Crossflow alkali scrubbers play a crucial role in controlling air pollution by removing acidic gases from industrial emissions using alkali solutions. They work on a similar principle as crossflow acid scrubbers, where the gas and liquid flow in perpendicular directions, promoting the interaction and chemical reaction.
Usually, alkaline solutions like sodium hydroxide (NaOH) or calcium hydroxide (Ca(OH)2) are employed. These solutions neutralize acidic gases like Hydrogen Sulphide or hydrogen chloride , transforming them into harmless compounds.
What's great about these scrubbers is that they offer effective contact between the gas and liquid phases, have a compact design, and can handle high gas flow rates. However, it's important to emphasize that careful planning and consideration of various parameters are compulsory. The design should be tailored to meet specific application requirements, including the nature of pollutants, desired removal efficiency, and available space.
