11. A pipeline with the gas composition below has inlet pipeline conditions of 195F and 1,050 psia. The gas flowing through the pipeline is cooled to 38F by the surrounding water. The gas also experiences a pressure drop to 950 psia. Gas exits the pipeline at a rate of 3.2 MMscf/D. The pipeline produces condensate at a rate of 25 B/D, with an average density of 300 lbm/bbl and an average molecular weight of 90 lbm/Ibm mol. Produced free water enters the pipeline at a rate of 0.25 B/D. Find the rate of methanol injection that will prevent hydrates in the pipeline for a natural gas composed of (in mole percent): 71.60% methane 4.73% ethane 1.94% propane 0.79% n-butane 0.79% n-pentane 14.19% carbon dioxide 5.96% nitrogen [Hint: The basis for these calculations is 1.0 MMscf/D. Methanol will exist in three phases: Water; Gas; Condensate. The steps in the solution are: Calculate hydrate formation conditions using the gas gravity chart. b. Calculate the wt% MeOH needed in the free-water phase. Calculate the free (produced and condensed) H2O/MMscf of natural g? d. Calculate the methanol needed in the aqueous phase. Calculate the methanol lost to the gas phase. f. Calculate the methanol lost to the liquid hydrocarbon phase. Sum the amounts in steps 4, 5, and 6 for the total methanol needed.] , a. C. e