Langmuir Model Formulations Quiz

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Questions and Answers

What is the maximum saturation degree in the given task?

  • 0.6
  • 0.8
  • 0.4 (correct)
  • 0.2

What is the value of 𝑣ത𝑖 in the equation 𝑍 𝑣ҧ 𝑖 − = 0.8988 + 0.3253 ⋅ log10 13.5 − 0.0365 ⋅ log10 13.5?

  • 13.5 (correct)
  • 10
  • 0.8988
  • 0.3253

What is the value of 𝑀𝑙𝑖𝑚 𝑣ҧ𝑖?

  • 1.22 gi (correct)
  • 100 gi
  • 6.64 ads
  • 16.6 gi

What assumption is made regarding the concentration of n-butanol in the system?

<p>It remains constant over time (C)</p> Signup and view all the answers

What is the simplification made for the calculation of the concentration of trace gases in the ppm range?

<p>Molar fraction is nearly the same as mass fraction (B)</p> Signup and view all the answers

In a perfectly mixed system, what is assumed about the concentration of gases?

<p>It is constant everywhere in the room (D)</p> Signup and view all the answers

What relationship is assumed between the evaporation rate and absorption rate of n-butanol?

<p>Evaporation rate equals absorption rate (D)</p> Signup and view all the answers

What is the maximal mass load ratio of the adsorbent?

<p>1 g(ads)/mmol(CO2) (C)</p> Signup and view all the answers

What is the proper formulation of the model equation for the air conditions to fully exploit the adsorbent capacity?

<p>$K_p p_{i,eq} \Theta_{eq} = 1+K_p p_{i,eq}$ (C)</p> Signup and view all the answers

What is the final adsorber load when using a Langmuir-type molecular filter (𝑀𝑚𝑎𝑥 = 30 g ads., 𝐾𝐿 = 12.5) to adsorb carbon dioxide from a flue gas?

<p>450 g ads. (B)</p> Signup and view all the answers

After how many hours does the filter need to be replaced if the separation efficiency is 100% (filling time)?

<p>30 hours (D)</p> Signup and view all the answers

What does the symbol Θ represent in the Langmuir model?

<p>Surface coverage (D)</p> Signup and view all the answers

What does the symbol 𝐾𝑝 represent in the Langmuir equation?

<p>Adsorption rate constant (A)</p> Signup and view all the answers

What is the dimensionless Langmuir constant denoted by 𝐾𝐿?

<p>Surface coverage at equilibrium (B)</p> Signup and view all the answers

What does the symbol 𝑦෤𝑖 represent in the Langmuir equation with the law of Dalton?

<p>Molar fraction (C)</p> Signup and view all the answers

What is the expression for surface coverage at equilibrium (Θ𝑒𝑞) in terms of Langmuir constants?

<p>[1+𝐾𝐿 𝑦෤𝑖] / [𝐾𝐿] (A)</p> Signup and view all the answers

What does the symbol 𝑛ሶ 𝑎𝑑𝑠 represent in the Langmuir model?

<p>Desorption rate constant (A)</p> Signup and view all the answers

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