Membranes - Introduction to Carbon Capture and Sequestration - page 350

5. Which statement about fl ue gas separations using membranes
is not correct?
a. For a single stage membrane, the pressure ratio is so large
that too much energy is required for compression
b. The partial pressure of CO 2 in air is so low that it is an ideal
sweep gas for a membrane
c. A higher concentration of CO 2 in the air for the burner
requires retrofi tting of the power plant
6. Which statement on diffusion coeffi cients is not correct?
a. The Maxwell-Stefan diffusion coeffi cient uses the chemical
potential as a driving force
b. The Fick diffusion coeffi cient uses the concentration as a
driving force
c. In the limit of zero loading in a porous material, the self-
diffusion coeffi cient is identical to the Fick diffusion
coeffi cient
d. NMR can be used to measure the Fick diffusion coeffi cient
7. Which statement about polymer membranes is not correct?
a. The solubility of gasses in membranes can vary signifi cantly
b. The higher the permeability of a gas, the lower the selectivity
c. Rubbery polymers have lower selectivity compared to glassy
polymers
8. Which statement on facilitated transport in membranes is NOT
correct?
a. Facilitated transport of oxygen in blood uses hemoglobin as
a carrier
b. Amine solutions show strong facilitated transport
c. Ionic liquids with facilitated transport are of limited use
because the liquid evaporates