Kaasunsiirto
Kaasunsiirto, or gas transfer, refers to the transport of gas molecules between phases, most commonly between a gas and a liquid, but also across membranes or porous solids. In scientific and engineering contexts it describes the rate at which a gas dissolves into a liquid or is released from it, driven by differences in partial pressure or chemical potential.
In a gas–liquid system the transfer proceeds through resistances in the gas boundary layer and the liquid
Measurement and design often use the volumetric mass transfer coefficient k_L a as a key figure of
Applications of kaasunsiirto span bioprocessing, where oxygen transfer limits fermentation and cell culture, environmental engineering with