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MEG Recovery

Natural gas production leads more and more to the development of deep offshore gas projects under stringent conditions, with the associated risks of hydrate formation, leading to blocked flowlines and potential plant shutdowns.

Different solutions exist to avoid hydrate formation:

  • MonoEthylene Glycol (MEG) injection
  • Methanol (MeOH) injection
  • Low Dosage Hydrate Inhibitor (LDHI) injection
  • Heating and insulation of the flowlines
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Injection of MonoEthylene Glycol (MEG) at the wellhead is a widely spread solution for hydrate inhibition and guarantees continuous gas production.
The installation of a MEG regeneration and reclamation system is crucial to recover MEG suitable for re-use.

AdvaMEG®, Axens MEG Regeneration and Reclamation solution, proposes the most reliable response for this purpose. It uses a vacuum distillation and purification system protected by several patents, allowing the removal of water from the rich MEG but also all types of salts (monovalent & divalent salts) coming from reservoir and subsea system. The technology removes contaminants and enables high MEG recovery while minimizing waste effluents.

For each project, AdvaMEG® offers a tailor-made solution with high flexibility, optimizing scheme with specific features adapted to each feedstock. Thanks to its deep experience and knowledge in the field of MEG reclamation, Axens is able to advise on the most relevant scheme depending on project constraints such as compact modular units when space is limited, staged investment approach to reduce initial CAPEX and CO2 emission reduction.

For Each Constraint, an Adapted Scheme

Integrated Scheme

Thanks to the integrated scheme, water and salts are removed in the same unit operating under vaccum to produce a salt free lean MEG. Both monovalent and divalent salts are removed from the MEG without any additional divalent removal unit.

Conditioning

Contaminants removal from the entering rich MEG: 
- Hydrocarbons
- Acid gases
- Corrosion products
- etc

Reclamation

Vaporization of both MEG and water under vacuum to produce a concentrated slurry of salts.

Salts Removal

Monovalent and divalent salts removal from the concentrated slurry of salts using vertical basket type centrifuge to achieve high solids cake dryness with low MEG losses.

Overhead Regeneration

Water and MEG separation under vacuum to produce lean MEG at the required concentration and water with low MEG content.

Conventional Regeneration

This type of scheme is well adapted when no salts are present in the feedstock, for example during early life of a reservoir.
If a limited quantity of salts is expected, Axens can propose salt-robust regeneration design to handle them even if they are not removed.

Conditioning

Contaminants removal from the entering rich MEG: 
- Hydrocarbons
- Acid gases
- Corrosion products
- etc

Regeneration

Water and MEG separation slightly under pressure to produce a salty lean MEG at the required concentration and water with low MEG content.

Slip-Stream Scheme

For moderate salt content and large rich MEG capacity applications a slip-stream configuration can be proposed.
This scheme allows a partial removal of salts to produce a salty lean MEG, typically at 2% wt of salts.
It is also well adapted to a staged investment approach or for retrofit of conventional regeneration (pretreatment and reclamation sections are added when salts production starts).

Conditioning

Contaminants removal from the entering rich MEG :
- Hydrocarbons
- Acid gases
- Corrosion products
- etc

Chemical Pretreatment

Dedicated section designed to precipitate the divalent salts thanks to chemical injection. Then they are concentrated as a salt cake while minimizing the MEG losses.

Regeneration

Water and MEG separation slightly under pressure to produce a salty lean MEG at the required concentration and water with low MEG content.

Reclamation

MEG vaporization under vacuum to produce a concentrated slurry of salts.

Salts Removal

Monovalent salts removal using vertical basket type centrifuge to achieve high solids cake dryness with low MEG losses.

AdvaMEG®

History:
Originally developed by CCR Ltd, now exclusively licensed by Axens. AdvaMEG® is a pioneer technology with the 1st worldwide reference (1999, Gulf of Mexico, offshore).

Highlights:
AdvaMEG® benefits are supported by:

  • The experience of Axens as a process licensor as well as an engineering company delivering complete skid-mounted processing units, for both onshore and offshore applications.
  • Continuous improvement of its current know-how based on operating feedback results from its long-term R&D with IFPEN and close collaboration with key partners.
  • Selection of equipment and materials which have proven their reliability and high efficiency and are suitable for motions on floating support.

Industrially         
Proven Solution

> 99.5 %         
Highest MEG recovery

Patented         
Technology

Long-Term         
Operability & Reliability

Onshore and Offshore Project Approach:

  • Feasibility Stage
    Analysis of flow assurance study outputs, feasibility, scheme definition and conceptual study to optimize MEG regeneration and reclamation sizing.
  • Project Execution
    License supply, basic design, process engineering, detailed engineering, revamping studies, procurement, supply of complete processing units/modular turn-key units.
  • Start-up
    Assistance in pre-com/commissioning and start-up phases to secure unit performances. Experts on site to allow smooth transition from licensor to operators.
  • Operation
    After sales services and continuous end user support such as training, supply of spare parts, analysis and technical assistance.
Commercial Bulletin
Movie - Focus on integrated scheme

Modular Units

A modularization strategy offers superior benefits versus on-site manufacturing. During the last 40 years, Axens has supplied over 500 modular units, both onshore and offshore, providing tailor-made designs according to client project specifications.

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Customer Training

Designed for all Axens technologies, dedicated to operators & engineers, Axens offers customized training solutions to all our licensees, covering the whole range of Axens technologies.

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Technical Support & Performance Management

Axens is fully committed to be your partner and provide assistance and support during your project lifecycle, from conception to start-up & running operations.

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Digital Services & Applications

Axens' digital platform combines real-time data and digital solutions to optimize operations, reduce environmental impact, and lower costs while maximizing profitability. By delivering actionable insights and detailed performance reports, it enhances asset operation and performance for smarter, more efficient outcomes.

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Explore some

Resources

Video

Video Axens AdvaMEG® Technology - A safe, cost-effective and environmentally-friendly approach for MEG recovery applications.

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Technical article

Technical Article - Minimizing Flow-Assurance Issues With Cost-Effective MEG Regeneration And Reclamation Technology

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Insight

A South East Asia Offshore Showcase: MEG Reclaiming on a Floating Production Unit

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Insight

Modules: the Solution for a Successful Offshore Natural Gas Project

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More resources
Insight

A South East Asia Offshore Showcase: MEG Reclaiming on a Floating Production Unit

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Insight

Modules: the Solution for a Successful Offshore Natural Gas Project

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See all Insights
Technical article

Technical Article - Minimizing Flow-Assurance Issues With Cost-Effective MEG Regeneration And Reclamation Technology

Read more
See all Technical articles
Natural Gas
Video

Video Axens AdvaMEG® Technology - A safe, cost-effective and environmentally-friendly approach for MEG recovery applications.

Read more
See all Videos

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