High Performance Ni Based Catalyst for Toluene Hydrocracking

Molero, Hebert; Galarraga, C.; Feng, Felicia; Hernández, Eumir; Birss, Viola I.; Pereira, P.

doi:10.1007/s10562-009-0128-3

Cited by 8 publications

(5 citation statements)

References 35 publications

(41 reference statements)

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“…Since the discovery of this new ring opening chemistry, a number of groups have been looking at various aspects related to the catalytic conversion of pyrolysis gasoline into a synthetic steam cracker feed, either through the direct or the two‐stage route 88–94. It remains to be seen, whether this catalytic chemistry is getting economically viable, if and when a more far‐reaching reduction of the aromatics content in gasoline will be mandated by legislation.…”

Section: Hydrocracking Of One‐ring Aromatics Into a Synthetic Steamentioning

confidence: 99%

“…[82b] Since the discovery of this new ring opening chemistry, a number of groups have been looking at various aspects related to the catalytic conversion of pyrolysis gasoline into a synthetic steam cracker feed, either through the direct or the twostage route. [88][89][90][91][92][93][94] It remains to be seen, whether this catalytic chemistry is getting economically viable, if and when a more far-reaching reduction of the aromatics content in gasoline will be mandated by legislation. In any event, the conversion of surplus aromatics is an impressive example for the versatility of catalytic hydrocracking, and the same holds true for another potential application that is briefly discussed in the subsequent Section.…”

Section: Hydrocracking Of One-ring Aromatics Into a Synthetic Steamcrmentioning

confidence: 99%

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Catalytic Hydrocracking—Mechanisms and Versatility of the Process

2012

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Hydrocracking of saturated hydrocarbons can proceed by means of four distinctly different mechanisms. On bifunctional catalysts comprising hydrogenation/dehydrogenation and Brønsted acid sites alkenes and carbocations occur as intermediates. The current mechanistic views of bifunctional hydrocracking of long‐chain n‐alkanes are discussed in detail with emphasis on the now widely accepted concept of ideal hydrocracking. Other mechanisms are hydrogenolysis and Haag–Dessau hydrocracking which proceed, respectively, on monofunctional metallic and acidic catalysts. Even without a catalyst, thermal hydrocracking occurs in chain reactions via radicals. The chemistry of hydrocracking naphthenes on bifunctional catalysts resembles that of alkanes. A peculiarity, however, is the pronounced reluctance of cyclic carbenium ions to undergo endocyclic β‐scissions. The effect manifests itself in the so‐called paring reaction, which, in turn, forms the basis for measuring the Spaciousness Index for characterizing the effective pore width of zeolitic catalysts. Hydrocracking on bifunctional catalysts is among the very important processes in modern petroleum refining. It is primarily used for converting heavy oils into diesel and jet fuel. Besides, hydrocracking is appreciated for its pronounced versatility: numerous process variants exist which help to meet specific requirements in refineries or petrochemical plants. Two recent developments are briefly discussed in this review, viz. the conversion of surplus aromatics, e.g., in pyrolysis gasoline, into a synthetic feedstock for steam crackers, and quality enhancement of diesel fuel by selective ring opening of polynuclear aromatics.

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Section: Hydrocracking Of One‐ring Aromatics Into a Synthetic Steamentioning

confidence: 99%

Section: Hydrocracking Of One-ring Aromatics Into a Synthetic Steamcrmentioning

confidence: 99%

Catalytic Hydrocracking—Mechanisms and Versatility of the Process

2012

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“…Hydrogenation is an industrially important reaction that could be carried out using various Ni-based zeolitic materials (such as Ni/ZSM-5). − Furthermore, when the proportion of heteroatoms such as Al, Fe, Ga, and Ni in MFI frameworks is minimal, the thermal and hydrothermal stability is significantly enhanced in comparison with aluminosilicate zeolites. Despite Ni catalysts finding potential industrial applications, it is very important to pinpoint that their activity, selectivity, and stability will highly depend on the way Ni is incorporated on the carrier.…”

Section: Introductionmentioning

confidence: 99%

“…Platinum and palladium noble metal catalysts on various supports are well known and have been extensively studied in hydrogenation reactions. As a more economic option, nickel has also been used; however, for the nickel case, usually large amounts of nickel are impregnated on the supports, compared to the ones deposited on Pd and Pt, being generally attributed to poor dispersion of Ni and lower intrinsic activity per site. − Thus, important quantities of the metal are wasted as they are hidden from the reactants when large particles of metallic nickel are formed upon catalyst activation. Indeed high Ni dispersions can be successfully obtained in zeolites by several approaches, such as precipitation, impregnation, and ion exchange.…”

Section: Introductionmentioning

confidence: 99%

Production of Highly Dispersed Ni within Nickel Silicate Materials with the MFI Structure for the Selective Hydrogenation of Olefins

Sebakhy

Vitale

Pereira‐Almao

2019

Ind. Eng. Chem. Res.

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Aluminum-free Ni-incorporated MFI zeolite materials were synthesized in a batch reactor under mild reaction conditions using the hydrothermal method and were proven to exhibit highly active sites for the saturation of aromatics and olefinic molecules due to the high dispersion of the Ni species. The synthesized solid materials were characterized by various methods, and computational modeling aided in understanding the Ni dispersion in the MFI framework. The novelty of this study is corroborated to the unprecedented hydrogenation activity of the Ni-MFI materials when tested with a 1-octene model molecule at 0.48 MPa H2 pressure and moderate temperatures (423–473 K). Another important aspect of this work is the significant elimination of olefinic molecules from a sulfur-rich industrial cracked naphtha feedstock when using extrudates of the same material, which enforces that Ni-MFI could be commercially applied in industry for the selective hydrogenation of olefins present in light petroleum streams.

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“…Table 2 shows that the impregnation of Ni and Pt metals was successful. Ni metal has a smaller size than Pt metal so that Ni metal can enter more LM pores [35,36].…”

Section: Characterizations Of Catalystsmentioning

confidence: 99%

Highly Selective Bio-hydrocarbon Production using Sidoarjo Mud Based-Catalysts in the Hydrocracking of Waste Palm Cooking Oil

Trisunaryanti

Triyono

Fallah

et al. 2022

Bull. Chem. React. Eng. Catal.

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In this work, Lapindo mud (LM) was used as catalyst support. This is because the Lapindo mud has a high SiO2 content of 45.33 %. This research aims to produce a hydrocracking catalyst based on Lapindo mud through impregnation of Ni and Pt metals as well as grafting amine groups. Ni and Pt metals impregnation using wet impregnation method followed by amine group grafting. The best catalyst in this study was NiPt-NH2/LM which contained Ni and Pt metals, surface area, and pore diameters of 1.68 wt.% and 0.4 wt.%, 6.59 m2/g, 15.51 nm, respectively. The effectiveness of the catalyst was tested against temperature and catalyst: feed ratio. The catalyst with the best activity and selectivity was tested for reusability 3 times through hydrocracking process. The yield of liquid products obtained in the hydrocracking process of WPO using NiPt-NH2/LM catalyst with the optimum temperature and the weight ratio of catalyst:feed at 550 oC was 79.4 wt. % which consists of hydrocarbon compound of 55.9 wt.%. The yield of liquid products obtained in the hydrocracking WPO using the used NiPt-BH2/LM catalyst was 28.4 wt.% which consists of hydrocarbon compound of 23.6 wt.%. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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High Performance Ni Based Catalyst for Toluene Hydrocracking

Cited by 8 publications

References 35 publications

Catalytic Hydrocracking—Mechanisms and Versatility of the Process

Catalytic Hydrocracking—Mechanisms and Versatility of the Process

Production of Highly Dispersed Ni within Nickel Silicate Materials with the MFI Structure for the Selective Hydrogenation of Olefins

Highly Selective Bio-hydrocarbon Production using Sidoarjo Mud Based-Catalysts in the Hydrocracking of Waste Palm Cooking Oil

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