Action Items:

You are looking at a multistage design using anywhere from one to ten equilibrium

stages. Please determine how much water per kmol of gas is required to clean the

gas to less than $0\mathrm{.}04\%H_{2}S$ for each case $(N=1,N=2,$dotsN$=10)$ under the following

conditions:

The process occurs at $30C$ and $P=10$ atm. Assume that $H_2$ is insoluble in

water and that $H_{2}O$ is non$-$volatile.

a$)$ Use a robust equilibrium and mass balance approach

b$)$ Use the Kremser$-$Souder$-$Brown equation

The process occurs at $30C$ and $P=20$atm. Assume that $H_2$ is insoluble in

water and that $H_{2}O$ is non$-$volatile.

a$)$ Use a robust equilibrium and mass balance approach

b$)$ Use the Kremser$-$Souder$-$Brown equation

The process occurs at $20C$ and $P=20$ atm. Assume that $H_2$ is insoluble in

water and that $H_{2}O$ is non$-$volatile.

a$)$ Use a robust equilibrium and mass balance approach

b$)$ Use the Kremser$-$Souder$-$Brown equation

For each set of conditions, plot the amount of water $($per kmol of gas$)$ vs the number

of stages for both approaches on the same plot $(3$ plots total$).$ Suggest a set of

conditions $(T,P)$ from the three above to use, and for that set of conditions, suggest

an optimal number of stages. Include quantitative $($numerical$)$ reasoning when

explaining your suggestion, along with any other non$-$quantitative reasons.

Discuss the assumptions made when doing the problem; do you think these are

good assumptions? Why or why not?