Mathematical modeling of CO2 capture in a semi-dry spouted bed reactor

Haghnegahdar, Mohammad Reza; Hatamipour, Mohammad Sadegh; Rahimi, Amir

doi:10.1016/j.seppur.2011.06.005

Cited by 6 publications

(1 citation statement)

References 38 publications

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“…Extensive numerical simulation of PPSB has been carried out, while only a few simulations were focused on mathematical modeling in a semidry spouted bed reactor. Mathematical modeling of a one-dimensional isothermal model in spouting beds was first proposed by Mathur et al Some mathematical models to analyze the performance capability of a spouted bed in different processes have been explored. − Recently, Fakhari et al experimentally analyzed the simultaneous absorption of CO 2 and SO 2 by a NaOH solution in a PPSB reactor and Niksiar et al established a one-dimensional mathematical model to predict the behavior of the spouted bed reactor in the gasification process of pistachio shell pyrolysis carbon. Tseng et al, on studying the interactions between the flow structure and chemical reaction, numerically simulated a flue gas desulfurization tower with perforated sieve trays by a Eulerian–Eulerian method, along with the implementation of the species transport equations of the chemical reactions in the study.…”

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confidence: 99%

Eulerian–Eulerian Numerical Study of the Flue Gas Desulfurization Process in a Semidry Spouted Bed Reactor

Bai

Kai

et al. 2020

ACS Omega

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The Eulerian–Eulerian two-fluid model (TFM) in conjunction with kinetic theory of granular flows (KTGF) was used for analyzing water vaporization and the semidry flue gas desulfurization process in a two-dimensional powder–particle spouted bed (PPSB). In an environment with high-temperature gas, desulfurization slurry is wrapped on the surface of moving particles and evaporated, along with the application of the user defined function (UDF) method to accomplish water heat and mass transfer by considering evaporation in the simulation process. The simulation results revealed that the best mass- and heat-transfer effect of each phase can be found in the outer annulus and the near spout region, both of which are also the main areas where water vaporization occurs. The rate of desulfurization products decreases with the increase in inlet gas temperature as the water vaporization rate increases. The volume fraction of desulfurization reaction products decreases with the increase in inlet flue gas temperature. Compared with other working conditions, the highest desulfurization efficiency reaches 84% when the inlet flue gas temperature is 480 K. The change of the desulfurization product rate with the radial distance is the same under different superficial gas velocities, with the peak desulfurization efficiency appearing in the annulus. The optimal operating parameter for the desulfurization process is available in PPSB, and the desulfurization efficiency and gas handling capacity reach the best result when the superficial gas velocity equals 1.2 Ums.

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