Application of modified moments method for kinetics description of nano-, micro-particles formation in gas phase

A. Durov; M. Deminsky; M. Strelkova; B. V. Potapkin

doi:10.1117/12.562656

28 May 2004 Application of modified moments method for kinetics description of nano-, micro-particles formation in gas phase

A. Durov, M. Deminsky, M. Strelkova, B. V. Potapkin

Author Affiliations +

Proceedings Volume 5401, Micro- and Nanoelectronics 2003; (2004) https://doi.org/10.1117/12.562656
Event: Micro- and Nanoelectronics 2003, 2003, Zvenigorod, Russian Federation

Abstract

The description of dynamics of particles size distribution function (PDF) in processes of new phase formation is important task in various technologies. Moments method is one of modern approaches which meet demands of accuracy and moderate usage of computer resources. Modified moments method which permits one to describe correctly both particles growth (in results of nucleation, coagulation and surface reactions) and gasification is proposed and developed in this work. Proposed approach connect correctly balance between growing particles and chemical precursors in contrary to present state of art. This is important when rates of particle decomposition, gasification, combustion are compatible with the rate of particle growth. The model calculations were carried out to show that approach gives incorrect rate of soot formation in the mentioned above case. Modified method of moment was applied for simulation of hydrocarbons combustion and conversion. In particular steam reforming of methane was simulated in details. The processes of soot formation include polycyclic aromatic hydrocarbon (PAH) lumping mechanism, soot formation in results of PAH coagulation in three dimensional structures, coagulation of soot particles, soot particles growth and gasification due to surface chemistry. Chemical mechanism also includes the general chemistry of methane decomposition with PAH and soot precursors formation. The comparison of theoretical and experimental results demonstrates that developed approach can describe species concentration and PDF evolution adequately.

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A. Durov, M. Deminsky, M. Strelkova, and B. V. Potapkin "Application of modified moments method for kinetics description of nano-, micro-particles formation in gas phase", Proc. SPIE 5401, Micro- and Nanoelectronics 2003, (28 May 2004); https://doi.org/10.1117/12.562656

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KEYWORDS

Particles

Methane

Chemistry

Combustion

Americium

Atmospheric particles

Carbon

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