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Experimental study on CO2 mass transfer in blade unit of tridimensional rotational flow sieve tray

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  • NSTL
  • Elsevier
The mass transfer performance of CO2 is an index for the design of CO2 capture equipment. In this study, the mass transfer characteristics of CO2 in the blade unit of a tridimensional rotational flow sieve tray (TRST) were investigated using a CO2-NaOH system. The rotational and perforated flow modes were separated experimentally, and the rotational flow ratio of the gas phase at the outlets was controlled such that the flow characteristics of the blade unit were similar to those of the TRST. The effects of the gas-phase artificial rotational flow ratio (R-ctrl), gas-phase F-factor (F-s), and liquid spray density (L-w) on the overall volumetric mass transfer coefficients of the rotational and perforated flows ([K(G)a(v)](rot), [K(G)a(v)](per)), as well as the overall volumetric mass transfer coefficient of the total process [K(G)a(v)](tot)), were investigated. The results showed that under the experimental conditions, [K(G)a(v)](rot) increased with R-ctrl and L-w. F-s did not significantly affect [K(G)a(v)](per), whereas [K(G)a(v)](per) increased with L-w, reaching a maximum value of 0.00194 kmol/(m(3)center dot s center dot kPa). The mass transfer processes of the two flow modes are complementary. When R-ctrl is 0.5, [K(G)a(v)](tot) is optimal at 0.0023 kmol/(m(3)center dot s center dot kPa). This study lays a theoretical foundation for the optimal design of TRSTs.

CO2 captureTridimensional rotational flow sieve trayMass transferRotational-perforated flowsOverall volumetric mass transfer coefficientsABSORPTION SYSTEMAMMONIA SOLUTIONCFD SIMULATIONPRESSURE-DROPEFFICIENCYENHANCEMENTPERFORMANCECAPTURECOLUMN

Wang, Hongkai、Tang, Meng、Dai, Shijie、Zhang, Shaofeng、Liu, Yan、Wang, Dewu、Wang, Ruojin

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Hebei Univ Technol

2022

10.1016/j.seppur.2021.119891

Separation and Purification Technology

Separation and Purification Technology

EISCI
ISSN：1383-5866
年,卷(期)：2022.281
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