In this work, a model for particle formation and growth is used to simulate the aluminum particle synthesis by an evaporation-condensation process. The effect of commonly employed process parameters (vaporization temperature, cooling rate, system pressure) is investigated. The model to be solved is the general dynamic equation (GDE) that accounts for particle nucleation, condensation and coagulation at non-isothermal conditions. The GDE was solved using the nodal method. The methodology approximates the particle size distribution to a few nodes by introducing size-splitting operators. The simulation results show that particle formation and growth take place in a short temperature range. The coagulation increases the particle size while maintaining the number concentration. On the other hand, the surface condensation tends to shift the particles size distribution towards a larger size. It was shown that production of nanoparticles with a more uniform size distribution and smaller particles are favored using low pressure and low vaporization temperature. The particle size distribution is nearly influenced by the cooling rate in the range study here.
CPPM is the premier forum for theoretical and applied research on product and process modeling, simulation and optimization. The journal assembles the best papers from around the world and covers the gap between product and process. It brings together chemical engineering researchers, practitioners, and software developers in a new forum for the international modeling and simulation community.
01 May 2006
Rhamat Sotudeh-Gharebagh, Navid Mostoufi and Jamal Chaouki