Influence of diesel fraction feed rate on silicon removal by the protective layer catalyst

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Дәйексөз келтіру

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Рұқсат жабық Тек жазылушылар үшін

Аннотация

The influence of diesel fuel feed rate on silicon adsorption on NiMo/Al2O3-protecting layer catalyst during hydrotreating was studied. Straight-run diesel fraction containing decamethylcyclopentasiloxane additive in the amount of 200 million–1 as an additional source of silicon was used as a feedstock Three series of experiments of 60 hours duration each were carried out at specific feed rates equal to 0.75, 1.5 and 3.0 h–1. It was found that as the specific feed rate increases, the silicon content in the protective layer catalyst increases. To evaluate the efficiency of the adsorption process, the silicon recovery factor was used, which is equal to the ratio of the amount of adsorbed (extracted from the feedstock) silicon to the supplied during the time of the experiment. In the rate range of 0.75–3.0 h–1 , the silicon recovery factor decreased from 0.93 to 0.61 due to more intensive filling of active centers on the catalyst surface. The influence of external mass transfer on the silicon adsorption process was evaluated.

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Рұқсат жабық

Авторлар туралы

R. Petrov

Boreskov Institute of Catalysis of the Siberian Branch of the RAS

Хат алмасуға жауапты Автор.
Email: petrov@catalysis.ru
Ресей, Novosibirsk

S. Reshetnikov

Boreskov Institute of Catalysis of the Siberian Branch of the RAS

Email: petrov@catalysis.ru
Ресей, Novosibirsk

P. Dick

Boreskov Institute of Catalysis of the Siberian Branch of the RAS

Email: petrov@catalysis.ru
Ресей, Novosibirsk

I. Golubev

Boreskov Institute of Catalysis of the Siberian Branch of the RAS

Email: petrov@catalysis.ru
Ресей, Novosibirsk

A. Noskov

Boreskov Institute of Catalysis of the Siberian Branch of the RAS

Email: petrov@catalysis.ru
Ресей, Novosibirsk

Әдебиет тізімі

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2. Fig. 1. Schematic diagram of the reactor.

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3. Fig. 2. Catalyst granule (trefoil).

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4. Fig. 3. Dependence of silicon content in layers (zones) of CSi.S catalyst along the reactor height on the specific volumetric feed rate of LHSV: 1 – layer 1; 2 – layer 2; 3 – layer 3; 4 – layer 4; 5 – layer 5.

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5. Fig. 4. Dependence of catalyst textural characteristics on silicon content in the catalyst: 1 – specific surface area of the catalyst s; 2 – total pore volume of the catalyst ε.

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6. Fig. 5. Dependence of total silicon content in CSi.S catalyst layer on the specific volumetric feed rate of LHSV. Experimental conditions: T = 340°C, CSi.L0 = 200 ppm, 60-hour run.

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7. Fig. 6. Dependence of the mass of silicon passed through and adsorbed over 60 hours on the specific volumetric feed rate of the raw material: 1 – mass of passed silicon; 2 – mass of adsorbed silicon.

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8. Fig. 7. Dependence of the silicon extraction coefficient on the specific volumetric feed rate of the raw material. Experimental conditions: T = 340°C, CSi.L0 = 200 ppm, 60-hour run.

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