The following article will guide you about how to control emissions of nitrogen oxides in air. 1. Absorption by Liquids: The oxides of nitrogen can be absorbed by water, hydroxide and carbonate solutions, sulphuric acid, organic solutions and molten alkali carbonates and hydroxides. Several scrubbing techniques were developed which initially used solutions of sodium and calcium hydroxide. Some of the [...]
The following points highlight the two main methods used in the treatment of sulphur from flue gas emissions. The methods are: 1. Dry Methods 2. Wet Processes. 1. Dry Methods: The dry methods can be divided, broadly, into two types: (i) Oxidation/reduction methods. (ii) Metal oxides usage. (i) Oxidation/Reduction: Catox Process: This method of oxidation is popularly known as the [...]
There are six procedures for controlling the emissions of SOx. They are either in-plant control measures or effluent treatment methods: 1. Natural dispersion by dilution. 2. Using alternate fuels. 3. Removal of sulphur from fuels desulphurisation. 4. Process modifications. 5. Control of SOx in the combustion process. 6. Treatment of flue gas emissions. The different control methods are described as [...]