CO2 capture by water-based Al2O3 and Al2O3-SiO2 mixture nanofluids in an absorption packed column

Abstract

"In the present work, the influence of mixture of Al 2 O 3 and Al 2 O 3 - SiO 2 nanoparticles in base fluid water (nanofluid) on absorption of CO 2 in a packed column was investigated. The e ff ects of concentration of nanoparticles and types of nanoparticles on the absorption rate were investigated. The packed column was used to study gas liquid countercurrent flow. The results indicated that the optimum value was equal to 0.05 vol% for both nanofluids, and also addition of nanoparticles increased the mass transfer rate. Besides, the maximum enhancement of mass transfer rate for nanoparticles of Al 2 O 3 and mixture of Al 2 O 3 - SiO 2 compared to the pure water was 14% and 10% at 0.05 vol% of the nanofluid, respectively."