QDTG Gaseous Mass Transfer and Diffusion Unit

11.1.6.- 扩散
GASEOUS MASS TRANSFER AND DIFFUSION UNIT - QDTG
GASEOUS MASS TRANSFER AND DIFFUSION UNIT - QDTG
GASEOUS MASS TRANSFER AND DIFFUSION UNIT - QDTG
GASEOUS MASS TRANSFER AND DIFFUSION UNIT - QDTG

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The Gaseous Mass Transfer and Diffusion Unit, "QDTG", allows the students to familiarize with the theoretical concepts about mass transfer unit operations, specifically the diffusion of a volatile liquid in an inert gas, obtaining very useful experimental data and results for the good practical understanding of the process and, therefore, for the technical training of the students.

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交互式计算机辅助教学软件

一般說明

The Gaseous Mass Transfer and Diffusion Unit, "QDTG", allows the students to familiarize with the theoretical concepts about mass transfer unit operations, specifically the diffusion of a volatile liquid in an inert gas, obtaining very useful experimental data and results for the good practical understanding of the process and, therefore, for the technical training of the students.

The unit consists of a vertical capillary tube with a volatile solvent (liquid A) and gas (air), which will flow horizontally under laminar flow conditions in the upper end of the tube. This air is introduced by a blower.

The capillary tube is introduced in a controlled temperature thermostatic bath, which will work following the double boiler method. The solvent will be evaporated slowly due to the thermal energy of the bath. And due to the concentration gradient, the gaseous solvent will be dispersed upwards, from the surface of the liquid solvent towards the pure air. The air flow will transport the molecules of the solvent and the volume of the liquid solvent in the tube will be reduced. There is an optical system with fine focusing adjustment to measure this level difference.

練習和指導練習

手册中包含的指导实践练习

  1. Fick´s law application to calculate the diffusivity.
  2. Direct measurement of mass transfer rates.
  3. Determination of molar density transfer rate.
  4. Study of the effect of temperature on diffusion coefficients.
  5. Use of gas laws to calculate concentration differences in terms of partial pressures.
  6. Graphic representation of the concentration profiles.
  7. Gaining familiarity with the use of laboratory instruments to achieve measurements of data required for industrial process design.

可用的类似设备

LIQUID MASS TRANSFER AND DIFFUSION UNIT - QDTL
  • QDTL
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11.1.6.- 扩散
QDTL
Liquid Mass Transfer and Diffusion Unit
The QDTL is a teaching unit that allows the students to familiarise with the notions of mass transfer theory, specially the diffusion in liquid systems, obtaining experimental data and results which are very useful for an ideal practice...
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