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Module 6: Air Pollutants and Control Techniques - Halogens - Formation Mechanisms
Practice Problems
Objective
- Describe the mechanisms involved in the formation of hydrogen chloride and hydrogen fluoride.
The concentrations of hydrogen chloride and hydrogen fluoride formed during waste incineration and fossil-fuel combustion are directly related to the chloride and fluoride concentration of the waste or fuel being fired. Essentially all of the chloride and fluoride compounds are volatile; therefore, very little remains in the bottom ash. Chlorinated and fluorinated compounds form hydrogen chloride and hydrogen fluoride almost immediately upon combustion and are released into the gas stream. These two acid gases remain in the vapor phase and do not participate in heterogeneous nucleation; however, small quantities of hydrogen chloride and hydrogen fluoride can absorb into water that is on the surfaces of particles when the gas stream has cooled sufficiently.
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#1
- Can thermal and catalytic oxidizers, used as VOC control devices, generate hydrogen chloride and hydrogen fluoride pollutants?
Practice Problems
Halogens - Formation Mechanisms
- Instructions:
- Complete the Practice Problems before proceeding to the next section. Click on the button below.