n -Decane hydro-conversion over bi- and tri-metallic Al-HMS catalyst in a mini-reactor

Abdi-Khanghah, Mahdi; Adelizadeh, Mostafa; Naserzadeh, Zahra; Zhang, Zhien

doi:10.1016/j.cjche.2018.04.007

Cited by 13 publications

(3 citation statements)

References 24 publications

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“…It might be depended on the catalyst type, which was reported by Roussel et al [24] that the transformation of n-decane occurred through two types of reaction: a bifunctional transformation and a "direct cracking" reaction. The bifunctional mechanism occurs not only on silica-alumina support with low acidity which is lowered by ammonia adsorption, but also at a high reaction temperature [25,26]. Based on these findings, it can be pointed out that n-decane converts to gas products with a bifunctional mechanism on catalysts contain Cr and Al2O3-KF.…”

Section: Effect Of Various Promoters To Cr-al2o3 Catalystmentioning

confidence: 86%

Aromatik Karışımların Hidrodealkilasyonuna Katalizör Modifikasyonun Etkisi

Ateş

Yeniova²,

Alibeyli³

2022

Politeknik Dergisi

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Hydrodealkylation of mesitylene in the presence of n-decane to benzene, toluene, and xylenes (BTX) over the promoted Cr-Al2O3 was studied. The effect of reaction temperature, WHSV, impregnation type, and amount of Cr and promoters such as V, Cs, Ni, and Mo on the stability and activıty of Cr-Al2O3 was investigated. The addition of n-decane to mesitylene accelerated the hydrodealkylation activity of Cr-Al2O3 because of the formation of methyl- and ethyl-radicals. The catalyst modified with V and Cs (V-Cs-Cr-Al2O3) has a comparable performance with the commercial catalyst Pyrotol (Houdry, USA) in terms of stability, product selectivity, and reactant conversions.

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Section: Effect Of Various Promoters To Cr-al2o3 Catalystmentioning

confidence: 86%

Aromatik Karışımların Hidrodealkilasyonuna Katalizör Modifikasyonun Etkisi

Ateş

Yeniova²,

Alibeyli³

2022

Politeknik Dergisi

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“…The mechanism of oil upgrading based on the conversion of heavy fractions to light fractions depends on experimental factors such as catalyst type 14 , upgrading reaction temperature and reaction time, and hydrogen donor agent in the reaction environment 15 . Based on different researches, Ni–W–Mo based catalysts were introduced as the best catalyst with the highest performance in oil upgrading reactions in the open literature 16 , 17 .…”

Section: Introductionmentioning

confidence: 99%

Optimization of reaction temperature and Ni–W–Mo catalyst soaking time in oil upgrading: application to kinetic modeling of in-situ upgrading

Abdi-Khanghah

Jafari

Ahmadi

et al. 2023

Sci Rep

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Decreasing the conventional sources of oil reservoirs attracts researchers’ attention to the tertiary recovery of oil reservoirs, such as in-situ catalytic upgrading. In this contribution, the response surface methodology (RSM) approach and multi-objective optimization were utilized to investigate the effect of reaction temperature and catalysts soaking time on the concentration distribution of upgraded oil samples. To this end, 22 sets of experimental oil upgrading over Ni–W–Mo catalyst were utilized for the statistical modeling. Then, optimization based on the minimum reaction temperature, catalysts soaking time, gas, and residue wt.% was performed. Also, correlations for the prediction of concentration of different fractions (residue, vacuum gas oil (VGO), distillate, naphtha, and gases) as a function of independent factors were developed. Statistical results revealed that RSM model is in good agreement with experimental data and high coefficients of determination (R2 = 0.96, 0.945, 0.97, 0.996, 0.89) are the witness for this claim. Finally, based on multi-objective optimization, 378.81 °C and 17.31 h were obtained as the optimum upgrading condition. In this condition, the composition of residue, VGO, distillate, naphtha, and gases are 6.798%, 39.23%, 32.93%, 16.865%, and 2.896%, respectively, and the optimum condition is worthwhile for the pilot and industrial application of catalyst injection during in-situ oil upgrading.

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“…However, since these metals impart dehydrating properties to catalysts, they are not resistant to the toxic effects of contact poisons present in the diesel fraction. To address this issue, it is proposed to employ catalysts promoted by metals such as Ni and Mo; this is attributed to the fact that catalysts based on these metals exhibit high hydrogenating activity even in the presence of significant sulfur content in the raw material [13][14][15]. On the other hand, the use of this type of metal significantly reduces production costs and increases the volume of fuel produced.…”

Section: Introductionmentioning

confidence: 99%

The Role of Catalyst Promotive Additives and Temperature in the Hydroisodewaxing Process

Abdildina,

Vassilina,

Abdrassilova

et al. 2023

Molecules

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One of the valuable fractions of paraffinic oils is the diesel fraction, which can be used as a commercial fuel. However, the high content of alkanes of normal structure (~10–40%) in the diesel fraction leads to a deterioration in the performance characteristics of the fuel and, as a result, the inability to use the diesel fraction without additional processing in the cold season at lower temperatures, which is critical for many regions with cold winters. The process of catalytic dewaxing is one of the most promising ways to improve the low-temperature characteristics of diesel fractions. This work is devoted to studying the activity of promoted Ni, Mo, and Ni-Mo catalysts based on mesoporous aluminosilicate and pre-activated bentonite in dewaxing diesel fractions. The effect of the nature and content of promoting additives on the activity of bifunctional catalysts in the process of hydroisodewaxing of diesel fraction in a flow-type reactor in the temperature range of 260–340 °C, pressure of 2 MPa and feed space velocity of 1 h–1 was studied. It is shown that the synthesized bifunctional catalysts based on mesoporous aluminosilicate and pre-activated bentonite from the Tagan field (Ni/MAS-H-bentonite, Mo/MAS-H-bentonite, and Ni-Mo/MAS-H-bentonite) have the necessary balance of Lewis and Bronsted acid centers strengths. It allows them to selectively conduct the hydroisodewaxing process. It has been established that the use of the synthesized 5% Ni-1% Mo/MAS-H-bentonite bifunctional catalyst in the diesel fractions hydroisodewaxing process under optimal process conditions makes it possible to obtain diesel fuel with low-temperature characteristics that meet the requirements for cold climate fuels: cold filter plugging point (CFPP)—minus 33 °C, flash point in a closed cup—39 °C and pour point—minus 36 °C.

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n -Decane hydro-conversion over bi- and tri-metallic Al-HMS catalyst in a mini-reactor

Cited by 13 publications

References 24 publications

Aromatik Karışımların Hidrodealkilasyonuna Katalizör Modifikasyonun Etkisi

Aromatik Karışımların Hidrodealkilasyonuna Katalizör Modifikasyonun Etkisi

Optimization of reaction temperature and Ni–W–Mo catalyst soaking time in oil upgrading: application to kinetic modeling of in-situ upgrading

The Role of Catalyst Promotive Additives and Temperature in the Hydroisodewaxing Process

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