Liquid metal with solvents for CO₂ capture

Abstract

Carbon dioxide (CO 2 ) capture is an essential method for emission control. In CO 2 capture, although with the promising advantage of industrial application, chemical absorption meets the challenge of substantial energy consumption. Thus, an advanced solvent with liquid metal GaInSn/PANI/TEMPO has been first developed to reduce the energy consumption. The intensified thermoelectric effect between GaInSn/PANI/TEMPO has the potential to enhance the CO 2 desorption. Density functional theory (DFT) model and spherical mass transfer and energy transfer model in the nanoscale are developed to study the mass and energy transfer in CO 2 and GaInSn/PANI/TEMPO. The CO 2 fraction, electron density, and velocity in the nanodomain are studied. The symmetrical electron density zone is identified for the thermoelectric effect. The mass transfer coefficient is increased by twofolds. The thermoelectric conversion amount reaches 32.6-44.8% and the energy consumption is reduced to 1.07 GJ t −1 . The CO 2 desorption is finally proven to occur at temperature below 339 K.

Modeling a Rotary Kiln Retrofitted by Energy Recovery for CO2 Capture

“…Thus, it is very essential to recover the waste heat. The waste heat is recovered by the SiGe with single‐atom fluid, which is prepared based on the methods in our previous work 22, 23. The single‐atom fluid shows the characteristic of high temperature resistance and SiGe produces the thermoelectric effect.…”

“…The new single‐atom fluid provides an alternative way to recover energy since the corresponding research works have proven that the single‐atom system produces a thermoelectric effect 22, 23. To fully recover the energy and further reduce the costs, a new system is developed here, based on the decomposition of CaCO 3 by a rotary kiln.…”