ABSTRACT
Gaseous pollutants in ambient air come from fugitive and point sources. This chapter deals with an introduction on sources of gaseous points, types of common pollution reduction devices, and characteristics of gas streams that are relevant to pollutant removal. Adsorption, absorption, thermal oxidation, catalytic incineration, condensation, and biodegradation are processes commonly used to reduce point-source emissions of gaseous pollutants. The chapter describes principles, commonly-used systems and their components, important design considerations, and design calculations related to adsorption. It presents absorption, thermal oxidation, catalytic incineration, condensation, and biodegradation. End-of-the-pipe control processes for gaseous pollutants can be classified into two categories: recovery and destruction. Recovery processes refer to transferring compounds of concern (COC) in a gas stream to collection media which can be solid or liquid. The design of a thermal oxidation system depends on the COC concentrations in the influent gas stream, types of COCs, and the required destruction efficiencies or the required effluent COC concentrations.
