2007 Volume 13 Issue 2 Pages 118-120
The effect of the pore size of microfilters installed in a supercritical (SC-) CO2 bubbling device on the concentration of CO2 dissolved in the solution was investigated. Dissolved CO2 concentration in the solution treated with a microfilter was approximately 27% higher than that without a microfilter for lower CO2/sample flow ratio, whereas there was no difference in the dissolved CO2 concentration between treatments with and without a microfilter at a higher flow ratio. Additionally, at 25MPa, the dissolved CO2 concentration reached a maximum with a 10μm pore size microfilter. However, at 10MPa, the highest concentration of dissolved CO2 was achieved with a 1μm pore size microfilter, and this concentration was the same as at 25MPa. Therefore, it was found that the same concentration of dissolved CO2 could be maintained by minimizing the microfilter pore size and lowering the pressure from 25 to 10MPa.