Selective hydrotreating and hydrocracking of FCC light cycle oil into high-value light aromatic hydrocarbons

Young-Seok, Oh; Shin, Jaeuk; Noh, Haeseong; Kim, Chanwoo; Kim, Yong‐Su; Lee, Yong‐Kul; Lee, Jeong Kyu

doi:10.1016/j.apcata.2019.03.004

Cited by 50 publications

(26 citation statements)

References 46 publications

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“…Therefore, in our case, optimum conditions were 400 °C, 7.4 MPa and LHSV of 0.8 h −1 , using the NiMo/ZSM-5 (50) material for a 31.0% BTX enriched fraction (overall BTX yield of 30.1%, due to the 97% liquid fraction). This value was lower than the 68.5% BTX enriched fraction obtained by Oh et al [18]; however, the overall BTX yield obtained by them was 33.1% due to over-cracking (liquid fraction of 48.4%).…”

Section: Effect Of the Experimental Conditions On The Btx Yieldcontrasting

confidence: 62%

“…The concentration of aromatic hydrocarbons in the obtained naphtha was 30 wt%. While maintaining the pressure at 6 MPa and WHSV of 2 h −1 , Oh et al [18] observed an increment in HDT LCO hydrocracking by increasing the temperature from 375 to 425 °C, which was evidenced by the amount of the gas phase formed. Figure 7 shows a comparison between experimental conditions and the BTX yield.…”

Section: Effect Of the Experimental Conditions On The Hck Yield And Bmentioning

confidence: 99%

“…However, the decrease in LHSV did not show the same effect on increasing the BTX selectivity as it happened in our work. Oh et al [18] observed an increment in the BTX selectivity during the HCK process by increasing the temperature from 375 to 425 °C, at 6 MPa and WHSV of 2 h −1 . However, due to the decrease in the liquid phase yield caused by the excessive HCK, a moderate BTX yield was produced.…”

Section: Effect Of the Experimental Conditions On The Btx Yieldmentioning

confidence: 99%

“…Oh et al [18] presented a detailed work on the design of a specific catalyst for BTX production departing from optimized HDT LCO. By means of a HCK Mo-S/BZ (BZ = H-Beta + H-ZSM-5) catalyst, the authors obtained a BTX enriched fraction with a MAH yield close to the : 357 to 450 °C, 6 MPa, WHSV of 2 h −1 and a H 2 /Oil ratio of 1972 m 3 /m 3 . In a previous study, Laredo et al [3] worked on the hydrocracking of tetralin for BTX production using mixtures of NiMo/Al 2 O 3 and ZSM-5 catalysts.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Effect Of the Experimental Conditions On The Btx Yieldcontrasting

confidence: 62%

Section: Effect Of the Experimental Conditions On The Hck Yield And Bmentioning

confidence: 99%

Section: Effect Of the Experimental Conditions On The Btx Yieldmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…The BTX has mainly been produced from catalytic reforming of naphtha and naphtha pyrolysis [2,3]. The other production method of BTX is the hydrodealkylation of C9+ aromatics in the presence of a variety of catalysts such as metal oxides and zeolite catalysts [4][5][6][7]. Among studied catalysts, chrome-based catalysts are the most promising catalyst and mostly used in commercial processes [8,9].…”

Section: Introductionmentioning

confidence: 99%

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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Optimizing support acidity of NiMo catalysts for increasing the yield of benzene, toluene and xylene in tetralin hydrocracking

Chen,

Huo,

Zhao

et al. 2023

Front. Chem. Sci. Eng.

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Selective hydrotreating and hydrocracking of FCC light cycle oil into high-value light aromatic hydrocarbons

Cited by 50 publications

References 46 publications

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

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

Aromatik Karışımların Hidrodealkilasyonuna Katalizör Modifikasyonun Etkisi

Optimizing support acidity of NiMo catalysts for increasing the yield of benzene, toluene and xylene in tetralin hydrocracking

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