Kinetics of dibenzothiophene hydrodesulfurization reactions using CoMoP/Al2O3 and NiMoP/Al2O3

Nascimento, Idia G.; Locatel, William de Rezende; Magalhães, Bruno C.; Travalloni, Leonardo; Zotin, José Luiz; Silva, Mônica A. P. da

doi:10.1016/j.cattod.2020.07.013

Cited by 13 publications

(7 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, when simulating a TBR, including mass and energy balances, and using LHHW kinetic models, the computational complexity augments compared with employing power-law kinetic models and might not yield significantly more accurate results. 1,38,42 For these reasons, their usage in recent HDS kinetic modeling studies for ULSD production is scarce.…”

Section: Kinetic Models Based On Model Sulfur Compoundsmentioning

confidence: 99%

“…At the production end of the petroleum value chain, it has been estimated that around 60% of the total crude oil produced is upgraded into transportation fuels by refineries. 1,2 Regarding energy consumption, in accordance with the Energy Information Administration, in 2020, approximately 95% of the whole transportation energy consumed was acquired from liquid and gas petroleum-derived fuels, and diesel represented 37.4% of the total. This percentage is forecasted to start to decline in the upcoming decades due to renewable energy alternatives; however, diesel fuels share is estimated to be nearly 30% in 2050.…”

Section: Introductionmentioning

confidence: 99%

“…Diesel is a liquid fuel extensively used in highway vehicles (e.g., cars, trucks, and buses) and non-highway vehicles (e.g., marine vessels, locomotives, agricultural equipment, and aircraft). At the production end of the petroleum value chain, it has been estimated that around 60% of the total crude oil produced is upgraded into transportation fuels by refineries. , Regarding energy consumption, in accordance with the Energy Information Administration, in 2020, approximately 95% of the whole transportation energy consumed was acquired from liquid and gas petroleum-derived fuels, and diesel represented 37.4% of the total. This percentage is forecasted to start to decline in the upcoming decades due to renewable energy alternatives; however, diesel fuels share is estimated to be nearly 30% in 2050. , Diesel engines are 25–40% more efficient than gasoline engines, but diesel combustion can emit particulate matter, CO, NO x , and SO x gases, which are harmful to human health and the environment.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Kinetic Models of Deep Hydrotreating Reactions to Produce Ultralow Sulfur Diesel

et al. 2023

View full text Add to dashboard Cite

Due to the current worldwide environmental problems caused by high emissions of polluting gases such as CO, NO x , and SO x , resulting from the combustion of fossil fuels, many organizations and governments have established standards aimed at producing cleaner and more environmentally friendly fuels. These standards focus on eliminating hazardous substances, particularly the sulfur compounds in diesel, as they are among the most harmful organic compounds to both human health and the environment. Hydrotreating is the main refinery process used to produce ultralow sulfur diesel. For proper modeling and simulation of this process, it is mandatory to develop adequate kinetic models that include all the reactions taking place during the hydrotreating of gas oil, as well as the removal of the most refractory compounds present in the chemical composition of diesel, such as 4-MDBT and 4,6-DMDBT. This work reports an exhaustive discussion of the kinetic models of hydrotreating reactions for the production of ultralow sulfur diesel reported so far in the literature. The main topics include the reaction systems, type of catalysts, and operating conditions. A comparison of the reported kinetic parameters was also carried out. Finally, a set of kinetic models to be considered for the simulation of the hydrotreating process to produce ultralow sulfur diesel is proposed.

show abstract

Section: Kinetic Models Based On Model Sulfur Compoundsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Kinetic Models of Deep Hydrotreating Reactions to Produce Ultralow Sulfur Diesel

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Hydrodesulfurization (HDS) is the most commonly used technology to produce clean fuels by employing hydrotreating catalysts, mainly from Co(Ni)/Mo oxides supported on alumina [3][4][5][6][7][8][9][10][11]. The production of ultra-low fuels using the HDS process at present requires extreme and expensive operating conditions, viz., high temperatures, hydrogen and highly active catalysts.…”

Section: Introductionmentioning

confidence: 99%

Effect of Adding Chelating Ligands on the Catalytic Performance of Rh-Promoted MoS2 in the Hydrodesulfurization of Dibenzothiophene

2021

View full text Add to dashboard Cite

Hydrodesulfurization (HDS) is a widely used process currently employed in petroleum refineries to eliminate organosulfur compounds in fuels. The current hydrotreating process struggles to remove organosulfur compounds with a steric hindrance due to the electronic nature of the current catalysts employed. In this work, the effects of adding chelating ligands such as ethylenediaminetetraacetic acid (EDTA), citric acid (CA) and acetic acid (AA) to rhodium (Rh) and active molybdenum (Mo) species for dibenzothiophene (DBT) HDS catalytic activity was evaluated. HDS activities followed the order of RhMo/ɣ-Al2O3 (88%) > RhMo-AA/ɣ-Al2O3 (73%) > RhMo-CA/ɣ-Al2O3 (72%) > RhMo-EDTA/ɣ-Al2O3 (68%). The observed trend was attributed to the different chelating ligands with varying electronic properties, thus influencing the metal–support interaction and the favorable reduction of the Mo species. RhMo/ɣ-Al2O3 offered the highest HDS activity due to its (i) lower metal–support interaction energy, as observed from the RhMo/ɣ-Al2O3 band gap of 3.779 eV and the slight shift toward the lower BE of Mo 3d, (ii) increased Mo-O-Mo species (NMo-O-Mo ~1.975) and (iii) better sulfidation of Rh and MoO in RhMo/ɣ-Al2O3 compared to the chelated catalysts. The obtained data provides that HDS catalytic activity was mainly driven by the structural nature of the RhMo-based catalyst, which influences the formation of more active sites that can enhance the HDS activity.

show abstract

“…Various methods have been used for the desulfurization of gasoline such as hydrogen desulfurization (HDS) [2][3][4], adsorption desulfurization [5,6], extraction desulfurization [7][8][9], oxidative desulfurization. [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Elimination of dibenzothiophene from n-hexane by nano-composite membrane containing Cu-MOF in a pervaporation process

et al. 2020

View full text Add to dashboard Cite

In this study, a particular type of thin film nano-composite membranes was prepared and used in the pervaporation process. The membranes were made of polyphenylsulfone and were coated with a thin layer of polydimethylsiloxane containing different amount of Cu-metal-organic framework (MOF) nano-structures. N-hexane containing dibenzothiophene was used as a model fuel. To characterize MOF and the prepared membranes, Fourier transform infrared, X-Ray diffraction, Brunauer-Emmett-Teller, field-emission scanning electron microscopy, water contact angle measurements, and thermogravimetric analysis were used. The effect of parameters such as sulfur content, process temperature, and Cu-MOF concentration on the membrane performance was evaluated. The results indicated that nano-composite membranes demonstrate a much better performance compared to the untreated membrane. The membrane containing 5 wt% Cu-MOF with a contact angle of 97° had more hydrophilic surface and proved the effect of the additive in improving the surface hydrophilicity. This membrane had the highest rate of flux and rejection (0.4 kg/m 2 h and 70%, respectively), and the lowest enrichment factor (0.3). As the temperature increased, the flux of M 4 membrane (with 5 wt% additive) increased, while the removal efficiency decreased significantly. The optimum temperature for desulfurization in the pervaporation process was obtained (50 °C).

show abstract

Kinetics of dibenzothiophene hydrodesulfurization reactions using CoMoP/Al2O3 and NiMoP/Al2O3

Cited by 13 publications

References 54 publications

Kinetic Models of Deep Hydrotreating Reactions to Produce Ultralow Sulfur Diesel

Kinetic Models of Deep Hydrotreating Reactions to Produce Ultralow Sulfur Diesel

Effect of Adding Chelating Ligands on the Catalytic Performance of Rh-Promoted MoS2 in the Hydrodesulfurization of Dibenzothiophene

Elimination of dibenzothiophene from n-hexane by nano-composite membrane containing Cu-MOF in a pervaporation process

Contact Info

Product

Resources

About