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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 12
1.
Which of the following is a suitable absorbent for removal of H2S from natural gas ?
Vetrocoke solution
Monoethanol amine (MEA)
Dilute
Hot water
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are
1
8
9
10
Answer: Option
Explanation:
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3.
Schimdt number and Lewis number for pure air at atmospheric conditions are respectively
< 1 and ≈ 1
1 and 0
>1 and ≈ 1
0 and ≈ 1
Answer: Option
Explanation:
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4.
Below is given an equilibrium moisture curve of a substance. State which regions represent free moisture and unbound moisture respectively.
II, III
II, IV
IV, III
IV, II
Answer: Option
Explanation:
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5.
Molecular diffusion is caused by the
transfer of molecules from low concentration to high concentration region.
thermal energy of the molecules.
activation energy of the molecules.
potential energy of the molecules.
Answer: Option
Explanation:
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