Compilation and evaluation of gas phase diffusion coefficients of halogenated organic compounds.

ABSTRACT: Organic halogens are of great environmental and climatic concern. In this work, we have compiled their gas phase diffusivities (pressure-normalized diffusion coefficients) in a variety of bath gases experimentally measured by previous studies. It is found that diffusivities estimated using Fuller's semi-empirical method agree very well with measured values for organic halogens. In addition, we find that at a given temperature and pressure, different molecules exhibit very similar mean free paths in the same bath gas, and then propose a method to estimate mean free paths in different bath gases. For example, the pressure-normalized mean free paths are estimated to be 90, 350, 90, 80, 120 nm atm in air (and N₂/O₂), He, argon, CO₂ and CH₄, respectiv

SUBMITTER: Gu W 

PROVIDER: S-EPMC6083652 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature