Simulation and Optimization of RESS Process in Engineering Nanoparticles Synthesis

Modeling of rapid expansion of supercritical solution (RESS) was carried out applying mass, energy, momentum analogies and appropriate numerical technique for an organic Fluorinated Tetraphenylporphyrin (TBTPP). The results of RESS validated model demonstrated that increasing the pre-expansion temperature produced larger nanoparticles due to its effect on materials agglomeration. On the contrary, higher pre-expansion pressure led to smaller nanoparticles. The numerical data indicated higher cone angle, and smaller diameter of nozzle resulted in smaller particle size. Furthermore, small particle sizes were obtained applying lower expansion chamber pressure. Numerical results showed that operation of nozzle with addition of a capillary decreased the average particle size.

کلیدواژه ها:

RESS ، Supercritical Solution ، Nanoparticles ، Nucleation ، Growth mechanism