+1 vote

Effect of methanol on gas dehydration

asked May 7, 2014 in Process by stevemc01 (430 points)
Produced gas contains significant amount of methanol during startup used for Hydrate remidiation. Could someone please share some info on effect of methanol on gas dehydration (TEG) unit?

2 Answers

+1 vote
answered May 8, 2014 by RichS29 (4,320 points) | selected Jul 17, 2015 by odadmin
Best answer

Methanol injected at wellhead as hydrate inhibitor can pose the following problems to the glycol dehydration unit:

  • add additional reboiler heat duty
  • Slugs of liquid methanol can cause flooding in the absorber
  • Methanol will add to the still vapor load which can cause flooding and hence cause glycol losses by entrainment
  • Methanol vapor vented with water vapor from regeneration unit is hazardous and should be removed or vented to a lower non hazardous concentrations
0 votes
answered Jul 17, 2015 by odadmin (21,030 points)
Methanol vapor vented to the atmosphere with the water vapor from regeneration system is hazardous.