Guys, when calculating mass transfer processes with limited mass transfer, how do we determine the gas-liquid mass transfer coefficient?

Regarding the first question: There are many methods for calculating the mass transfer coefficient in mass transfer-limited processes, with experimental determination being the most common approach. Simulation calculations, theoretical analysis, and other methods can also be used to estimate the mass transfer coefficient. The specific method needs to be determined based on your experimental conditions and specific issues. Regarding the second question: when studying the continuous polycondensation process of nylon 66, and calculating the bulk concentration and equilibrium concentration of water under mass-transfer-limited conditions, it is necessary to choose an appropriate method based on your experimental conditions and specific issues. Under normal circumstances, the main concentration and equilibrium concentration of water can be determined by measuring the changes in the water concentration in the sample. Specific methods include measuring the sample before and after the reaction, or taking samples at regular intervals during the reaction to analyze the water concentration, etc. .

Thank you for your guidance. For the second question, simulation methods need to be used for calculation; no relevant experimental literature has been found yet. What methods can be employed to determine the main concentration and equilibrium concentration of water?

For such parameters, it is recommended to commission research institutions and universities to conduct experiments; generally, it is difficult to find relevant literature, or the available literature cannot verify its authenticity.