23 Questions
Which type of solids are used for ambient temperature CO2 adsorption?
Zeolites and metal-organic frameworks (MOFs)
What is a major disadvantage of current adsorption processes for CO2?
Limited to small-to-medium scale tonnage separations
What modification is made to silica and aluminum based high surface area porous solids to adsorb CO2 at low temperatures?
Addition of amine groups
What is the selectivity mechanism for CO2 adsorption on aminophenyl surface groups?
Large number of aminophenyl groups
What type of equilibria serves as the selectivity mechanism for CO2 adsorption?
Adsorption equilibria
What is the ideal isotherm for CO2 adsorption?
Ideal isotherm for the hexa-amino group
What is a disadvantage of liquid phase chemical absorption systems for CO2 capture?
Amine breakdown during regeneration
What are the alternatives mentioned for CO2 adsorption?
Physical adsorption using molecular sieving zeolites, metal-organic frameworks (MOFs)
What will enhance capacity in CO2 adsorption processes?
Improved adsorbents
What type of equilibrium condition is represented by ci(A) = Kici(B) where Ki >> 1?
Under equilibrium conditions
What type of equilibria is mentioned in the context of CO2 adsorption?
Adsorption equilibria
What is the disadvantage of current adsorption processes for CO2?
Limited to small-to-medium scale tonnage separations
In the context of CO2 capture, what does a steep curve in the amount adsorbed vs. pressure graph indicate?
High loading of CO2 at low pressures
What does the selectivity to CO2 indicate in the given graph?
Increasing CO2 selectivity
What does the equation $c (B) i,IN$ represent in the context of sorption with regeneration?
Initial concentration of component i in the interstitial fluid
What does the term 'bed voidage' ($\ñB$) represent in the context of sorption with regeneration?
Volume of the void spaces in the adsorbent bed
In the context of membrane separations, what does the term 'Ls' represent?
Length of the selective layer
What does the equation $\ñB = bed voidage$ represent in the context of sorption with regeneration?
Equation for the bed voidage
What does the term 'Ki >> 1' indicate in the context of sorption equilibrium?
Strong preference for component A over component B
What does the term 'DB, D(A)' represent in the context of sorption with regeneration?
Dispersion and pore diffusion coefficients
What does the equation $ci (t,L) = c (B) i,IN$ represent in the context of sorption with regeneration?
Equilibrium concentration of component i in the interstitial fluid
What does the term 'μ' represent in the context of sorption with regeneration?
Dimensionless time parameter
What does the term 'Gpi' represent in the context of sorption with regeneration?
Pore diffusion coefficient
Test your knowledge of CO2 adsorption technologies with this quiz on micro/mesoporous solids. Explore the disadvantages of liquid phase chemical absorption systems and learn about alternatives such as physical adsorption using molecular sieving zeolites and metal-organic frameworks.
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