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Gas Absorption

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Equipment

Equilibrium-based Contacting Device

Packed Bed

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Countercurrent Gas Absorption

V1Y1y1V

VN+1YN+1yN+1

V

L0XoxoL

LNXNxN

L

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OMB:

VN+1 + Lo= V1 + LN

Component Balance:

+1 1 = 0 +1

1 +1 1

1 1 = 1

1

Operating Line:

1

=

0

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Absorber vs Stripper

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Minimum Absorbent Rate

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Geankoplis 10.6.3

A tray tower is to be used to remove 99% of

the ammonia from an entering air stream

containing 6 mole% ammonia at 293K and

1.013 x 105Pa. The entering pure water flow

rate is 188 kg water/h-m2 and the inert air

flow is 128 kg air/h-m3. Calculate the number

of theoretical trays needed.

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Fin.