where:
• A = the absorption factor
• a = mole fraction of H 2 S in gas feed
• R = mole MEA/mole H 2 S absorbed
• r = residual H 2 S in lean MEA solution (mole H 2 S per mole MEA)
• pp = partial pressure of H 2 S in rich solution, psia
• P = system pressure (tower pressure), psia
Step 6. Solve for A. Then solve the equation given in Step 1 for N. Divide N by an
efficiency factor (usually about 15 % for absorbers) to determine actual number
of trays.
An example calculation is given in the Appendix of this chapter, along with
other applicable charts and tables.
Fig. 2 (a, b) Partial pressure of H 2 S in 15 and 20 w% MEA solution
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D.S.J. Jones and S.A. Treese
• A = the absorption factor
• a = mole fraction of H 2 S in gas feed
• R = mole MEA/mole H 2 S absorbed
• r = residual H 2 S in lean MEA solution (mole H 2 S per mole MEA)
• pp = partial pressure of H 2 S in rich solution, psia
• P = system pressure (tower pressure), psia
Step 6. Solve for A. Then solve the equation given in Step 1 for N. Divide N by an
efficiency factor (usually about 15 % for absorbers) to determine actual number
of trays.
An example calculation is given in the Appendix of this chapter, along with
other applicable charts and tables.
Fig. 2 (a, b) Partial pressure of H 2 S in 15 and 20 w% MEA solution
510
D.S.J. Jones and S.A. Treese