Hydrocracking and Hydroisomerization of n-Hexadecane, n-Octacosane and Fischer–Tropsch Wax Over a Pt/SiO2–Al2O3 Catalyst

Kang, Jungshik; Ma, Wanhong; Keogh, Robert A.; Shafer, Wilson D.; Jacobs, Gary; Davis, Burtron H.

doi:10.1007/s10562-012-0910-5

Cited by 28 publications

(36 citation statements)

References 20 publications

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“…The lower reactivity of the n-C 18+ paraffin blend is more noteworthy, as the relative conversion of n-paraffins within the mixed feeds greatly favors the conversion of hydrocarbons with a higher carbon number, i.e., the kinetic rate constants should increase with the chain length of the paraffins. 6,28 Therefore, the lower This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.…”

Section: Studies On Catalyst Stabilitymentioning

confidence: 99%

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Hydroisomerization of long-chain paraffins over nano-sized bimetallic Pt–Pd/H-beta catalysts

Bauer

Ficht

Bertmer

et al. 2014

Catal. Sci. Technol.

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Section: Studies On Catalyst Stabilitymentioning

confidence: 99%

“…diffusivity and/or sorption rate rather than the vapor-liquid equilibrium 6 are assumed to explain the lower conversion of the n-C 18+ paraffin blend.…”

Section: View Article Onlinementioning

confidence: 99%

Hydroisomerization of long-chain paraffins over nano-sized bimetallic Pt–Pd/H-beta catalysts

Bauer

Ficht

Bertmer

et al. 2014

Catal. Sci. Technol.

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“…One is that the intrinsic activity of the noble metal Pt is higher than the NiMo catalyst [41]. Another reason could be the dependence of hydrocarbon reactivity on chain length, with it increasing significantly with chain length up to C 33 [23,[42][43][44]. The wax feed produced from cobalt catalyzed FTS has an average carbon number of C 30 -C 31 ; as such, higher conversion is expected relative to the case of pure C 28 hydrocarbon feed.…”

Section: Isoparaffin Content Versus Carbon Numbermentioning

confidence: 99%

Hydrocracking of Octacosane and Cobalt Fischer–Tropsch Wax over Nonsulfided NiMo and Pt-Based Catalysts

Kang

Jacobs

et al. 2021

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The effect of activation environment (N2, H2 and H2S/H2) on the hydrocracking performance of a NiMo/Al catalyst was studied at 380 °C and 3.5 MPa using octacosane (C28). The catalyst physical structure and acidity were characterized by BET, XRD, SEM-EDX and FTIR techniques. The N2 activation generated more active nonsulfided NiMo/Al catalyst relative to the H2 or H2S activation (XC28, 70–80% versus 6–10%). For a comparison, a NiMo/Si-Al catalyst was also tested after normal H2 activation and showed higher activity at the same process conditions (XC28, 81–99%). The high activity of the NiMo/Al (N2 activation) and NiMo/Si-Al catalysts was mainly ascribed to a higher number of Brønsted acid sites (BAS) on the catalysts. The hydrocracking of cobalt wax using Pt/Si-Al and Pt/Al catalysts confirmed the superior activity of the Si-Al support. A double-peak product distribution occurred at C4–C6 and C10–C16 on all catalysts, which illustrates secondary hydrocracking and faster hydrocracking at the middle of the chain. The nonsulfided NiMo/Al and Pt/Al catalysts, and NiMo/Si-Al catalyst produced predominantly diesel (sel. 50–70%) and gasoline range (sel. > 50%) hydrocarbons, respectively, accompanied by some CH4 and light hydrocarbons C2–C4. On the other hand, the hydrocarbon distribution of the Pt/Si-Al varied with conditions (i.e., diesel sel. 87–90% below 290 °C or gasoline sel. 60–70% above 290 °C accompanied by little CH4) The dependence of the isomer/paraffin ratio on chain length was studied as well. The peak iso/paraffin value was observed at C10–C13 for the SiAl catalyst.

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“…Regardless of the exact unit setup, there is a substantial fraction of the product which requires further processing to be used as fuel. Typical upgrading processes of FT waxes involve fluidized-bed catalytic cracking (FCC) [7][8][9] or hydrocracking [10,11] followed by further refining to produce naphtha and diesel fuel.…”

Section: Introductionmentioning

confidence: 99%

Fischer‐Tropsch Wax from Renewable Resources as an Excellent Feedstock for the Steam‐Cracking Process

et al. 2020

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A heavy side‐product of the Fischer‐Tropsch (FT) process called waxes are potential renewable feedstocks for the steam‐cracking process. Samples of FT wax and distillation cuts thereof were investigated using laboratory pyrolysis in order to compare their pyrolysis performance with traditional steam‐cracking feedstocks, i.e., primary naphtha and hydrocracking products. At 815 °C, waxes provided significantly higher yields of the desired products ethylene and propylene, and lower yields of oil compared to traditional feedstocks. The yields of waxes blended in traditional feedstocks and the sensitivity of cracking product yields to temperature and residence time were also examined experimentally.

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Hydrocracking and Hydroisomerization of n-Hexadecane, n-Octacosane and Fischer–Tropsch Wax Over a Pt/SiO2–Al2O3 Catalyst

Cited by 28 publications

References 20 publications

Hydroisomerization of long-chain paraffins over nano-sized bimetallic Pt–Pd/H-beta catalysts

Hydroisomerization of long-chain paraffins over nano-sized bimetallic Pt–Pd/H-beta catalysts

Hydrocracking of Octacosane and Cobalt Fischer–Tropsch Wax over Nonsulfided NiMo and Pt-Based Catalysts

Fischer‐Tropsch Wax from Renewable Resources as an Excellent Feedstock for the Steam‐Cracking Process

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