Synthesis of Silica Nanofluid and Application to CO₂Absorption

CO2 absorption/regeneration enhancement in DI water with suspended nanoparticles for energy conversion application

“…First, Fig. 9(a) shows the absorption mechanism of the bubble breaking effect [12], which states that the nanoparticles suspended in the base fluid cover the CO 2 micro bubbles, and as the movement of the nanofluids due to additional energy from the nanoparticles becomes more dynamic, the particles collide with the gas-liquid interface, and then the gas bubbles are cracked to small bubbles leading to the absorption performance enhancement [12,14]. Second, Fig.…”

“…9. Absorption mechanisms in nanofluids: (a) bubble breaking effect [12]; (b) shuttle (or grazing) effect [20]; (c) hydrodynamic effect [26]. to the base fluid (348 s).…”

“…Furthermore, the nanoparticles crash the bubbles and produce smaller bubbles, which increase the mass transfer during the bubble absorption process [10][11][12][13][14][15][16][17]. It is reported that the use of nanofluids enhances the CO 2 absorption rate [11][12][13][14][15][16][17].…”

“…It was reported that CO 2 mass transfer flux and mass transfer coefficient increased by 22.35% and 59%, respectively, for Fe 3 O 4 /water nanofluids with magnetic fields. While there are many studies on the CO 2 absorption enhancement [7][8][9][10][11][12][13][14][15][16][17], there is no research on CO 2 regeneration performance enhancement by using the nanofluids. Generally, the regeneration process in physical absorption mode needs the energy input.…”

Advances in Liquid Absorbents for CO2 Capture: A Review

“…Another study on CO 2 absorption using nanofluids was done by Kim et al by comparing the performance of nanoparticles in water and water without nanoparticles. 64 It was found that the capacity coefficient of CO 2 absorption in the former is 4 times higher than the latter, attributed to the fact that the small bubble sizes in the nanofluid having big mass transfer areas and high solubility.…”