The tail gas from the Claus unit in Exercise 16.1 is the feed to a TGTU to remove remaining H2S. With the addition of this processing step, the overall sulfur recovery increases to 99.9%. What is the...

The tail gas from the Claus unit in Exercise 16.1 is the feed to a TGTU to remove remaining H2S. With the addition of this processing step, the overall sulfur recovery increases to 99.9%. What is the H2S recycle (lb-moles/day) (kg-moles/day) to the Claus unit? State any assumptions

Exercise 16.1

An amine unit treats 100 MMscfd (2.7 × 106Nm3/day) of natural gas (composition below) to remove essentially all the H2S and CO2 which are then sent to a Claus unit. The Claus feed is at 100°F (38°C) and 8 psig (0.6barg), and the unit removes 99.5% of the H2S as elemental sulfur. How much elemental sulfur (lbm) is produced per day?