1. What conditions would tend to favor methanol inhibition regardless of the economics of the inhibitors themselves? 2. What are the advantages and disadvantages of ethylene glycol as an inhibitor? 3. Where should an inhibitor be injected in a process? 4. What are the considerations for the amount of inhibitor to be used? 5.50 MMscf/d of sweet natural gas stream leaves the wellhead at 1500 psia and 100F is saturated with water and has a gravity of 0.6 relative to air. It reaches a gas plant at 1200 psia and 30F. The associated condensate production is 10 bbl/MMscf. The condensate weighs 275 lb/bbl and has a MW of 140. Determine: a) The temperature when hydrate would be formed if no inhibitor is injected. b) The total injection rate (lb/day) of 100% methanol needed to avoid hydrate formation at downstream conditions. c) Injection rate of 80 wt% EG inhibitor. 6. Use ProMax to carry out the following calculations for a 100 MMSCFD gas stream at 100 F & 1,000 psia containing 90 mole % C1,8 % C2 & 2% C3 and saturated with water, a) Calculate hydrate formation Tat 1,000 psia (or another if necessary) b) Add 10% H2S (on a dry basis) to the gas and repeat the calculation c) For the saturated gas mixture in (a) calculate the amount of MeOH (50 F & 1,000 psia) required to inhibit hydrate formation at 50 F