The results demonstrate the potential of using oxalic acid as a hydrogen donor in hydrotreating reactions.

show abstract

“…This addition increases the catalyst activity significantly due to the ensemble and ligand effects. The effect of promotor addition has already been described for hydrotreating model molecules [169,170] and industrial feedstocks [162], resulting in a significant increase in HDS activity of the MoCx of up to 80%. This activity is comparable with conventional hydrotreating catalysts, but the HDN is still low.…”

Section: Sulphur-free Catalystsmentioning

confidence: 99%

The Catalysed Transformation of Vegetable Oils or Animal Fats to Biofuels and Bio-Lubricants: A Review

et al. 2021

Self Cite

View full text Add to dashboard Cite

This review paper summarizes the current state-of-the-art of the chemical transformation of oils/fats (i.e., triacylglycerols) to the use of biofuels or bio-lubricants in the means of transport, which is a novelty. The chemical transformation is necessary to obtain products that are more usable with properties corresponding to fuels synthesized from crude oil. Two types of fuels are described—biodiesel (the mixture of methyl esters produced by transesterification) and green diesel (paraffins produced by hydrogenation of oils). Moreover, three bio-lubricant synthesis methods are described. The transformation, which is usually catalysed, depends on: (i) the type and composition of the raw material, including alcohols for biodiesel production and hydrogen for green diesel; (ii) the type of the catalyst in the case of catalysed reactions; (iii) the reaction conditions; and (iv) types of final products. The most important catalysts, especially heterogeneous and including reaction conditions, for each product are described. The properties of biodiesel and green diesel and a comparison with diesel from crude oil are also discussed.

show abstract

Hydrotreating atmospheric gasoil and co-processing with rapeseed oil using supported Ni-Mo and Co-Mo carbide catalysts

Cited by 17 publications

References 31 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

Oxalic Acid as a Hydrogen Donor for the Hydrodesulfurization of Gas Oil and Deoxygenation of Rapeseed Oil Using Phonolite-Based Catalysts

The Catalysed Transformation of Vegetable Oils or Animal Fats to Biofuels and Bio-Lubricants: A Review

Contact Info

Product

Resources

About