Activity comparison of Ni-Mo/Al2O3 and Ni-Mo/TiO2 catalysts in hydroprocessing of middle petroleum distillates and their blend with rapeseed oil

Vozka, Petr; Orazgaliyeva, Diana; Šimáček, Pavel; Blažek, Josef

doi:10.1016/j.fuproc.2017.08.019

Cited by 22 publications

(15 citation statements)

References 27 publications

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“…Actually, most of the works on hydrotreating (HDT) of the liquid feedstock were mainly focused on only one feed type. However, Vozka et al (2017) have studied the catalyst performance on a mixture of some distillates.…”

Section: Edited By Xiu-qin Zhumentioning

confidence: 99%

Comparison of performance of Ni–Mo/γ-alumina catalyst in HDS and HDN reactions of main distillate fractions

2019

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A bimetallic nickel-molybdenum catalyst supported on γ-alumina was synthesized by the two-step incipient wetness impregnation technique. The activity of the prepared Ni-Mo/γ-alumina catalyst was evaluated in a down flow fixed-bed microreactor. In this way, hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) reactions of the main distillate fractions of crude oil were assessed. XRD, SEM, TPR, ICP-OES, BET-BJH and nitrogen adsorption/desorption methods were used for characterizing the synthesized Ni-Mo/γ-alumina catalyst. The active metals with Ni/Mo mass ratio of 0.23 and total metal of 13.7 wt% were loaded on the support, similar to the commercial industrial catalyst. The performance tests were conducted at 3.0 MPa (for light naphtha and heavy naphtha) and at 4.5 MPa (for kerosene and gas oil). The results revealed that the total sulfur conversion of the light naphtha, heavy naphtha, kerosene and gas oil fractions was 98.3%, 95%, 91.7% and 90.1% (after 24 h), respectively.

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Section: Edited By Xiu-qin Zhumentioning

confidence: 99%

Comparison of performance of Ni–Mo/γ-alumina catalyst in HDS and HDN reactions of main distillate fractions

2019

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“…Perhaps a titanium compound was added into the catalyst during the production. The discovery of titanium explains the low specific surface area of the catalyst [18]. However, the titanium may have improved the catalyst.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

“…Synergy usually occurs between the support and the active metal components of the hydrocracking catalyst with the use of titanium as opposed to aluminum. In addition, TiO 2 has been found to be an unsuitable support for use at high temperatures due to its low specific surface area, low mechanical strength, and low thermal stability of the active anatase structure [18,23]. Therefore, the support should be composed of a mix oxides of TiO 2 and Al 2 O 3 to take advantage of the beneficial features of both oxides and to produce a higher catalytic activity [18].…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Optimization of Bio-Hydrogenated Kerosene from Refined Palm Oil by Catalytic Hydrocracking

2019

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In this work, hydro-processing was used as an alternative route for producing bio-hydrogenated kerosene (BHK) from refined bleached deodorized palm oil (RPO) in the presence of a 0.5 wt% Pd/Al2O3 catalyst. The Box-Behnken Design was used to determine the effects of reaction temperature, H2 pressure, and reaction time in terms of liquid hourly space velocity (LHSV) on BHK production. The kerosene selectivity was used as the response for staticial interpretation. The results show that both temperature and LHSV produced significant effects, whereas H2 pressure did not. The optimal conditions were found to be 483 °C, 5.0 MPa, and 1.4 h−1 LHSV; these conditions provided approximately 57.30% kerosene selectivity and a 47.46% yield. The BHK product had a good heating value and flash point. However, the mass percentage of carbon and hydrogen was 99.1%, which is just below the minimum standard (99.5%), according to the carbon loss by the reaction pathway to form as CO and CO2. Water can be produced from the reaction induced by oxygen removal, which results in a high freezing point.

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“…Alumina is the most common support used for hydrotreating catalyst because of its acceptable mechanical and intrinsic acid-base properties, low-cost prices, and tunable surface physicochemical properties [21][22][23][24][25][26]. The in uence of the nature of the alumina support on the catalyst activity in HDS of straight-run gas oil was scarcely reported.…”

Section: Introductionmentioning

confidence: 99%

Comparison of γ and δ-Al2O3 supported CoMo catalysts in the hydrodesulfurization of straight-run gas oil

2019

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The e ect of two di erent crystal species of alumina on the hydrodesulfurization activity of the corresponding CoMo catalysts was studied. Cylindrical extruded alumina with two di erent crystal structures, i.e., -Al2O3 and -Al2O3, was prepared using boehmite and nitric acid as a peptizing agent by calcination at 550 C and 900 C, respectively. Al2O3 supports were impregnated with 9 wt.% of Mo and 2 wt.% Co by an incipient wetness impregnation method. CoMo/Al 2 O 3 catalysts were used for hydrodesulfurization (HDS) and hydrodenitri cation (HDN) of Iranian Straight-Run Gas Oil (ISRGO). The supports and catalysts were characterized by nitrogen adsorptiondesorption isotherm, XRD, UV-vis-DRS, TPD, TPR, CO chemisorption, and ICP-OES. The HDS activity of CoMo/ -Al2O3 catalyst was higher than that of CoMo/ -Al2O3 and was found to be 95.74%. This result was obtained from the formation of larger CoMoO 4 and MoO 3 crystals in CoMo/ -Al 2 O 3 catalyst, thus reducing the active metal phase dispersion and the performance of the catalyst. The HDS activity of CoMo/ -Al2O3 catalyst was remarkable as the metal content of the catalyst was low. The HDN activity of CoMo/ -Al2O3 was also about 66%.

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Activity comparison of Ni-Mo/Al2O3 and Ni-Mo/TiO2 catalysts in hydroprocessing of middle petroleum distillates and their blend with rapeseed oil

Cited by 22 publications

References 27 publications

Comparison of performance of Ni–Mo/γ-alumina catalyst in HDS and HDN reactions of main distillate fractions

Comparison of performance of Ni–Mo/γ-alumina catalyst in HDS and HDN reactions of main distillate fractions

Optimization of Bio-Hydrogenated Kerosene from Refined Palm Oil by Catalytic Hydrocracking

Comparison of γ and δ-Al2O3 supported CoMo catalysts in the hydrodesulfurization of straight-run gas oil

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