# Behavior of a Two-Phase Gas–Liquid Flow at the Inlet into a Catalytic Reactor

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### Abstract

The behavior of a two-phase flow inside the inlet pipeline of a catalytic reactor is investigated. In addition to the classical approach using familiar flow diagrams, means of computational fluid dynamics are used for three-dimensional modeling of the spatial distribution of phases in the pipeline during operation. Results show a nonuniform distribution of the liquid phase over the over the pipeline outlet cross section surface, plus a mass flow of the liquid phase that is not stable over time. The maximum peak flow rates exceed the average values by ~300%. Compared to data from flow diagrams, CFD modeling shows that a change in the gas flow in the investigated range does not alter the nature of a two-phase flow, but an increase in the gas flow reduces the irregularity of the distribution of the liquid phase over the pipeline outlet cross section. Data on the behavior of a flow are needed to design catalytic reactor structures that ensure the uniform distribution of a two-phase flow to the catalyst bed for, e.g., hydrotreating reactors in the oil refining industry.

## Keywords:

two-phase gas-liquid flow hydrotreating processes two-phase flow pattern maps computational fluid dynamics (CFD) spatial flow distribution## Notes

### FUNDING

This work was performed as a part of the state task for the Boreskov Institute of Catalysis, project no. АААА-А17-117041710077-4.

## REFERENCES

- 1.Wallis, G.B.,
*One-Dimensional Two-Phase Flow,*New York: McGraw-Hill, 1969.Google Scholar - 2.Chisholm, D.,
*Two-Phase Flows in Pipelines and Heat Exchangers,*London: George Godwin, 1983.Google Scholar - 3.Baker, O.,
*Oil Gas J.,*1954, vol. 53, no. 12, pp. 185–195.Google Scholar - 4.Mandhane, J.M., Gregory, G.A., and Aziz, K.,
*Int. J. Multiphase Flow,*1974, vol. 1, no. 4, pp. 537–553.CrossRefGoogle Scholar - 5.Golan, L.P. and Stenning, A.H.,
*Proc.—Inst. Mech. Eng.,*1969, vol. 184, no. 3, pp. 110–116.Google Scholar - 6.Lee, A.-H., Sun, J.-H., and Jepson, W.P., Abstract of Papers,
*Proc. 3rd Int. Offshore Polar Eng. Conf.,*Singapore, 1993, vol. 2, p 159.Google Scholar - 7.Whalley, P.B.,
*Boiling, Condensation, and Gas-Liquid Flow,*Oxford: Clarendon Press, 1987.Google Scholar - 8.Taitel, Y. and Dukler, A.E.,
*AIChE J.,*1976, vol. 22, no. 1, pp. 47–55.CrossRefGoogle Scholar - 9.Oshinowo, T. and Charles, M.E.,
*Can. J. Chem. Eng.,*1974, vol. 52, no. 1, pp. 25–35.CrossRefGoogle Scholar - 10.Pinto del Corral, N., Analysis of Two-Phase Flow Pattern Maps. http://www.energetickeforum.cz/ext/2pf/ maps/Documents/Analysis_of_maps.pdf. Cited October 15, 2018.Google Scholar
- 11.Vargaftik, N.B.,
*Spravochnik po teplofizicheskim svoistvam gazov i zhidkostei*(Handbook on the Thermophysical Properties of Gases and Liquids), Moscow: Nauka, 1972.Google Scholar - 12.ANSYS Official Website, ANSYS FLUENT User’s Guide. https://www.pdfdrive.com/ansys-fluent-users-guide-e6036262.html. Cited July 7, 2019.Google Scholar