課程名稱︰單元操作三
課程性質︰必修
課程教師︰劉懷勝
開課學院：工學院
開課系所︰化工系
考試日期（年月日）︰102/6/20
考試時限（分鐘）：120
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
Closed book:
1. (20%) The attached chromatographic results indicates the effect of different
injected sample volumes. Please explain what causes the distortion of
the peaks and what type of isotherm that you expect it to be.
See figure 1.
2. (16%) Explain the following terms briefly.
1) Rejection coeffiecient in membrane
2) Enantiotropic in crystallization
3) Critical moisture content in drying
4) Concentration polarization
5) Relative supersaturation
6) Psychrometric ratio
7) Polymorphism
8) Anion exchange membrane
3. (14%) The different between:
(a) Primary nucleatuib and second nucleation in crystallization. (6%)
If particles exist in the system during nucleation, does it belong
to primary or secondary nucleation? (4%)
(b) Wet bulb temperature and adiabatic saturation temperature (4%)
//
Open book
1. (15%) Batch adsorption tests were performed in the lab using solutions of
phenol ( V = 100 mL) and particles of granular activated carbon. The
equilibrium data at riim temperature are shown in the Table below.
Please determine the isotherm that fits the data.
(Show yuor calculation abd units clearly)
Table : see figure 2
2. (15%) Data for the filtration of CaCO3 flurry in water at 25 degree C are
reported as follows at a constant pressure 6.7 psia. The area of the
plate and frame press was 0.0439 m^2 and the slurry concentration was
23.47 kg solid/m^3 filtrate. Calculate the resistances of cake and
membrane. Data given as t = time in seconds and V = volume of filtrate
in m^3.
Table : see figure 3
3. (10%) A water vapor-air mixture having a dry bulb temperature of 60 degree
C is passed overa wet bulb thermometer and the wet bulb temperature
is found to be 29.5 degree C. What is the humidity of the mixture?
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Figure 1 : http://ppt.cc/ICfR
Figure 2 : http://ppt.cc/DeGH
Figure 3 : http://ppt.cc/jmVr
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