Where can I buy and sell kxa coins (which exchange can I buy kda coins on)

Why should we introduce the volumetric mass transfer coefficient kxa? What is its physical meaning?

Hello, it is based on the fact that the mass transfer rate G is proportional to the mass transfer area F and the mass transfer driving force △.

The mass transfer area is the interphase contact area. The driving force can be the average of various concentration differences or pressure differences. That is, G = KF △ average. K in the formula is the mass transfer coefficient.

Since the mass transfer rate and mass transfer driving force can be in various units, the mass transfer coefficient must be in corresponding units so that the units on both sides of the equation are consistent with each other. For example, the unit of K is kilomol/m2·hour·(kilonewton/m2) or kilomol/m3·hour·(kilonewton/meter2), etc. Since the interphase contact area cannot be directly determined, the volume mass transfer coefficient Ka is often used, in units of kilogram molecules/hour·m3·atmosphere, etc.

The mass transfer coefficient can reflect the intensity of this specific mass transfer process (the amount of material transferred from one phase to another phase per unit time per unit area, unit concentration or pressure difference).

Using similarity theory or dimensional analysis, it is compiled based on experimental data.

Hope it helps.

What is the engineering significance of the measurement of volumetric mass transfer coefficient Kxa

The mass transfer coefficient can reflect the intensity of this specific mass transfer process (substance is transferred from one phase per unit time in unit area, unit concentration or pressure difference) into another phase).

The mass transfer coefficient is based on the fact that the mass transfer rate G is proportional to the mass transfer area F and the mass transfer driving force △. The mass transfer area is the interphase contact area. The driving force can be the average of various concentration differences or pressure differences. The answer is G=KF△all. K in the formula is the mass transfer coefficient.

What is the practical significance of measuring the volume absorption coefficient kxa

First of all, if you have learned absorption, you must have learned heat transfer. The absorption coefficient in the absorption rate equation is equivalent to the heat transfer coefficient in the heat transfer rate equation. Therefore, the absorption coefficient is of great significance to absorption calculations just as the heat transfer coefficient is to heat transfer calculations.

Secondly, without accurate and reliable absorption coefficient data, all the above calculation formulas and methods involving absorption rate will lose their actual value.

Again, the influencing factors in the transmission process are complex and related to physical properties, equipment type, filler condition and specifications, etc. Therefore, the general or fundamental way to obtain the absorption coefficient is experimental measurement. The absorption coefficient measured experimentally can be used in the actual absorption process, tower reactor design, design calculation, etc. with a certain degree of reliability.

Finally, we can say that the absorption coefficient Kya comes from experimental measurement and is an important basis for Chinese experiments and industrial design. Therefore, the measurement of absorption is of great significance for both experimental operations and industrial design and production.

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