Effect of calcination temperature of alumina supports on the wax hydrocracking performance of Pd-loaded mesoporous alumina xerogel catalysts for the production of middle distillate

Cho, Kyung Min; Park, Sunyoung; Seo, Jeong Gil; Youn, Myung-Joong; Nam, Insung; Baeck, Sung‐Hyeon; Chung, Jin Suk; Jun, Ki‐Won; Song, In Kyu

doi:10.1016/j.cej.2008.10.008

Cited by 33 publications

(24 citation statements)

References 41 publications

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“…As metal sites, not only precious metals such as Pt [8][9][10][11][12][13][14] and Pd [15], but also transition metals such as Ni [16], Ni-Mo [17], Co-Mo [18], Ni-W [19] have been reported. As solid acid catalysts, zeolite [10,12,13,16], amorphous silica-alumina [17,19], and alumina [15,18] have been investigated. Among bifunctional catalysts for hydrocracking of n-alkanes, which are main components of the FT product, Pt-loaded β-type zeolite catalysts exhibited higher product yields under mild conditions [8,10].…”

Section: Introductionmentioning

confidence: 99%

Preparation for Pt-Loaded Zeolite Catalysts Using w/o Microemulsion and Their Hydrocracking Behaviors on Fischer-Tropsch Product

et al. 2015

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Pt-loaded β-type zeolite catalysts with constant Pt content (0.11 wt.%) and similar pore structure were prepared using a water-in-oil (w/o) microemulsion. The effect of Pt particle synthesis conditions using microemulsion (a type of Pt complex-forming agents and the molar ratio of complex-forming agent to Pt 4+ ) on loaded Pt particle size was investigated. The Pt particle size of the Pt catalyst using tetraethylammonium chloride (TEAC) as a complex-forming agent with the molar TEAC/Pt ratio 10 was the minimum value (3.8 nm), and was much smaller than that (6.7 nm) prepared by the impregnation method. The utilization of the complex-forming agent of which hydrophobic groups occupied a small volume and the appropriate complex-forming agent/Pt ratio were favorable for synthesis of small Pt particles. The effect of loaded Pt particle size on the hydrocracking of the Fischer-Tropsch (FT) product was investigated using the Pt-loaded zeolite catalysts at 250 °C with an initial H2 pressure of 0.5 MPa, and reaction time of 1 h. The Pt catalyst with a Pt particle size of 4.2 nm prepared using the microemulsion exhibited the maximum corresponding jet fuel yield (30.0%), which was higher than that of the impregnated catalyst.

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Section: Introductionmentioning

confidence: 99%

Preparation for Pt-Loaded Zeolite Catalysts Using w/o Microemulsion and Their Hydrocracking Behaviors on Fischer-Tropsch Product

et al. 2015

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“…The waxy products of the FTsynthesis are characterized by the absence of sulfur compounds. For this reason, noble metals such as Pt and Pd or PtPd alloys, which would otherwise be poisoned, can be used in hydrocracking catalysts, and provide high selectivity to middle distillate [11][12][13][14][15][16][17][18][19]. Due to the high content of linear paraffins in FT-waxes, the resulting fuels are characterized by a high cetane number (good combustion properties).…”

Section: Introductionmentioning

confidence: 99%

Effect of metal loading on activity, selectivity and deactivation behavior of Pd/silica–alumina catalysts in the hydroconversion of n-hexadecane

et al. 2014

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“…The role and importance of catalysts in the hydrocracking processes has been intensely studied [14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Generally, the hydrocracking catalysts composed of noble metals or transition metals paired with a mesoporous support have dual functions in the reaction process.…”

Section: Introductionmentioning

confidence: 99%

“…The most conventional catalysts are NiW, NiMo, and CoMo bimetallic paired on a number of supports, including zeolite, silica-alumina, and alumina [19][20][21][22]. Recently, Pd-based catalysts have also been widely used due to their high activity on hydrocracking sulfur-free heavy hydrocarbons [24][25][26][27]. Besides the catalyst compositions, it was also found that the selectivity of a catalyst highly depends on the support materials and dispersion of metals in the supports [16,26].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Mesoporous Silica-Supported Palladium Catalysts for Biofuel Upgrade

Ling

Reddy

Hill

et al. 2012

Journal of Nanotechnology

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We report the preparation of two hydrocracking catalysts Pd/CoMoO 4 /silica and Pd/CNTs/CoMoO 4 /silica (CNTs, carbon nanotubes). The structure, morphologies, composition, and thermal stability of catalysts were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, transmission electron microscopy (TEM), energy-dispersive X-ray (EDX), and thermogravimetric analysis (TGA). The catalyst activity was measured in a Parr reactor with camelina fatty acid methyl esters (FAMEs) as the feed. The analysis shows that the palladium nanoparticles have been incorporated onto mesoporous silica in Pd/CoMoO 4 /silica or on the CNTs surface in Pd/CNTs/CoMoO 4 /silica catalysts. The different combinations of metals and supports have selective control cracking on heavy hydrocarbons.

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Effect of calcination temperature of alumina supports on the wax hydrocracking performance of Pd-loaded mesoporous alumina xerogel catalysts for the production of middle distillate

Cited by 33 publications

References 41 publications

Preparation for Pt-Loaded Zeolite Catalysts Using w/o Microemulsion and Their Hydrocracking Behaviors on Fischer-Tropsch Product

Preparation for Pt-Loaded Zeolite Catalysts Using w/o Microemulsion and Their Hydrocracking Behaviors on Fischer-Tropsch Product

Effect of metal loading on activity, selectivity and deactivation behavior of Pd/silica–alumina catalysts in the hydroconversion of n-hexadecane

Preparation of Mesoporous Silica-Supported Palladium Catalysts for Biofuel Upgrade

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