Diffusion Coefficient for gases at different temperatures

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SUMMARY

The discussion focuses on the diffusivity (diffusion coefficients) of gases, specifically hydrogen and methane in air, at varying temperatures. Users seek specific figures for the diffusivity of hydrogen into air at 300°C for hydrogen and 100°C for air. The conversation emphasizes the need for clarity on how Fick's laws apply to gases at different temperatures, as they are traditionally based on gases at the same temperature. No definitive values or examples were provided in the discussion.

PREREQUISITES
  • Understanding of gas diffusion principles
  • Fick's laws of diffusion
  • Knowledge of temperature effects on gas behavior
  • Basic thermodynamics related to gas mixtures
NEXT STEPS
  • Research the diffusion coefficients of hydrogen and methane at various temperatures
  • Explore the application of Fick's laws for gases at different temperatures
  • Investigate experimental methods for measuring gas diffusivity
  • Study the impact of temperature on gas mixture behavior in thermodynamics
USEFUL FOR

Chemical engineers, researchers in gas dynamics, and professionals involved in thermodynamic studies of gas mixtures will benefit from this discussion.

capanni
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Does anyone know figures for Diffusivity (diffusion coefficients) for two gases at different temperatures.

Such as air - Hydrogen or air-methane.

For example the diffusivity of hydrogen into air when the hydrogen is at 300C and the air at 100C.

Please don't point me to Fick's laws unless you can be specific about how these work for the above as, as far as I am aware they are based on gas at the same temperature.
 
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No one has any ideas?
How about for the same gas at different temp?
 

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