A TEG contactor regenerator unit is used for continuous dehydration of a natural gas mixture flowing at 75MMscfD. The TEG regenerator unit is working at 760mmHg absolute pressure while maintaining the reboiler temperature at 310oF. The natural gas enters the TEG contactor unit at (100+2x)F and at 1,000 psia; where x is the last digit of your ID. For example, if your QU ID ends with 5, then natural gas enters the column at 110F. my id ends number 7

a) If the contact temperature (top of the column) is maintained at 100oF, what is the dew point depression and how much water is removed?

b) If the reboiler temperature is the only parameter that can be controlled, what should be the reboiler temperature to obtain marketable gas with 4 lbm H2O per MMscf for the treated gas.