Viktor Evgenievich Bozhevolnov

Methodology of developing optimal nanotechnologies

The knowledge accumulated by chemical engineering makes it possible to create a methodology of the rational development of new science intensive technologies. One of the versions of such a methodology implies the formulation of principles and the revelation of methods for study, which shortens the way from the technological idea formation to its industrial implementation. This version implies passing from an a priori physicochemical model of phenomena which led to a technological idea to an a posteriori model of processes in industrial apparatuses where these phenomena should occur. In doing this, it seems expedient to combine numerical and real experiments with an iterative extension of the range of implementation conditions of phenomena from laboratory to industrial ones. The efficiency of such a methodological approach is evidenced by the experience of the development of the technology of an Ostim medicinal preparation.

Developing optimized technologies for new-generation materials

We formulate a mesokinetic model of feedstock transformation into a material based on a system of devices in which the material is mechanically, thermally, or chemically modified. The idea of a frequency function that describes the rate of change of the function of particle distribution for a substance over the states in each device has been introduced. The possible application of the model to the development of technology that provides the maximum contribution of every device to the feedstock transformation to material is considered. It has been shown that, in developing the technology of the materials, it should be taken into account that, in many systems, the function of the size distribution of the particle varies according to the Fokker–Planck equation.

Chemojet Motion in Crystallization

It was found experimentally that free bodies 40 to 60 μm in size come into additional motion in various gases once a topochemical reaction has begun on their surface to yield a crystalline product on the surface or in the bulk. This motion was called chemojet motion, and the bodys velocity was found to depend on the crystallization rate and to what extent crystallization is localized at active sites. Comparing the observed data with the mathematical model of chemojet motion suggested that this kind of motion is intermediate between Brownian motion and jet propulsion. Chemojet motion may be either directional or chaotic. Investigating this phenomenon is expected to deepen insight into surface processes.