The impact of turbulent mixing on the oxidation of a chlorinated hydrocarbon

Article Abstract:

Faster mixing of chlorinated hydrocarbons is found to yield lower Reynolds numbers and greater amounts of flouranthene, a toxic combustion byproduct. Lower Reynolds number flames produced more aromatic and chlorinated aromatic species compared to higher Reynolds number flames. The most number of chlorinated species in the postflame gases were chloronaphthalene, while methyl chloride was effectively destroyed in all the Reynolds numbers used. Methyl chloride and methane were combusted in a combustion wind tunnel with a coflow of air with varied Reynolds numbers used ranging from 3,500 to 7,200.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Chlorinated Hydrocarbons, Analysis, Oxidation-reduction reaction, Oxidation-reduction reactions, Chlorocarbons, Hydrocarbons

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Emission factors for polycyclic aromatic hydrocarbons from biomass burning

Article Abstract:

The burning of crop and forest residue biomass emits harmful polycyclic aromatic hydrocarbons (PAHs) which are toxic and may cause cancer. To determine the risks posed by PAHs, open burn simulations were conducted in a combustion wind tunnel. The results showed that burning conditions and fuel type determined the amount of biomass-derived PAH and that levels of PAH varied for different sources. In general, PAH emission rates were high for sources with low combustion efficiency.

Environmental aspects

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Some observations on times to equilibrium for semivolatile polycyclic aromatic hydrocarbons

Article Abstract:

A study was conducted on the time required by semivolatile polycyclic aromatic hydrocarbons to reach equilibrium in conditions of moderate and cool temperatures. Results revealed that under warm temperatures, semivolatiles equilibrate rapidly from the gas to the particle phase. In cool conditions, more volatile substances took less time to reach equilibrium, while compounds like phenanthrene and pyrene took several hours to attain the same.

Chemical equilibrium, Volatile organic compounds

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