Exhibition & Conference

13-16 September 2021

Singapore EXPO, Singapore

Technical Programme

Laurent Normand

Regional Sales Manager, Process Licensing

Axens Solutions

16:30 - 17:00

Thursday, 19 September 2019

T3.10 AGAT: Get Ahead in Acid Gas Treating - Case Study

Amine based Natural Gas Sweetening is a well – known mature technology however fairly expensive and which becomes increasingly expensive when the feed acid gas content increases.  Better technology to reach tight specifications with the best economical solutions regarding CAPEX and OPEX is therefore required.

AXENS has a huge experience in natural gas treatment from the benefit of Prosernat’s acquisition, and is now offering a novel advanced technologies to decrease cost of acid gas treatment units through the solvent called AGAT. The research work has has been carried out  by AXENS’s mother company: IFP Energies nouvelles.

AGAT technology is a new process established from a new amine-based solvent, which offers competitive advantage over commercially available solvents with a high reduction of solvent flow rate and operating cost with equivalent operability characteristics: foaming, degradation, corrosion….

AGAT 200 solvent shows higher acid gas (H2S and CO2) absorption capacity as well as higher mass transfer rate of CO2 and COS, than conventional piperazine-activated methyldiethanolamine (MDEA) solvent. Such advantage allows reducing solvent flow rate, absorber size and reboiler duty in order to propose more competitive design in term of CAPEX and OPEX.

AGAT 200 solvent swapping can also be of particular interest in revamping an existing unit, in order to increase the treated gas capacity, or to improve absorption performances.

The technology is well proven at lab scale and has been successfully demonstrated in a plant processing up to 250 Nm3/h of gas mainly composed of methane and CO2, confirming the predictivity of the mass-transfer rate-based simulator developed by IFPEN.

This paper focus on the competitive advantage of AGAT solvent for two potential industrial case studies for CO2 removal, regarding OPEX and CAPEX gain in comparison to conventional piperazine-activated methyldiethanolamine (MDEA) solvent.

One case study focus on achieving pipeline specification (2.0% CO2) from a rich CO2 raw gas (over 5% CO2) at pressure over 60 bars.

The other case study focus in achieving LNG specification (50 ppm CO2) from a raw gas containing moderate CO2 content (about 2%) at conventional pressure (about 50 bar).

The gain in term of solvent flow rate is in the range 15 – 40%, with savings on CAPEX in the range 10 – 20% and up to 30% regarding OPEX.