Kinetic modeling of the formation and growth of inorganic nano-particles during pulverized coal char combustion in O2/N2 and O2/CO2 atmospheres

Shaddix, Christopher R.; Niu, Yanqing; Hui, Shi'en; Wang, Shuai

doi:10.1016/j.combustflame.2016.08.021

Title: Kinetic modeling of the formation and growth of inorganic nano-particles during pulverized coal char combustion in O₂/N₂ and O₂/CO₂ atmospheres

Journal Article · Mon Aug 01 00:00:00 EDT 2016 · Combustion and Flame

DOI:https://doi.org/10.1016/j.combustflame.2016.08.021· OSTI ID:1326060

Shaddix, Christopher R. ^[1]; Niu, Yanqing ^[2]; Hui, Shi'en ^[3]; Wang, Shuai ^[2]

Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Xi'an Jiaotong Univ., Xi'an (China)
Xi'an Jiaotong Univ., Shaanxi (China)

In this formation of nano-particles during coal char combustion, the vaporization of inorganic components in char and the subsequent homogeneous particle nucleation, heterogeneous condensation, coagulation, and coalescence play decisive roles. Furthermore, conventional measurements cannot provide detailed information on the dynamics of nano-particle formation and evolution, In this study, a sophisticated intrinsic char kinetics model that considers ash effects (including ash film formation, ash dilution, and ash vaporization acting in tandem), both oxidation and gasification by CO₂ and H₂O, homogeneous particle nucleation, heterogeneous vapor condensation, coagulation, and and coalescence mechanisms is developed and used to compare the temporal evolution of the number and size of nano-particles during coal char particle combustion as a function of char particle size, ash content, and oxygen content in O₂/N₂ and O₂/CO₂ atmospheres .

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Research Organization:: Sandia National Lab. (SNL-CA), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000

OSTI ID:: 1326060

Alternate ID(s):: OSTI ID: 1396678

Report Number(s):: SAND-2016-8661J; PII: S0010218016302322; TRN: US1700151

Journal Information:: Combustion and Flame, Vol. 173; ISSN 0010-2180

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 24 works

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Title: Kinetic modeling of the formation and growth of inorganic nano-particles during pulverized coal char combustion in O2/N2 and O2/CO2 atmospheres

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Title: Kinetic modeling of the formation and growth of inorganic nano-particles during pulverized coal char combustion in O₂/N₂ and O₂/CO₂ atmospheres