Laboratory and pilot plant fixed-bed reactors for Fischer–Tropsch synthesis: Mathematical modeling and experimental investigation

Ermolaev, V. S.; Gryaznov, K. O.; Митберг, Э. Б.; Мордкович, В. З.; Tret’yakov, V. F.

doi:10.1016/j.ces.2015.07.036

Cited by 31 publications

(18 citation statements)

References 20 publications

(25 reference statements)

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“…In the calculations we used the values of chemical synthesis kinetics constants borrowed from [32]. The calculation is carried out without taking into account liquid products: this is the so-called "dry catalyst" approximation.…”

Section: Calculation Resultsmentioning

confidence: 99%

Mathematical model of Fischer-Tropsch catalyst pellet with pointed centers of synthesis

Деревич

Fokina

2017

J. Phys.: Conf. Ser.

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Abstract. The productivity of Fischer-Tropsch reactors is determined by the efficiency of heat and mass transfer processes inside the catalyst pellets. To reduce the diffusion resistance, the pellet base is made porous. The porous structure of the granules causes a discrete arrangement of cobalt metallic microparticles whose size can reach tens of microns. The distance between these active centres significantly exceeds their characteristic size and the homogeneous catalyst model is incorrect. A mathematical model of heat and mass transfer processes inside a porous spherical pellet with localised active centres is proposed. The heat of the exothermic synthesis reaction is removed from the surface of the granule to the synthesis gas stream washing the catalyst pellet by heat transfer. The components of the synthesis gas enter the granule surface as a result of mass transfer. On the basis of the self-consistent field method, the values of the temperature and concentration of the synthesis gas components at the active centres were determined. It is shown that there is a critical temperature of the synthesis gas washing the granule, exceeding critical temperature leads to a substantial overheating of the active centres. In this case, the surface of the catalyst pellet is superheated slightly. The principal difference between the homogeneous and heterogeneous models in catalytic reactions is discussed.

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Section: Calculation Resultsmentioning

confidence: 99%

Mathematical model of Fischer-Tropsch catalyst pellet with pointed centers of synthesis

Деревич

Fokina

2017

J. Phys.: Conf. Ser.

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“…are the same as those presented in Eqs (1). and(2). Furthermore, it is proposed by the author to express the boundary condition at the edges of the PEV (i.e.of the derivative of the dependent variable, similarly to the properties of quasiperiodic fields (Eq.…”

mentioning

confidence: 93%

“…Transport phenomena in porous media are encountered in various chemical engineering systems of practical interest, such as CO 2 adsorbers [1], Fischer-Tropsch reactors [2] or packed bed reactors for steam reforming [3]. However, modeling transport phenomena at the microscopic scale in an entire porous medium is often difficult due to the tremendous amount of information that have to be considered.…”

Section: Introductionmentioning

confidence: 99%

The method of quasiperiodic fields for diffusion in periodic porous media

Mathieu-Potvin

2016

Chemical Engineering Journal

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“…Fischer-Tropsch catalytic activity was tested in a fixed bed microreactor having a length of 10 cm with a diameter of 3.3 cm. One g of freshly prepared catalyst was loaded into the reactor along with 5 g of ceramic balls as diluting material [17,18]. The inert ceramic balls having no effect on the activity and selectivity of the catalyst; were used for increasing the surface area of the catalyst.…”

Section: Catalyst Testingmentioning

confidence: 99%

“…The loaded catalyst was initially reduced at 400 °C for 16 h using hydrogen gas at a flow rate of 50 sccm. The reaction was carried out at 250 °C with hydrogen to carbon monoxide ratio of 2:1 [18,19]. Flow rates were maintained at 50 sccm of hydrogen, 25 sccm of carbon monoxide and 10 sccm of nitrogen.…”

Section: Catalyst Testingmentioning

confidence: 99%

Development of Hydrotalcite Based Cobalt Catalyst by Hydrothermal and Co-precipitation Method for Fischer-Tropsch Synthesis

Shareef

Arslan

Iqbal

et al. 2017

Bull. Chem. React. Eng. Catal.

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This paper presents the effect of a synthesis method for cobalt catalyst supported on hydrotalcite material for Fischer-Tropsch synthesis. The hydrotalcite supported cobalt (HT-Co) catalysts were synthesized by co-precipitation and hydrothermal method. The prepared catalysts were characterized by using various techniques like BET (Brunauer-Emmett-Teller), SEM (Scanning Electron Microscopy), TGA (Thermal Gravimetric Analysis), XRD (X-ray diffraction spectroscopy), and FTIR (Fourier Transform Infrared Spectroscopy). Fixed bed micro reactor was used to test the catalytic activity of prepared catalysts. The catalytic testing results demonstrated the performance of hydrotalcite based cobalt catalyst in Fischer-Tropsch synthesis with high selectivity for liquid products. The effect of synthesis method on the activity and selectivity of catalyst was also discussed.

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Laboratory and pilot plant fixed-bed reactors for Fischer–Tropsch synthesis: Mathematical modeling and experimental investigation

Cited by 31 publications

References 20 publications

Mathematical model of Fischer-Tropsch catalyst pellet with pointed centers of synthesis

Mathematical model of Fischer-Tropsch catalyst pellet with pointed centers of synthesis

The method of quasiperiodic fields for diffusion in periodic porous media

Development of Hydrotalcite Based Cobalt Catalyst by Hydrothermal and Co-precipitation Method for Fischer-Tropsch Synthesis

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