Hydrocracking, hydrogenation and isomerization of model biomass tar in a packed bed reactor over bimetallic NiMo zeolite catalysts: Tailoring structure/acidity

Kostyniuk, Andrii; Bajec, David; Likozar, Blaž

doi:10.1016/j.apcata.2021.118004

Cited by 33 publications

(10 citation statements)

References 53 publications

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“…[33][34][35] The Pd/HY catalysts with both abundant mesoporous and suitable acid sites showed superior activities, on which more than 99 % naphthalene was converted. [7] The formation of decalin was greatly facilitated on the Pd/HY-a catalyst due to its increased amount of mesoporous. Specifically, the TOF for generating decalin on Pd/HY-a (31.62 h À 1 ) was 3.26 times of that on Pd/HY-b (9.69 h À 1 ).…”

Section: Catalystmentioning

confidence: 99%

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Deep Hydrogenation Saturation of Naphthalene Facilitated by Enhanced Adsorption of the Reactants on Micro‐Mesoporous Pd/HY

Wang

Zhang

et al. 2021

ChemistrySelect

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Deep hydrogenation saturation of polycyclic aromatic hydrocarbons is of great importance for the production of valuable chemical products, but is hard due to the presence of hardly broken π bond. In this work, micro-mesoporous HY supported Pd catalysts (Pd/HY-a) have been prepared by a simple impregnation method following alkali treatment of pristine HY zeolite, which exhibited superior performance for the deep hydrogenation saturation of naphthalene. Pd/HY-a was systematically characterized and compared with the Pd catalysts supported on pristine HY, ZSM-5, SBA-15, and Al 2 O 3 . In Pd/HY-a, abundant mesoporous pore channels together with suitable B acid sites greatly facilitate the adsorption of the reactants (naphthalene and tetralin) and properly tune the electron state of loaded Pd. Therefore, efficient deep hydrogenation saturation of naphthalene has been achieved on Pd/HY-a. Moreover, the kinetic behaviors of naphthalene hydrogenation on Pd/HYa were preliminarily investigated, in which the first-order kinetic model fitted the experimental data well in the early reaction stage.

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Section: Catalystmentioning

confidence: 99%

“…Many catalysts using non-noble metals were developed for naphthalene hydrogenation, [7][8] which were easily prepared and cheap. But high temperature and pressure were required to completely convert naphthalene to decalin.…”

Section: Introductionmentioning

confidence: 99%

Deep Hydrogenation Saturation of Naphthalene Facilitated by Enhanced Adsorption of the Reactants on Micro‐Mesoporous Pd/HY

Wang

Zhang

et al. 2021

ChemistrySelect

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“…According to the previously conducted study by our group by Kostyniu et al, pyridine-DRIFTS analyses of H-BEA (28) catalyst demonstrated the presence of both Lewis and Brønsted acid sites with a B/L ratio of 1.2. 42 Brønsted acid sites in the H-BEA zeolite originate from the bridging of Al 4+ and the silanol group (Si-OH-Al), while the external-framework of Al-oxide and/or octahedral Al atoms are usually the source of Lewis acidity. [43][44][45][46][47] The acid properties of the H-BEA zeolite are summarized below in Table 2.…”

Section: Resultsmentioning

confidence: 99%

Aqueous conversion of monosaccharides to furans: were we wrong all along to use catalysts?

2022

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“…Hydrocracking of eight aromatic hydrocarbons displayed the lowest BTX yield in the absence of the catalyst and the highest yield in the presence of USY zeolite. Furthermore, hydrocracking of tetralin as biomass tar model compounds to benzene, toluene, and xylenes over zeolites was performed under ambient conditions [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Hydrocracking of Di-and Triaromatic Hydrocarbons to Monoaromatics over Mixed Bi-functional Catalysts

Mettu¹,

Loke²,

Patil³

et al. 2022

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In this study, we present selective hydrocracking of poly (di and tri) aromatic compounds to monoaromatics, such as benzene, toluene, and xylenes (BTX), over a mixture of Pt/Al2O3 and Y zeolites. The polyaromatic compounds feed is a combined simulated model feed, which is similar to light cycle oil (LCO) in composition. The feed is processed in a fixed bed reactor over a catalyst mixture: in the first step, selective hydrogenation of di and tri-aromatic compounds occurs in the presence of Pt/Al2O3 catalyst, followed by conversion of selective hydrocracking of partial hydrogenated polyaromatic hydrocarbons into BTX-rich stream over Y zeolite. The structural properties and Pt dispersion of Pt/Al2O3 were studied by X-ray powder diffraction (XRD) and high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). The acidity of Y zeolite with different SiO2/Al2O3 ratios (SAR) was studied by temperature-programmed desorption of NH3 (NH3-TPD). In addition, the textural properties of catalysts were determined using the N2 adsorption and desorption method. Different parameters such as the effect of temperature, effect of weight hourly space velocity (WHSV), different SAR of Y zeolite, Pt/Al2O3, and Y zeolite wt% ratios, and paraffin concentration were investigated. The maximum BTX yield of ~28 wt.% was obtained at 450°C, WHSV-0.7 h-1, H2 pressure 60 bar, Pt/Al2O3, and Y zeolite ratios of 1:2 (wt%) at Y zeolite SAR of 80. These results suggest that the yield of BTX strongly depends on the hydrogenation function (Pt/Al2O3) and acidity function of Y zeolite. Furthermore, the concentration of paraffin plays a key role in the conversion of diaromatics and triaromatics and desired products of BTX formation.

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Hydrocracking, hydrogenation and isomerization of model biomass tar in a packed bed reactor over bimetallic NiMo zeolite catalysts: Tailoring structure/acidity

Cited by 33 publications

References 53 publications

Deep Hydrogenation Saturation of Naphthalene Facilitated by Enhanced Adsorption of the Reactants on Micro‐Mesoporous Pd/HY

Deep Hydrogenation Saturation of Naphthalene Facilitated by Enhanced Adsorption of the Reactants on Micro‐Mesoporous Pd/HY

Aqueous conversion of monosaccharides to furans: were we wrong all along to use catalysts?

Hydrocracking of Di-and Triaromatic Hydrocarbons to Monoaromatics over Mixed Bi-functional Catalysts

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