課程名稱︰分離程序
課程性質︰化工系大三必修
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）︰2020.06.18
考試時限（分鐘）：100 min
試題 :
Closed Book:
1.(30%)
Explain following terms briefly.
1) Asymmetric membrane
2) Molecular weight cut off and rejection coefficient
3) Psychometric ratio
4) Concentration polarization
5) Percentage relative humidity and percentage humidity
6) Cation exchange membrane
7) Polymorhism in crystallization
8) Enantiotropic and monotropic in crystallization
9) Critical moisture in drying
10) Reynold analogy
2.(10%)
Please derive the so-called Langmuir isotherm with clear assumptions.
3.(10%)
What are the possible mechanisms of membrane fouling? And what are the ways to
eliminate or reduce fouling?
4.(10%)
Please discuss the difference between primary nucleation and secondary
nucleation from the point of solubility, rate, size distribution, and
controllability.
Open book:
1.(24%)
The attach chromatographic results indicated the effect of different injected
sample volumes. Please explain (1) what causes the distortion of the peaks and
(2) why the distortion almost invisible for small volume of samples and (3)
what type of isotherm that you expect.
2.(26%)
A mixture containing 50% acetone and 50% water is to be contacted with an equal
amount of MIK, (a) what fraction of the acetone can be extracted in a
single-stage process? (b) what fraction of the acetone could be extracted if
the fresh solvent were devided into two parts and two successive extraction
used.