Mild hydrocracking of 1-methyl naphthalene (1-MN) over alumina modified zeolite

Park, Joo Il; Ali, Syed A.; Alhooshani, Khalid; Azizi, Nor; Miyawaki, Jin; Kim, Tae-Gon; Lee, Youngjin; Kim, Hyun‐Seok; Yoon, Seong Ho; Mochida, Isao

doi:10.1016/j.jiec.2012.09.014

Cited by 34 publications

(17 citation statements)

References 14 publications

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“…Additionally, it is well known [1,2,10] that catalysts play a key role in the hydrogenation (partial saturation) of naphthalene followed by the selective cracking of naphthenic structures, producing one-ring-aromatic hydrocarbons with alkyl chains. For this purpose, bifunctional catalysts with acid (support) and metal (hydrogenation-dehydrogenation) functions are frequently used [11,12]. However, an excess of hydrogenation activity, and strong acidity may crack molecules excessively into light gaseous hydrocarbons and accelerate coke deposition.…”

Section: Introductionmentioning

confidence: 99%

Effect of the catalyst in the BTX production by hydrocracking of light cycle oil

et al. 2021

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Catalysts to produce the important petrochemicals like benzene, toluene, and xylene (BTX) from refinery feedstocks, like light cycle oil (LCO) are reviewed here by covering published papers using model mixtures and real feeds. Model compounds experiments like tetralin and naphthalene derivatives provided a 53–55% total BTX yield. Higher yields were never attained due to the inevitable gas formation and other C9+-alkylbenzenes formed. For tetralin, the best catalysts are those conformed by Ni, CoMo, NiMo, or NiSn over zeolite H-Beta. For naphthalene derivatives, the best catalysts were those conformed by W and NiW over zeolite H-Beta silylated. Real feeds produced a total BTX yield of up to 35% at the best experimental conditions. Higher yields were never reached due to the presence of other types of hydrocarbons in the feed which can compete for the catalytic sites. The best catalysts were those conformed by Mo, CoMo, or NiMo over zeolite H-Beta. Some improvements were obtained by adding ZSM-5 to the support or in mixtures with other catalysts.

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Section: Introductionmentioning

confidence: 99%

Effect of the catalyst in the BTX production by hydrocracking of light cycle oil

et al. 2021

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“…These types of studies are usually carried out using model mixtures [1]. However, when a catalyst or a process is almost ready for scaling up or commercial applications, experiments with real feedstocks are mandatory [2,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of the experimental conditions on BTX formation from hydrotreated light cycle oil

et al. 2020

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The study of a light cycle oil (LCO) upgrading alternative involving hydrotreating and hydrocracking/transalkylation procedures for obtaining a benzene, toluene and xylene (BTX) enriched fraction is presented. The research work was focused on the effect of the experimental conditions on the hydrocracking of an hydrotreated light cycle oil (HDT LCO) in order to produce the highest amounts of BTX, when the catalysts consisted of a mixture (50/50 in weight) of nickel-molybdenum on alumina (NiMo/Al 2 O 3) and ZSM-5 materials (NiMo/ZSM-5 (50)). It was found that 7.4 MPa, up to 375 °C, LHSV of 1.2 h −1 and a H 2 /Oil value of 442 m 3 /m 3 were the optimal experimental conditions for producing an enriched BTX fraction (31%). In order to facilitate the analysis, the study was carried out considering four types of hydrocarbons as lumps for the feed and HCK products: light hydrocarbons (LHC) composed by C4-C7 non-aromatic compounds, BTX, middle hydrocarbons (MHC) consisting of C7-C10 paraffins and isoparaffins, alkylbenzenes, tetralin and naphthalene derivatives and a small amount of high molecular weight hydrocarbons (HHC). Based on this description, HDT LCO used as feedstock for the hydrocracking (HCK) procedure, presents a 99% of a MHC fraction. The HCK conversion, BTX selectivity and yields were obtained from the chromatographic analysis of the products. A simple kinetic model considering only the MHC conversion was carried out. The obtained activation energy confirmed the endothermic nature of the HCK process. The activity decay of the catalytic mixture was also studied by varying the time on stream.

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“…Hydrocracking of heavy oils with metal dispersed catalysts is the most suitable to obtained low boiling point or middle distillate with high value products [9,10]. In order to understand the catalytic behavior in slurry-phase reactor, several model substrates are utilized and detail reaction parameters are optimized [16][17][18].…”

Section: Introductionmentioning

confidence: 99%