Design of selective hydrocracking catalysts for BTX production from diesel-boiling-range polycyclic aromatic hydrocarbons

Shin, Jaeuk; Young-Seok, Oh; Choi, Yong-Sung; Lee, Jihye; Lee, Jeong Kyu

doi:10.1016/j.apcata.2017.08.019

Cited by 63 publications

(45 citation statements)

References 45 publications

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“…This property is very important for hydrocracking purposes [11,15,22,23]. However, the presence of the metallic function (NiMo) in adequate amounts is necessary for decreasing the catalytic deactivation [15,19,20].…”

Section: Characterization Of the Zsm-5 And Nimo/al 2 O 3 Catalystsmentioning

confidence: 99%

“…More specifically, ZSM-5, in its hydrogen form, has Brönsted and Lewis acidity with acid OH groups at channel intersections. The presence of acid sites explains the cracking activity displayed by ZSM-5, which shows unique shapeselectivity properties due to the presence of medium-size pores [16,20]. In addition, the hydrogenation power of a metallic function is necessary to minimize excessive cracking and polymerization reactions that can poison the acid sites and finally can lead to catalyst deactivation [15,19,20].…”

Section: Introductionmentioning

confidence: 99%

“…As for this subject matter, Laredo et al [15] published a review about the selective hydrocracking of tetralin using different materials, with and without metallic functionalities. Recently, Shin et al [20] studied the design of a catalyst with the appropriate balance of hydrogenation and acidity characteristics for producing BTX from polycyclic aromatics present in diesel-boiling-range feedstocks like LCO. These scientists concluded that a suitable catalyst for a 54.3% BTX yield (theoretical maximum of 67.1%) from tetralin could be synthesized by supporting nickel and molybdenum on a mechanical mixture of Beta and HZSM-5 zeolites with a 90/10 ratio when reacting at 425 °C.…”

Section: Introductionmentioning

confidence: 99%

“…In conclusion, a bi-functional catalyst is required to have both hydrogenation capacity for avoiding deactivation by carbon deposition [12,13] and acidic functions for hydrocracking purposes [15,20]. Therefore, the hydrogenation capabilities of a metallic catalyst (NiMo/Al 2 O 3 ) combined with the acidic function of a zeolitic material (ZSM-5) were used to study the tetralin hydrocracking for BTX production, focusing on the compromise between BTX selectivity and catalyst deactivation.…”

Section: Introductionmentioning

confidence: 99%

“…In order to avoid the interference of the metal moieties on the acidic zeolite structure, as Sato et al [18] reported, it was used a mechanical mixture of NiMo/Al 2 O 3 and ZSM-5. This mixture was chosen taking into account the adequate hydrogenation activity of the NiMo metals mixture and the acidic properties of the ZSM-5 zeolite, with high dealkylation activity [16,20]. The study was carried out in a trickle-bed reactor at 450-500 °C, 3.9-5.9 MPa, 1.3/h (liquid hourly space velocity, LHSV) and 117-267, H 2 /feed volume ratio m 3 /m 3 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of the catalytic system and operating conditions on BTX formation using tetralin as a model molecule

et al. 2019

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Light cycle oil (LCO) is an inexpensive feedstock for the production of high-added-commercial-value-mono-aromatic compounds such as benzene, toluene and xylenes (BTX). To extend the knowledge on the processing of LCO for BTX production, the hydrocracking reaction was studied using a commercial NiMo/Al 2 O 3 catalyst, ZSM-5 zeolite and their mechanical mixtures (20/80, 30/70 and 50/50) for processing tetralin as model feedstock in a bench-scale-trickle-bed reactor at 450-500 °C, 3.9-5.9 MPa, 1.3 1/h and H 2 /feed volume ratio of 168-267 m 3 /m 3. Accessible, well-dispersed and strong Brönsted acid sites eased the hydrocracking of tetralin to BTX and the metallic hydrogenation functions from nickel-molybdenum catalysts were also required to minimize deactivation. To achieve suitable tetralin conversions (86-95 wt%), high BTX selectivity in the liquid phase (44-70 wt%) and suitable catalytic activities for coke precursor hydrogenation (to reduce deactivation), NiMo/Al 2 O 3 //ZSM-5 mixtures (50-80 ZSM-5) were employed, which probed to be effective.

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Section: Characterization Of the Zsm-5 And Nimo/al 2 O 3 Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of the catalytic system and operating conditions on BTX formation using tetralin as a model molecule

et al. 2019

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Sustainable Liquid‐Organic‐Hydrogen‐Carrier‐Based Hydrogen‐Storage Technology Using Crude or Waste Feedstock/Hydrogen

Kim,

Yoon,

Kim

et al. 2024

Adv Energy and Sustain Res

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For liquid organic hydrogen carrier (LOHC) technology to be competitive with other H2‐storage methods, it is crucial to reduce the cost of LOHC materials occupying the high proportion of the embodied energy required for system implementation. Promising approaches are to convert crude or waste feedstock into LOHC materials and to utilize crude hydrogen sources obtained from various routes. Thus, in this review, the state‐of‐the‐art advances in sustainable LOHC‐based hydrogen storage using crude or waste feedstock, associated with their conversion into LOHC materials, and coupling crude hydrogen with LOHC system to obtain high‐purity H2 without separation and purification are highlighted. Petroleum sources like light cycle oil and pyrolysis fuel oil are used after liquid–liquid extraction, combined distillation/hydroprocessing, and one‐pot hydrotreating–hydrocracking. In case of converting renewable resources (e.g., biomass and plastic waste), depolymerization followed by hydrodeoxygenation is an effective approach. To utilize crude hydrogen sources for hydrogen storage, catalysts should be designed and synthesized toward activating LOHC hydrogenation reaction at lower temperatures, along with high CO resistance. Consequently, this context provides guidance for the development of LOHC technology to accelerate its commercialization.

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Extraction of polycyclic aromatic hydrocarbons from fluid catalytic cracking diesel with ionic liquids

Gao

Liu

et al. 2022

AIChE Journal

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Ionic liquids (ILs) as promising green solvents were first proposed to extract polycyclic aromatic hydrocarbons (PAHs) from fluid catalytic cracking (FCC) diesel. The COSMO-RS model was used for preliminary screening of IL extractants. The liquid-liquid equilibrium (LLE) experiments were performed to show that the IL [BMIM][BF 4 ] has a high selectivity for the model oil system. Further, the LLE experimental results show that the solubility of 1-methylnaphthalene in [BMIM][BF 4 ] is relatively low, while the IL exhibits a high selectivity of n-hexadecane to 1-methylnaphthalene. This means that the use of [BMIM][BF 4 ] can obtain the high-purity products when considering the almost nonvolatility of IL. Compared to the benchmark process, the multistage countercurrent-reflux extraction process can improve the PAHs purity by about 2% at the expense of 5.06% total annual cost and 6.42% energy consumption, rendering the use of IL to extract PAHs from FCC diesel more feasible in industry.

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Design of selective hydrocracking catalysts for BTX production from diesel-boiling-range polycyclic aromatic hydrocarbons

Cited by 63 publications

References 45 publications

Effect of the catalytic system and operating conditions on BTX formation using tetralin as a model molecule

Effect of the catalytic system and operating conditions on BTX formation using tetralin as a model molecule

Sustainable Liquid‐Organic‐Hydrogen‐Carrier‐Based Hydrogen‐Storage Technology Using Crude or Waste Feedstock/Hydrogen

Extraction of polycyclic aromatic hydrocarbons from fluid catalytic cracking diesel with ionic liquids

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