Preparation of nanofluids and their applications in enhanced CO₂ absorption

Abstract

Nanofluids opened up research in the field of thermal energy and mass transfer engineering when it was first proposed by American scientist Choi. In this paper, a two-step method was used to prepare stable nanofluids. Enhancement factor was introduced to study the enhancement of CO2 absorption by nanofluids under different experimental conditions. The results show that the enhancement of the three nanoparticles in the same solid content is TiO2 > Al2O3 > SiO2; The optimum solid content of SiO2 and Al2O3 is 0.8 g/L, and the optimum solid content of TiO2 is 0.6 g/L; Within the scope of this study, the larger the particle size, the better the absorption effect. As the organic amine concentration increases, absorption of solution improves.