**Conclusions**

evolution of an M/NaCl/Ar combustion aerosol. Nano-encapsulation is obtained directly by condensing the second phase material (NaCl) over the M core particles, producing coated particles, and indirectly via coagulation of the uncoated particles with coated particles. Direct

Particle encapsulation at constant temperature was studied. The results are characterized by a very short initial high rate of condensation followed by a long period of slow rate of condensation. Only a very small percentage of the population is coated, and the encapsulated particles possess a very light coating. The alternatives to increase the number of particles being encapsulated and the thickness of the encapsulation are not practical or feasible. Encapsulation when the aerosol is subject to constant heat loss was studied. This process exploits the facts that by dropping aerosol temperature more condensable material is available for encapsulation and more particles are directly encapsulated since r\* obtain lower values. Results show that only a small fraction of the particles receive most of the condensable material. The concentra‐ tion and size of these particles determine the final size and concentration of the NaCl particles. Conditions to encapsulate most of the particles during the cooling process were sought. It was found that for the same mass of aerosol, the percentage of coated particles can be increased by decreasing particle concentration. Encapsulation of uncoated particles via coagulation with the coated particles was also studied. Results show that 90% of the particles can be encapsu‐ lated within a time period comparable to the typical experimental residence time. Numerical results for particle size and number of particles within a NaCl particle show good agreement

understanding in the particle encapsulation process and has shown the usefulness of the

2. This work has gained substantial

encapsulation occurs through heterogeneous condensation of supersaturated vapors.

with experimental observations for Ti, AIN, and TiB

108 Montecarlo Simulation of Two Component Aerosol Processes

Markov-MC model to study two-component aerosols.

Address all correspondence to: jhuertas@itesm.mx

Tecnológico de Monterrey, Mexico

**Author details**

Jose Ignacio Huertas

## **Chapter 7**
