Study on CO2 absorption by novel choline chloride-diethylenetriamine-water deep eutectic solvents in a rotor-stator reactor

Selective Absorption of HCl from a Gas Mixture with CO2 by Alkali Solution in a Rotor–Stator Reactor

“…At its core is the rotor, which disperses the liquid phase into droplets, liquid filaments, and liquid films through high-speed rotation. 11 This mechanism significantly enhances the gas−liquid contact area and the mass-transfer coefficient. Consequently, high-gravity technology has demonstrated efficacy in treating pollutants in effluents and gases, including off-gases containing SO 2 , CO 2 , NO X , and nitrobenzene wastewater, as well as coal gasification wastewater.…”

“…The RSR exhibits several advantages: (1) With its distinctive rotor and stator internals, the RSR demonstrates an outstanding selfcleaning effect; (2) the RSR features a straightforward structure and ease of operation, leading to reduced operating costs; (3) RSR has better gas-side mass-transfer performance and micromixing efficiency than RPB; (4) in comparison to traditional devices, the RSR offers the benefit of a compact size, contributing to a reduction in equipment investment. 11,20,21 Therefore, the RSRs have been applied to CO 2 absorption, nanomaterial preparation, and so forth. 11,22 This study presents an approach for the selective absorption of HCl using RSR to address the issue of excessive alkali consumption by CO 2 during the treatment of off-gas containing HCl and CO 2 in conventional columns.…”

“…High-gravity technology serves as an effective process intensification method. At its core is the rotor, which disperses the liquid phase into droplets, liquid filaments, and liquid films through high-speed rotation . This mechanism significantly enhances the gas–liquid contact area and the mass-transfer coefficient.…”

“…This mechanism significantly enhances the gas–liquid contact area and the mass-transfer coefficient. Consequently, high-gravity technology has demonstrated efficacy in treating pollutants in effluents and gases, including off-gases containing SO 2 , CO 2 , NO X , and nitrobenzene wastewater, as well as coal gasification wastewater. − In addition, the high-gravity device is distinguished by a short residence time, providing it with an advantage in selective absorption processes. Notably, selective absorption of H 2 S from CO 2 has been achieved by minimizing CO 2 absorption in the high-gravity device. , …”

“…The rotor–stator reactor (RSR) is an innovative high-gravity device, primarily composed of concentric rotor-rings and stator-rings arranged alternately in the radial direction. The RSR exhibits several advantages: (1) With its distinctive rotor and stator internals, the RSR demonstrates an outstanding self-cleaning effect; (2) the RSR features a straightforward structure and ease of operation, leading to reduced operating costs; (3) RSR has better gas-side mass-transfer performance and micromixing efficiency than RPB; (4) in comparison to traditional devices, the RSR offers the benefit of a compact size, contributing to a reduction in equipment investment. ,, Therefore, the RSRs have been applied to CO 2 absorption, nanomaterial preparation, and so forth. , …”