شماره ركورد كنفرانس :
5041
عنوان مقاله :
Mathematical Modeling of Rapid Expansion of Supercritical Solution Process under Subsonic Conditions
Author/Authors :
H. Bagheri Department of Chemical Engineering - College of Engineering - Shahid Bahonar University of Kerman, Kerman, Iran , H. Hashemipour Department of Chemical Engineering - College of Engineering - Shahid Bahonar University of Kerman, Kerman, Iran
كليدواژه :
RESS , Modeling , One Dimensional , Subsonic , Supercritical CO2
عنوان كنفرانس :
The 10th International Chemical Engineering Congress & Exhibition (IChEC 2018)
چكيده فارسي :
چكيده فارسي ندارد.
چكيده لاتين :
A supercritical fluid (SCF) is any substance at a temperature and pressure above its critical point, where distinct liquid and gas phases do not exist. It can effuse through solids like a gas, and dissolve materials like a liquid. In this study, a one-dimensional flow model has been proposed to describe the particle formation through the subsonic rapidexpansion of supercritical solutions (RESS). This model includes the wall friction in the nozzle and no heat exchange between fluid inside the nozzle and its surrounding due to a very short resident time inside the nozzle. For the flow inside the nozzle, the fluid temperature, pressure and density gradually decrease, and the velocity slowly picks up till the nozzle tip The calculations were performed on the ibuprofen-supercritical CO2 system in terms of the supersaturation and nucleation rate. The results show that low supersaturation (approximately 16), thus low nucleation rate can be attained in subsonic nozzle region.
