Morphology effect of β-zeolite supports for Ni 2 P catalysts on the hydrocracking of polycyclic aromatic hydrocarbons to benzene, toluene, and xylene

Kim, Yong‐Su; Cho, Kye-Sung; Lee, Yong‐Kul

doi:10.1016/j.jcat.2017.03.006

Cited by 62 publications

(29 citation statements)

References 52 publications

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“…Kim et al [31] studied the effect of the support on the catalytic properties of Ni 2 P/H-Beta nano and mesoporous catalysts on the hydrocracking of 1-MN. The supports used in this study were two kinds of Beta zeolite with different crystal sizes, namely: nano-sized (β-N) and micrometersized (β-M), which were loaded with 1.5 mmol of Ni/g of support and mole ratio P/Ni = 2 by incipient wetness impregnation using an aqueous solution of Ni(NO 3 ) 2 6H 2 O and (NH 4 ) 2 HPO 4 , and followed by drying and calcination.…”

Section: Effect Of the Acidity And Support Structurementioning

confidence: 99%

“…Figure 5 shows a summary of the total BTX yield from naphthalene derivatives from the principal results [27][28][29][30][31][32][33]. The highest total BTX yield was 55% using a hydrocracking catalyst composed of 5 W(l)/Beta-0.15 (TEOS) [33] remarkably like the maximum yield attained when BTX was obtained from tetralin hydrocracking (53%).…”

Section: Partial Conclusionmentioning

confidence: 99%

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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: Effect Of the Acidity And Support Structurementioning

confidence: 99%

Section: Partial Conclusionmentioning

confidence: 99%

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

et al. 2021

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“…The adding of Ni into Cr-Al2O3 increased significantly alkyl-benzene conversion compared with other catalysts. However, it is an undesirable metal for hydrodealkylation of mesitylene due to strong hydrocracking activity for benzene [23]. Moreover, almost all of the catalysts showed almost 98-100 % hydrocracking activity of n-decane as seen in Fig.…”

Section: Effect Of Various Promoters To Cr-al2o3 Catalystmentioning

confidence: 92%

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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“…Metal phosphides, as a novel hydroprocessing catalyst group, have been introduced [15][16][17][18][19], in which Ni 2 P catalyst shows the best activity in hydroprocessing [16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Our recent studies revealed that a Ni 2 P supported on zeolite β shows a good activity in the hydrocracking of naphthalene and 1-methyl naphthalene at 673 K and 3.0-5.5 MPa [29,30], in which a bifunctional catalytic activity and inter-particulate porosity contribute to the high conversion. Considering larger-sized polycyclic hydrocarbons in real feedstock, like pyrolysis fuel oils, the microporosity of zeolites can limit the diffusion of the molecules, causing coke formation.…”

Section: Introductionmentioning

confidence: 99%

Structure and Activity of Ni2P/Desilicated Zeolite β Catalysts for Hydrocracking of Pyrolysis Fuel Oil into Benzene, Toluene, and Xylene

Kim¹,

Cho²,

Lee³

2020

Catalysts

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The effects of desilication (DS) of the zeolite β on the hydrocracking of polycyclic aromatics were investigated using the Ni2P/β catalysts. The Ni2P/β catalysts were obtained by the temperature-programmed reduction (TPR) method, and the physical and chemical properties were examined by N2 physisorption, X-ray diffraction (XRD), 27Al magic angle spinning–nuclear magnetic resonance (27Al MAS NMR), extended X-ray absorption fine structure (EXAFS), isopropyl amine (IPA) and NH3 temperature-programmed desorption (TPD), CO uptake, and thermogravimetric analysis (TGA). The catalytic activity was examined at 653 K and 6.0 MPa in a continuous fixed bed reactor for the hydrocracking (HCK) of model compounds of 1-methylnaphthalene (1-MN) and phenanthrene or a real feedstock of pyrolysis fuel oil (PFO). Overall, the Ni2P/DS-β was observed as more active and stable in the hydrocracking of polycyclic aromatics than the Ni2P/β catalyst. In addition, the Ni2P/β suffered from the coke formation, while the Ni2P/DS-β maintained the catalytic stability, particularly in the presence of large polycyclic hydrocarbons in the feed.

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Morphology effect of β-zeolite supports for Ni 2 P catalysts on the hydrocracking of polycyclic aromatic hydrocarbons to benzene, toluene, and xylene

Cited by 62 publications

References 52 publications

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

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

Aromatik Karışımların Hidrodealkilasyonuna Katalizör Modifikasyonun Etkisi

Structure and Activity of Ni2P/Desilicated Zeolite β Catalysts for Hydrocracking of Pyrolysis Fuel Oil into Benzene, Toluene, and Xylene

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