Question

4.9 An open, shallow reservoir of a viscous, nonvolatile liquid is located inside a petrochemical plant. We wish to evaluate the unsteady absorption of H2S by the liquid if this gas is released to the atmosphere. The scenario considered is the sudden increase of the concentration of H2S in the air over the surface of the reservoir from zero to 0.1 mol%. If this level of contamination is maintained for 30 days, a. What is the minimum concentration of H2S in the liquid of the reser- voir at the end of this period? b. What is the maximum concentration? Additional information: Mass transfer inside the reservoir occurs by diffusion only. The reservoir can be approximated to a slab 0.1 m deep with a surface 200 m × 200 m. Convective mass transfer in the air flowing over the reservoir can be considered fast. The diffusivity of H?S in the liquid at 298 K and 1 atm (reservoir conditions) is 2 x 10?? m²/s, and the partition coefficient is K = 0.4 (ratio between molar concentration of H?S in air and molar concen- tration in the liquid).

          4.9 An open, shallow reservoir of a viscous, nonvolatile liquid is located
inside a petrochemical plant. We wish to evaluate the unsteady absorption
of H2S by the liquid if this gas is released to the atmosphere. The scenario
considered is the sudden increase of the concentration of H2S in the air
over the surface of the reservoir from zero to 0.1 mol%. If this level of
contamination is maintained for 30 days,
a. What is the minimum concentration of H2S in the liquid of the reser-
voir at the end of this period?
b. What is the maximum concentration?
Additional information:
Mass transfer inside the reservoir occurs by diffusion only. The
reservoir can be approximated to a slab 0.1 m deep with a surface
200 m × 200 m. Convective mass transfer in the air flowing over the
reservoir can be considered fast.
The diffusivity of H?S in the liquid at 298 K and 1 atm (reservoir
conditions) is 2 x 10?? m²/s, and the partition coefficient is K = 0.4
(ratio between molar concentration of H?S in air and molar concen-
tration in the liquid).

4.9 An open, shallow reservoir of a viscous, nonvolatile liquid is located
inside a petrochemical plant. We wish to evaluate the unsteady absorption
of H2S by the liquid if this gas is released to the atmosphere. The scenario
considered is the sudden increase of the concentration of H2S in the air
over the surface of the reservoir from zero to 0.1 mol%. If this level of
contamination is maintained for 30 days,
a. What is the minimum concentration of H2S in the liquid of the reser-
voir at the end of this period?
b. What is the maximum concentration?
Additional information:
Mass transfer inside the reservoir occurs by diffusion only. The
reservoir can be approximated to a slab 0.1 m deep with a surface
200 m × 200 m. Convective mass transfer in the air flowing over the
reservoir can be considered fast.
The diffusivity of H?S in the liquid at 298 K and 1 atm (reservoir
conditions) is 2 x 10?? m²/s, and the partition coefficient is K = 0.4
(ratio between molar concentration of H?S in air and molar concen-
tration in the liquid).

Added by April S.

Question

Please give Ace some feedback