CYNARA Acid Gas Removal Membrane Systems | Schlumberger


Acid gas removal membrane systems

Embodied Carbon

Reduce embodied carbon by up to 50% compared with competing technologies

Emissions Reduction

Reduce CO2 emissions by 30%–100%

Decarbonize Your Operations
CYNARA acid gas removal membrane systems are part of our Transition Technologies portfolio. Learn about our collaborative approach and full field development solutions that drive high performance while reducing environmental impact throughout the life of your asset.
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How CYNARA systems support industry carbon intensity reduction goals

In FPSO applications, operators require a lighter topside structure to accommodate the skid-mounted CYNARA system. The large surface area of the hollow fibers results in a smaller overall system footprint, reducing the embodied carbon by up to 50%. Additionally, the lower quantity of hydrocarbons in the permeate stream decreases environmental impact.

Replacing or reducing amine solvents usage for acid gas removal eliminates or decreases greenhouse gas (GHG) emissions associated with pumping and heating solvents; CYNARA systems require no external energy or chemical storage and disposal facilities. When combining membranes for bulk removal of acid gas with solvents for the final stage, a 30%–50% reduction in emissions can be achieved. Capturing and reinjecting the acid gas into the subsurface leads to a 100% emissions reduction.

Cynara gas treatment facility
Cynara membrane system

CO2 and H2S removal with field-proven 99% average uptime

Industry-leading CYNARA acid gas removal membrane systems are based on selective permeation. When a natural gas stream containing acid gas (CO2 or H2S) passes through the membrane, the acid gas permeates at a faster rate than the natural gas components. The feed stream therefore separates into an acid-gas-rich, low-pressure permeated stream and a hydrocarbon-rich natural gas stream at sales-pipeline pressure.

CYNARA system membranes consist of hundreds of thousands of hollow asymmetric fibers grouped in bundles, with epoxy tube sheets on each end. Pressurized gas flows into the membrane case, where it contacts the fiber bundles and flows radially inward. As the gas traverses the bundle, acid gas selectively permeates into the low-pressure lumen of the fiber. The residual gas continues across the bundle into a central perforated tube.

Hollow-fiber membrane maximizes acid gas separation

Inherent advantages of CYNARA systems' unique membrane element design include the following:

  • Hollow fiber technology maximizes surface area per unit volume compared with competing membrane technology.
  • Double-ended permeate flow minimizes pressure drop down the lumen of the fiber, maximizing acid gas capacity as well as separation performance.
  • Vertical orientation of the hollow fibers combined with the central collection tube enables recovery of hydrocarbon liquids—a valuable product for many operators.

The proprietary processing mechanism of our hollow fiber membrane enhances acid gas removal capabilities in EOR and natural gas applications.

CYNARA acid gas removal membrane system

Learn how Process Live services can improve your membrane performance.

Input your system parameters, and an expert will help you maximize the performance and reliability of spiral-wound and hollow-chamber acid gas membrane process systems.

Input parameters and talk to an expert

More than 35 years of experience

We design and provide custom membrane pretreatment equipment, membrane systems, and field operation and support services worldwide. Solutions can address turnkey projects, gas dehydration, liquid hydrocarbons recovery, and acid gas separation. Ongoing experience enables recommending the most economical and reliable solution for you, whether it is a stand-alone membrane system or a hybrid system with other separation technologies. By centralizing related services, such as membrane manufacturing, R&D, testing, quality control, and engineering, we achieve quality, product availability, economies of scale, and a level of product responsibility that are impossible through an outside supplier or multiple suppliers.


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