Mass transfer enhancement during CO sub(2) absorption process in methanol/Al sub(2)O sub(3) nanofluids

The objectives of this paper are to analyze the mass transfer characteristics during CO sub(2) bubble absorption and diffusion processes in nanofluid with Al sub(2)O sub(3) nanoparticles. To analyze the effect of the nanopartides on the mass transfer enhancement, the surface tension and viscosity of the nanofluids are measured. It is found that Al sub(2)O sub(3) nanopartides enhance CO sub(2) absorption rate and increase the viscosity as high as 11% at 0.01 vol% but the surface tension keeps almost constant. The images of bubble absorption and diffusion are captured by a high-speed camera with the shadow-graph method. It is found that the mass transfer coefficient is enhanced up to 26% at 0.01 vol% compared with pure methanol.