Improvement of CO2 absorption/desorption rate using new nano-fluid

Abstract

Increasing the serious impact of the emissions of carbon dioxide (CO2) on the warming of globe and change of climate make this issue is one of the most important issues facing the world that needs to be resolved urgently. Several techniques have been used to control CO2 emissions. One of the methods that achieved good results was the chemical absorption technique using absorption solutions. Recently, nano solutions have been used. This action has received attention. However, further studies are needed to enhance the absorption/desorption of nano fluids and reduce the energy requirements for the regeneration process. In this study, the nanoparticle suspended in blend of monoethanolamine and triethanolamine are utilized as a new solvent. Ultrasonic was used to obtain good suspension of the nanoparticle into the base fluid and also to ensure high stability. The results showed that the CO2 absorption using the Nano fluid is enhanced by ~28% for Al2O3, 19% for Fe2O3 and 15% for SiO2 compared to that with using the base fluid alone. In addition, the rate of CO2 desorption was increased by 47%, 28%, and 22% using the Nano fluids of Fe2O3, SiO2, and Al2O3, respectively, compared with the desorption rate of the base fluid without nanoparticles.