Research on Carbon Dioxide Capture and Mass Transfer in Hydro-Jet Cyclone

Abstract

Steel smelting has a large amount of flue gas emissions and high carbon capture costs, making it one of the "heavy disaster areas" for carbon dioxide (CO2) emissions. This article develops a hydro-jet cyclone (HJC) by coupling the gas phase swirling flow field with the liquid phase jet flow field, and proposes a carbon capture technology for smelting flue gas. During the dispersion process of liquid phase microelements, there was simultaneous rotation and revolution of droplets, which enhances the gas-liquid mass transfer process. The surface renewal effect increases the effective specific interface area, and the interface oscillation effect was beneficial for reducing the mass transfer resistance on the liquid side. A model for the effective phase interface area (ae) of HJC was first proposed for different jet hole, with a maximum ae of 5358.95 m2·m-3.In the CO2-NaOH system, the absorption efficiency of CO2 was 88.9%. This article supplements HJC's research on carbon capture and gas-liquid mass transfer by optimizing the size of the jet hole, which was beneficial for the development of efficient carbon capture equipment in the steel industry and further promotes the sustainable development of the steel industry.

Keywords: CO2 capture, hydro-jet cyclone, CFD, effective phase interface area, jet hole