Zeolite-Supported Ni and Mo Catalysts for Hydrotreatments

Li, Dien; Xu, Huifang; Guthrie, George D.

doi:10.1006/jcat.1999.2723

Cited by 29 publications

(15 citation statements)

References 40 publications

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“…Crystalline zeolites with unique porous structures and modifiable surface properties are widely used in oil and gas processing [32]. For example, metal sulfide clusters (MoS x ) dispersed inside the micropores of zeolite Y and ZSM-5 have high activity in toluene hydrogenation and hydrodesulfurization of dibenzothiophene [33,34]. Nevertheless, conventional zeolites cannot accomplish deep hydrogenation of the polyaromatic hydrocarbons due to their pore size limitation [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Mesoporous zeolite-supported metal sulfide catalysts with high activities in the deep hydrogenation of phenanthrene

Zhang

et al. 2015

Journal of Catalysis

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Section: Introductionmentioning

confidence: 99%

Mesoporous zeolite-supported metal sulfide catalysts with high activities in the deep hydrogenation of phenanthrene

Zhang

et al. 2015

Journal of Catalysis

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“…The materials used in this research were: active Zeolite of 100 mesh size, demineralised water, HF 1%, HCl 1M, NaOH 2M, NH 4…”

Section: Methodsmentioning

confidence: 99%

Synthesis of Catalyst Cobalt Impregnated on Activated Natural Zeolite, Co/ANZ

Dewi¹,

Fanani²

2017

ijfac

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Research has been done on the synthesis of catalyst Co/Activated Natural Zeolite. The variables studied were the mass ratio of Cobalt to Zeolite and temperature of reduction during catalyst activation. The catalyst produced were analysed in their acidity and surface area. Acidity was presented in the form of ammonia and pyridine adsorption on the catalyst surface. The results showed the increasing Cobalt to Zeolite mass ratio will increase acidity of the catalyst produced. Reduction temperature during catalyst activation also gave same effect as Cobalt to Zeolite mass ratio did. Best ratio within the range of this study was Cobalt to Zeolite mass ratio of 6:20, which was found at reduction temperature of 400 C. This ratio gave catalyst acidity correspond to ammonia adsorption of 6.4615 mmol/g, and to pyridine adsorption of 2.6047 mmol/g catalyst. The best reduction temperature was 450 C at ratio of 6:20. The acidity of this catalyst was of 7.5202 mmol/g as in ammonia adsorption, and was of 3.662 mmol/g as in pyridine adsorption. Catalyst surface area of the best ratio was 32.63 m2/g, whilst catalyst surface area of the best reduction temperature was 38.95 m2/g.

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“…Unlike noble metal catalysts, the loading of transition metals onto the zeolite increased the amount of Brönsted acid sites [7,24,25,26]. However, the additional acid sites did not contribute to the catalyzed HC of tetralin species.…”

Section: The Evaluation Of the Reaction Performances Of Catalystsmentioning

confidence: 95%

Hydro-conversion of 1-methyl naphthalene into (alkyl)benzenes over alumina-coated USY zeolite-supported NiMoS catalysts

Park

Lee

Miyawaki

et al. 2011

Fuel

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Hydro-conversion reactions were carried out at 360°C under 5 MPa of H 2 pressure to study ring-opening reactions of 1-methyl naphthalene using NiMoS supported on γ-alumina and alumina-coated/mixed USY zeolites. The catalysts were characterized using N 2-BET, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), pyridine FT-IR, and high-resolution transmission electron microscopy (HRTEM) to study the influence of morphological and acidic properties on hydrogenation (HYD) and hydrocracking (HC) reactions. NMACZ-2 (NiMoS supported on the minimum amount of alumina-coated USY zeolite) showed enhanced reactivity for HC and produced (alkyl)benzenes with the highest yield, of ca. 80%. By-products were tetralin, decalin and cyclo-paraffin species. The tetralin species produced using NMACZ-2 moved into the alumina-coated USY zeolite support before undergoing HYD to produce decalin species, which were rapidly and selectively hydro-cracked into (alkyl)benzenes. A large amount of decalin was produced through the HYD of tetralin without significant cracking, possibly due to the weak acid character of γ-alumina. Bulk-phase Mo oxide species on NMAZ (physical mixture of alumina and USY zeolite), as well as deactivation of the catalysts due to coke formation over the naked zeolite surface, inhibited the ring opening of tetralin, decreasing the yield of (alkyl) benzene. 3 Various morphologies, such as the MoS 2 structure and acidic characteristics of the catalysts, were crucial factors affecting the HC reactivity of 1-methyl naphthalene.

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Zeolite-Supported Ni and Mo Catalysts for Hydrotreatments

Cited by 29 publications

References 40 publications

Mesoporous zeolite-supported metal sulfide catalysts with high activities in the deep hydrogenation of phenanthrene

Mesoporous zeolite-supported metal sulfide catalysts with high activities in the deep hydrogenation of phenanthrene

Synthesis of Catalyst Cobalt Impregnated on Activated Natural Zeolite, Co/ANZ

Hydro-conversion of 1-methyl naphthalene into (alkyl)benzenes over alumina-coated USY zeolite-supported NiMoS catalysts

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