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</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</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</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</p> Signup and view all the answers

    What is the maximal mass load ratio of the adsorbent?

    <p>1 g(ads)/mmol(CO2)</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>$K_p p_{i,eq} \Theta_{eq} = 1+K_p p_{i,eq}$</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.</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</p> Signup and view all the answers

    What does the symbol Θ represent in the Langmuir model?

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

    What does the symbol 𝐾𝑝 represent in the Langmuir equation?

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

    What is the dimensionless Langmuir constant denoted by 𝐾𝐿?

    <p>Surface coverage at equilibrium</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</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]</p> Signup and view all the answers

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

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

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