Lecture

Stationary Emission Control

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Description

This lecture covers the motivation and legislation behind stationary emission control, including the composition of biomass, terms and definitions, and selection criteria for emission control systems. It explores non-catalytic processes like SO2 scrubber and SNCR process, as well as catalytic processes such as oxidation of CO and VOC. The lecture also delves into the legislation in Switzerland regarding air pollution control, with a focus on inorganic substances and their limit values. Additionally, it discusses common abbreviations in emission control, design objectives for emission control systems, and principle options for controlling gaseous emissions and particulate matter.

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A catalytic converter is an exhaust emission control device that converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction. Catalytic converters are usually used with internal combustion engines fueled by gasoline or diesel, including lean-burn engines, and sometimes on kerosene heaters and stoves. The first widespread introduction of catalytic converters was in the United States automobile market. To comply with the U.S.

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Selective catalytic reduction

Selective catalytic reduction (SCR) means of converting nitrogen oxides, also referred to as NOxNOx with the aid of a catalyst into diatomic nitrogen (N2), and water (H2O). A reductant, typically anhydrous ammonia (NH3), aqueous ammonia (NH4OH), or a urea (CO(NH2)2) solution, is added to a stream of flue or exhaust gas and is reacted onto a catalyst. As the reaction drives toward completion, nitrogen (N2), and carbon dioxide (CO2), in the case of urea use, are produced.

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