Sulfur free supported MoCx and MoNx catalysts for the hydrotreatment of atmospheric gasoil and its blends with rapeseed oil

Carmona, Héctor de Paz; Horáček, J.; Tišler, Zdeněk; Akhmetzyanova, Uliana

doi:10.1016/j.fuel.2019.05.165

Cited by 17 publications

(23 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The MoCx catalyst properties were already described in a previous article. 24 Mo impregnation occurred similarly for all catalyst samples. Elemental analysis shows a mean value of 0.96% C, which indicates that the carburization procedure was successful.…”

Section: Resultsmentioning

confidence: 74%

Hydrotreating of Atmospheric Gas Oil and Co-Processing with Rapeseed Oil Using Sulfur-Free PMoCx/Al₂O₃ Catalysts

et al. 2021

Self Cite

View full text Add to dashboard Cite

Sulfur-free molybdenum carbides have the potential to replace the conventional sulfided catalysts used for hydrotreating. For these catalysts, it is not necessary to add sulfur to maintain their activity. This fact makes it worthwhile to continue working on improving their hydrotreating efficiency. According to our previous studies, the addition of Co or Ni promotes the hydrotreating activity, but only significant in the case of hydrodesulfurization efficiency (up to 30%). To increase the hydrodenitrogenation efficiency, other promoters, such as phosphorus, can be added. However, most of the published studies do not focus on coprocessing or only on hydrotreating of gas oil model molecules at a laboratory scale. In this paper, we build on our previous research by studying five sulfur-free phosphorus-modified MoCx/Al 2 O 3 catalysts (0.5, 1.5, 2.5, 3.5, and 4.5 wt %) for the hydrotreating of atmospheric gas oil and co-processing with rapeseed oil (5, 10, and 25 wt %) under industrial conditions (330−350 °C, 5.5 MPa, WHSV 1−2 h −1 ). A phosphorus content up to 1.5 wt % promoted the hydrodesulfurization (5− 10%) and the hydrodenitrogenation (10−25%) efficiencies of catalysts. Moreover, the triglycerides addition did not significantly decrease the catalyst activity during co-processing. Therefore, our results enable us to define the range of phosphorus addition that enhances MoCx activity using industrial conditions and commercial feedstocks, pointing the way to develop a suitable and sulfur-free alternative to conventional hydrotreating catalysts.

show abstract

Section: Resultsmentioning

confidence: 74%

Hydrotreating of Atmospheric Gas Oil and Co-Processing with Rapeseed Oil Using Sulfur-Free PMoCx/Al₂O₃ Catalysts

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the middle distillates hydrotreating, those MoCx and MoNx catalysts showed the significant activity of HDS and HDN, observing values of 75% for HDS and 35-40% for HDN rates with MoCx and MoNx supported on Al 2 O 3 and TiO 2 . In the case of coprocessing, these catalysts also showed significant activity, converting all the triglycerides into paraffin [161]. Table 7 shows a list of sulphur-free carbide/nitride heterogeneous catalysts used for green diesel production.…”

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

“…This can cause unwanted S-contamination in the end product and thus harmful environmental problems. Taking into account the above, research efforts in the last decade have progressively turned to the metallic form of the transition metals (e.g., Ni, Co, Fe), ,− metal carbide, − metal phosphide, − and metal nitride , catalysts.…”

Section: Introductionmentioning

confidence: 99%

Biodiesel Upgrading to Renewable Diesel over Nickel Supported on Natural Mordenite Catalysts

Fani

Lycourghiotis

Bourikas

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

In the present work the valorization of natural mordenite as a catalyst support was investigated. Natural mordenite of Greek origin was activated by acid treatment with an aqueous solution of HCl. This treatment led to a material with a high specific surface area (156 m2 g–1). Ni catalysts (10 wt % Ni) supported on activated mordenite were synthesized by incipient wetness impregnation (IWI), wet impregnation (WI), infiltration (INF), and deposition–precipitation (DP). They were evaluated for the biodiesel upgrading into renewable diesel via hydrotreatment. DP was proven to be the most effective preparation method. In fact, an almost total conversion of biodiesel and production of the highest amount of green diesel (14 wt % of the liquid product) was achieved over the catalyst prepared by DP. Its high efficiency was attributed to its enhanced specific surface area, better nickel dispersion (smaller size of crystallites), and the smaller amount of carbon deposits on its surface compared to the other catalysts of this series. When the DP method was adopted, nickel catalysts supported on activated mordenite were synthesized varying active phase loading in the range 10–30 wt %. The catalyst with the maximum nickel loading exhibited high specific surface area and the highest Ni surface area as well as a balanced population of weak and strong acid sites. These characteristics resulted in the highest efficiency for green diesel production (25 wt % of the liquid product) among the catalysts studied.

show abstract

Sulfur free supported MoCx and MoNx catalysts for the hydrotreatment of atmospheric gasoil and its blends with rapeseed oil

Cited by 17 publications

References 30 publications

Hydrotreating of Atmospheric Gas Oil and Co-Processing with Rapeseed Oil Using Sulfur-Free PMoCx/Al₂O₃ Catalysts

Hydrotreating of Atmospheric Gas Oil and Co-Processing with Rapeseed Oil Using Sulfur-Free PMoCx/Al₂O₃ Catalysts

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

Biodiesel Upgrading to Renewable Diesel over Nickel Supported on Natural Mordenite Catalysts

Contact Info

Product

Resources

About

Sulfur free supported MoCx and MoNx catalysts for the hydrotreatment of atmospheric gasoil and its blends with rapeseed oil

Cited by 17 publications

References 30 publications

Hydrotreating of Atmospheric Gas Oil and Co-Processing with Rapeseed Oil Using Sulfur-Free PMoCx/Al2O3 Catalysts

Hydrotreating of Atmospheric Gas Oil and Co-Processing with Rapeseed Oil Using Sulfur-Free PMoCx/Al2O3 Catalysts

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

Biodiesel Upgrading to Renewable Diesel over Nickel Supported on Natural Mordenite Catalysts

Contact Info

Product

Resources

About

Hydrotreating of Atmospheric Gas Oil and Co-Processing with Rapeseed Oil Using Sulfur-Free PMoCx/Al₂O₃ Catalysts

Hydrotreating of Atmospheric Gas Oil and Co-Processing with Rapeseed Oil Using Sulfur-Free PMoCx/Al₂O₃ Catalysts