17 Questions
What is the maximum saturation degree in the given task?
0.4
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
What is the value of 𝑀𝑙𝑖𝑚 𝑣ҧ𝑖?
1.22 gi
What assumption is made regarding the concentration of n-butanol in the system?
It remains constant over time
What is the simplification made for the calculation of the concentration of trace gases in the ppm range?
Molar fraction is nearly the same as mass fraction
In a perfectly mixed system, what is assumed about the concentration of gases?
It is constant everywhere in the room
What relationship is assumed between the evaporation rate and absorption rate of n-butanol?
Evaporation rate equals absorption rate
What is the maximal mass load ratio of the adsorbent?
1 g(ads)/mmol(CO2)
What is the proper formulation of the model equation for the air conditions to fully exploit the adsorbent capacity?
$K_p p_{i,eq} \Theta_{eq} = 1+K_p p_{i,eq}$
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?
450 g ads.
After how many hours does the filter need to be replaced if the separation efficiency is 100% (filling time)?
30 hours
What does the symbol Θ represent in the Langmuir model?
Surface coverage
What does the symbol 𝐾𝑝 represent in the Langmuir equation?
Adsorption rate constant
What is the dimensionless Langmuir constant denoted by 𝐾𝐿?
Surface coverage at equilibrium
What does the symbol 𝑦𝑖 represent in the Langmuir equation with the law of Dalton?
Molar fraction
What is the expression for surface coverage at equilibrium (Θ𝑒𝑞) in terms of Langmuir constants?
[1+𝐾𝐿 𝑦𝑖] / [𝐾𝐿]
What does the symbol 𝑛ሶ 𝑎𝑑𝑠 represent in the Langmuir model?
Desorption rate constant
Test your knowledge of Langmuir model formulations with this quiz. Explore surface coverage, adsorption and desorption rate constants, and the Langmuir equation.
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