Selective ring opening of methylcyclohexane and decalin over Rh–Pd supported catalysts: Effect of the preparation method

D'ippolito, Silvana Andrea; Especel, Catherine; Epron, Florence; Pieck, C.L.

doi:10.1016/j.fuproc.2015.08.027

Cited by 13 publications

(7 citation statements)

References 42 publications

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“…The effect of Al 2 O 3 and SiO 2 -Al 2 O 3 support was reported by on the activity of Rh-Pd catalyst for the conversion of decalin at 350°C and 3 MPa. 67 The gasoline conversion of the decalin and the selectivity of the ring opening products were increased using the SiO 2 -Al 2 O 3 support (Rh-Pd/SiO 2 -Al 2 O 3 ) to ~45.9% and ~55.8% respectively compared with ~19.3% conversion and ~5.4% selectivity over the Rh-Pd/Al 2 O 3 catalyst. This signifies that promoting the acidity of a catalyst produces better activity.…”

Section: -53mentioning

confidence: 99%

Catalytic Hydrogenation of Hydrocarbons for Gasoline Production

Garba¹,

Galadima²

2018

JPS

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Section: -53mentioning

confidence: 99%

Catalytic Hydrogenation of Hydrocarbons for Gasoline Production

Garba¹,

Galadima²

2018

JPS

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“…However, the distribution of the derived compounds may be significantly influenced by the acidity of the support. Additionally, the silica‐alumina combination has Brönsted acid sites that may be advantageous for hydrocracking processes, raising the quality of the final product [12] . The big pore size and high surface area of the support allow the bulky feed molecules to interact with the active sites inside the pores.…”

Section: Introductionmentioning

confidence: 99%

Selective Single‐step Co‐hydroprocessing of Light Cycle Oil and Waste Cooking Oil Mixtures for Diesel Fuel Production

Verma,

Mishra,

Khan

et al. 2023

ChemistrySelect

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This study investigates the co‐hydroprocessing of light cycle oil (LCO) with waste cooking oil (WCO) as a potential strategy to enhance LCO′s qualities and overall performance. The study involves the integration of LCO with WCO in three different ratios, facilitating a combined hydrotreatment process within a fixed bed continuous down‐flow reactor. The findings reveal that incorporating WCO into LCO hydrotreatment enhances LCO′s properties, albeit with a minor reduction in hydrodesulfurization efficacy. WCO demonstrates approximately 10.7 % density and 26 % cetane number improvements compared to the LCO/WCO (70/30) blend at 380 °C. The most significant reduction in di and poly‐aromatic compounds is observed at 340 °C for pure LCO, while WCO inclusion has minimal impact on poly‐aromatic saturation. The yield range for medium distillates across all products is between 87 % and 93 %. The time‐on‐stream study suggests excellent catalyst stability and activity up to 456 h, which is one of the highest lifetimes reported so far. TGA study of the spent catalyst indicates 22 wt % coke deposition complemented by TEM results. FTIR analysis revealed absorptions of alicyclic hydrocarbons‐type compounds deposited over the catalyst surface. This research contributes to the development of innovative catalysts for selectively converting LCO and WCO into diesel‐range hydrocarbons through single‐step process.

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“…The latter usually contain two noble metals in different ratios on oxide or zeolite supports. The most commonly used pairs are Ir–Pt, − Rh–Pd, − or Ru–Pt …”

Section: Introductionmentioning

confidence: 99%

Decalin Ring Opening on Heterogeneous Me/Saponite Nanocatalysts (Me = Rh, Ru, and Ir)

Финашина

Avaev

Ткаченко

et al. 2021

Ind. Eng. Chem. Res.

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Heterogeneous nanocatalysts containing metal nanoparticles (Me = Ir, Rh, and Ru) deposited on mesoporous saponite (magnesium aluminosilicate) were prepared from metal chlorides by the incipient wetness impregnation method and tested in the ring-opening reaction at high pressures using decalin as a substrate. The elemental composition of the catalysts and the carrier, the surface area, pore size and pore volume, the charge state, the size of metal nanoparticles, and the acidity were characterized by the following methods: scanning electron microscopy with energy-dispersive X-ray analysis, nitrogen adsorption–desorption analysis, Fourier-transform infrared spectroscopy, diffuse-reflectance Fourier-transform infrared spectroscopy, transmission electron microscopy, CO chemisorption, X-ray photoelectron spectroscopy, and X-ray diffraction analysis. It was shown that the structure of the carrier and the mesopore system were preserved after metal deposition. Metal particles have an extremely small size and high dispersion. The carrier has a small number of Brønsted acid sites (BAS), which decreases when the metal is supported. The highest BAS/LAS (Lewis acid sites) ratio is determined for the Rh/saponite catalyst. It was found that the activity, selectivity, and product composition were mostly affected by the metal nature. The Ir/saponite catalyst provides a selectivity of about 90% for the ring-opening products, both full and partial ring opening, at the total decalin conversion of about 80%. Over the Rh/saponite catalyst, up to 30% of the bicyclic products of the skeletal isomerization of decalin are formed along with the ring-opening products (mainly partial). The formation of a large number of C1–C9 hydrocracking products is observed over the Ru/saponite catalyst, besides the ring-opening products. Changes in the activity and selectivity of the catalysts with the variation of the main reaction parameters (T, P, WHSV, H2/C10 M ratio, and decalin partial pressure) were also determined.

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Selective ring opening of methylcyclohexane and decalin over Rh–Pd supported catalysts: Effect of the preparation method

Cited by 13 publications

References 42 publications

Catalytic Hydrogenation of Hydrocarbons for Gasoline Production

Catalytic Hydrogenation of Hydrocarbons for Gasoline Production

Selective Single‐step Co‐hydroprocessing of Light Cycle Oil and Waste Cooking Oil Mixtures for Diesel Fuel Production

Decalin Ring Opening on Heterogeneous Me/Saponite Nanocatalysts (Me = Rh, Ru, and Ir)

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