4 replies to this topic

[wafasaleem]

Hello friends,

 

I work as an intern for a natural gas plant. In the ethylene glycol regeneration section, we found recently that the Fe content of the EG entering and exiting the carbon filter is around 4.7-4.8 ppm, which gave the same reading for 2-3 months. There is no foaming issues in the contactor or still. The filter bed was changed 4 months back, which is usually replaced every 6 months.

 

Is there something to worry about this? If there is some corrosion in the pipelines, there would be a gradual increase in the Fe conc., which we didn't find. Do we need to do BTEX test? I don't think that is necessary.

 

Please help me as I am new to the industry and does not have much experiences.

 

Regards,

[Art Montemayor]

Your natural gas process description is disturbing or difficult to understand.

 

The compound ethylene glycol is used as a raw material for polyester fibers or as an aqueous anti-freeze solution.  It is also used as a cooling medium.  So what are you referring to when you state you are "regenerating" it?  How do benzene, toluene, ethylbenzene and xylene (Btex) get involved in this?

 

Are you mistaking Triethylene Glycol (used as a dehydration agent for natural gas) with ethylene glycol?   If so, lets get specifically accurate in order to avoid total confusion.  

[wafasaleem]

 

hello art,

 

we are sweetening the raw gas and removing the hydrocarbons by dehydration to meet the sales gas spec. As such, in the dehydration unit, ethylene glycol(not teg) is injected to avoid hydrate formation. This ethylene glycol is being regenerated. Now I hope the question is clear. It is a vendor who suggested to conduct the BTEX test.

 

regards,

wafa

[Napo]

Wafasaleem,

 

We have a gas dehydratation system with MEG (80%), I send the control parameters for your reference.

 

Also you can review the book: Gas Dehydration Field Manual by M.Stewart, K. Arnold, this is an excellent reference.

 

You don´t need the BTEX test.

 

Napo.

Attached Files

•  Gas dehydration system with MEG.pdf   67.56KB   25 downloads

Edited by Napo, 27 February 2017 - 01:12 PM.

[wafasaleem]

Wafasaleem,

 

We have a gas dehydratation system with MEG (80%), I send the control parameters for your reference.

 

Also you can review the book: Gas Dehydration Field Manual by M.Stewart, K. Arnold, this is an excellent reference.

 

You don´t need the BTEX test.

 

Napo.

 

Napo,

Thank you very much. Hope that would be helpful.

Regards