Selective hydrodesulfurization of FCC naphtha over carbon coated alumina supported CoMoS catalysts

Kazakova, Mariya A.; Salomatina, Anna A.; Pereyma, Vasily Yu.; Prosvirin, Igor P.; Ishchenko, Arcady V.; Klimov, Oleg V.; Noskov, Aleksandr S.; Kazakov, Maxim O.

doi:10.1016/j.fuel.2023.129394

Cited by 10 publications

(3 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Photoelectron spectra of the C@Al 2 O 3 - x supports and CoMoS catalysts were recorded using a SPECS system (AlKα radiation, h ν = 1486.6 eV, 200 W radiation power) equipped with a hemispherical PHOIBOS-150 MCD-9 analyzer. The procedure is described in more detail in refs and . The C 1s peak with binding energy of 284.5 eV was used as an internal reference for the correct calibration of C 1s spectra.…”

Section: Methodsmentioning

confidence: 99%

“…At the first stage of carbon coated alumina (C@Al 2 O 3 ) composite supports preparation, a sample of the initial alumina was prepared by molding commercial boehmite powder (HQ102B, Hebei Easttree Industrial Co.) using ammonia for peptization (NH 3 /Al 2 O 3 = 0.09 mol/mol). , The molded material was dried at 110 °C (2 h) and calcined at 550 °C (4 h). Then, the calcined alumina sample was crushed and sieved into 0.25–0.5 mm particles.…”

Section: Methodsmentioning

confidence: 99%

“…Another way to obtain carbon–alumina composite supports is to form a carbon coating on the Al 2 O 3 surface by chemical vapor deposition (CVD) of various compounds. Regarding support for hydrotreating catalysts, the literature provides examples of the use of such compounds as methane, ethylene, , and cyclohexene as a carbon source. It has been shown that using a one-stage CVD approach, the surface of commercially available alumina samples with a given granule shape and required mechanical strength can be modified with a layer of carbon deposit.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sorbitol Derived Carbon Coated Alumina Composite as a Promising Support for CoMoS Hydrotreating Catalyst

Kazakova,

Parfenov,

Golubtsov

et al. 2024

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

The beneficial impact of carbon coated alumina (C@Al 2 O 3 ) implemented as support for the CoMoS hydrotreating catalyst has been demonstrated. A series of C@Al 2 O 3 supports with varying carbon contents were obtained by pyrolysis of sorbitol preliminarily impregnated in alumina from an aqueous solution. It was found that carbon coating positively affects the formation of the high-active CoMoS phase. However, control of the carbon content from 2.3 to 11.3 wt % is essential to maintain the sulfide particles dispersion and textural properties. CoMoS/C@Al 2 O 3 catalysts demonstrated superior hydrodesulfurization activity compared with CoMoS/Al 2 O 3 . The hydrodenitrogenation activity of most CoMoS/C@Al 2 O 3 samples is similar to CoMoS/Al 2 O 3 but decreases when the carbon content in the support exceeds 11.3 wt %. The determining factor in improving the CoMoS/C@Al 2 O 3 hydrodesulfurization activity is the formation of defective graphene fragments, which partially cover the alumina surface and help to reduce the support acidity and, therefore, metal−support interaction while maintaining the textural characteristics.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%