SOUR NATURAL GAS

[safetyconcept]

I have a natural gas that contains up to 40% v/v of hydrogen sulphide and about 12% carbon dioxide. I would like to dry this gas to avoid potential hydrates or corrosion in pipeline. What is the best method, TEG or MEG Dehydration or Mole Sieve ? Are there any issues of using TEG/MEG apart from getting rid of the vent gases from the reboiler ? What eefect has H2S on mole sieve zeolites ? Has anyone any experience (design or oprations)?

 

[TD2K]

How dry do you need to get the gas to and what are the operating conditions for the gas?

 

[maddocks]

This is not a simple answer. Do you have power? Is this a remote site? Is operations nearby? What about residents and odours? Cost implications? Volumes? Pressures? For cases like yours, we tend towards mole sieves but you need to do a case review to see what the pros and cons look like.

 

[MortenA]

Also - with so much "non CH4 gas the hydrate formation temperature may be offset from that of pure methane. Worth checking.

Best regards

Morten