Concept explainers
(a)
Interpretation:
The rate of heat removal from the adsorber is to be calculated such that the process remains isothermal. Also, the time taken to reach the saturation of bed is to be calculated.
Concept introduction:
When vapor from a gas mixture is transferred to a solid surface, gas adsorption occurs. It can be treated as condensation of vapor on a solid surface in a simplified way.
Raoult’s law states that,
Here,
Antoine equation is used to determine the vapor pressure of any substance at the given temperature by the equation:
Here,
The rate of heat transfer is calculated as:
Removal of heat from any vapor at its normal boiling point leads to the condensation of the vapor to liquid phase until all the vapor is condensed and further removal of heat leads to the cooling of the liquid. If less heat is removed from the vapor, then partial condensation happens, and vapor and liquid coexist at its normal boiling point.
(b)
Interpretation:
The formula for surface-to-volume ratio for the spherical particles is to be derived. Based on this formula, the efficiency of the adsorption process on decreasing the particle average diameter is to be explained. Also, the irrelevance of calculating the surface-to-volume formula is to be explained.
Concept introduction:
When vapor from a gas mixture is transferred to a solid surface, gas adsorption occurs. It can be treated as condensation of vapor on a solid surface in a simplified way.
Volume of a sphere
Here,
Surface area of a sphere
Here,
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Chapter 8 Solutions
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