Testing of High-Pressure Gas-Liquid Separation Membranes for Global Energy and Process Markets
As an ISO/IEC 17025 accredited laboratory, we deliver a rigorous testing of high-pressure gas-liquid separation membranes that verifies separation efficiency, mechanical integrity under differential pressure, chemical durability, and long-term operational stability. Our testing of high-pressure gas-liquid separation membranes program supports manufacturers and exporters of hollow fiber, flat sheet, and spiral-wound membrane contactors used in natural gas processing, carbon capture, hydrogen purification, and petrochemical dehydration who must demonstrate compliance with ASTM, ISO, and EN standards across the European Union, North America, the Middle East, and Asia. Every test is conducted under our CNAS-accredited quality system, producing reports accepted by notified bodies, engineering contractors, and end-user operators worldwide.
Product Samples We Regularly Test in Our High-Pressure Gas-Liquid Separation Membrane Program
- Hollow fiber membrane contactors — for natural gas dehydration, CO2 removal, and flare gas recovery at pressures up to 100 bar
- Flat sheet and spiral-wound membrane elements — for high-pressure acid gas separation and offshore platform gas conditioning
- Ceramic and metallic composite membranes — for high-temperature and chemically aggressive gas-liquid separation in refinery and syngas applications
- Polymeric asymmetric and thin-film composite membranes — polysulfone, polyimide, and PTFE-based materials for sour gas service
- Membrane modules with integrated permeate sweep and vacuum functionality — for enhanced mass transfer and deep dehydration
- Prototype and pilot-scale high-pressure membrane cartridges — for field trial validation and scale-up testing
Gas Permeation and Separation Performance Testing
- Single-gas permeance and ideal selectivity per ISO 15105-1 and ASTM D1434 — the membrane is exposed to individual gases at controlled upstream pressure and temperature, and the downstream flow rate is measured to calculate the permeance of each gas, providing the ideal separation factor that characterizes the membrane material's intrinsic selectivity.
- Mixed-gas separation factor and stage cut determination per customer and research protocols — a binary or multi-component gas mixture representative of the field gas composition is fed to the membrane module at rated pressure, and the retentate and permeate compositions are analyzed by gas chromatography to determine the actual separation performance under realistic operating conditions.
- Pressure ratio and driving force optimization — the effect of feed-to-permeate pressure ratio on recovery and product purity is mapped to define the operating envelope and to support process simulation using software such as Aspen HYSYS or custom membrane models.
- Product purity, recovery rate, and methane slip measurement — for natural gas upgrading and biogas purification, the CH4, CO2, and H2S concentrations in the product and waste streams are continuously monitored to verify that contractual gas quality specifications are met.
Liquid Intrusion, Wetting Resistance, and Bubble Point Integrity Testing
- Liquid entry pressure and hydrophobic stability per ISO 2942 and ASTM F316 — the membrane is wetted and pressurized with a test liquid, and the pressure at which liquid penetrates the membrane pores is recorded. This measurement defines the maximum allowable trans-membrane pressure before the gas-liquid interface is lost, a critical safety and performance parameter for gas dehydration membranes.
- Critical wetting tension and contact angle per ASTM D5946 and ISO 15989 — the surface energy of the membrane is characterized by sessile drop or Wilhelmy plate methods to verify that the membrane maintains its hydrophobic or oleophobic character under high-pressure conditions where condensation or aerosol carryover may occur.
- Bubble point and pore size distribution per ASTM F316 and ISO 4003 — the minimum pressure at which a continuous gas stream is forced through the liquid-filled membrane is measured to determine the largest pore diameter and to verify the absence of defects that would compromise the gas-liquid separation barrier.
- Gas breakthrough pressure with real liquid phases — the membrane is exposed to a gas stream saturated with water or hydrocarbon vapors at high pressure, and the differential pressure is increased until liquid phase penetration is detected, providing a direct measurement of the membrane's resistance to wetting in field conditions.
High-Pressure Mechanical Integrity and Burst Testing for Gas-Liquid Separation Membranes
- Hydrostatic and pneumatic pressure resistance per ASTM D1599 and ISO 1402 — the membrane module is pressurized with water or nitrogen at a rate of 1.5 times the maximum allowable working pressure for a specified hold duration, with zero visible leakage or plastic deformation permitted to demonstrate the structural safety margin.
- Cyclic pressure fatigue and pulse endurance testing — the membrane is subjected to repeated pressure cycles between atmospheric and rated pressure to simulate start-up, shutdown, and process upset events, with the separation performance and bubble point integrity reassessed at defined intervals throughout the test.
- Collapse and crush resistance of hollow fiber lumens — the external shell pressure is increased relative to the lumen pressure to determine the differential pressure at which the fibers collapse or the porous structure irreversibly densifies, ensuring the membrane can tolerate upset conditions where the permeate pressure inadvertently exceeds the feed pressure.
- Tensile strength and elongation of membrane films and potting compounds per ISO 527-3 and ASTM D638 — the base membrane material and the epoxy or polyurethane potting are tested for mechanical properties at ambient and high-temperature conditions to verify adequate strength for pressure containment and for resistance to differential thermal expansion.
Chemical Compatibility and Long-Term Stability Testing of High-Pressure Separation Membranes
- Accelerated chemical aging in sour and aggressive gas streams per ASTM D543 and ISO 175 — membrane samples are exposed to high-pressure gas containing H2S, CO2, and water vapor at elevated temperatures for defined durations, then the permeance, selectivity, and tensile properties are retested to predict the membrane service life in sour gas applications.
- Hot water and steam stripping resistance — the membrane is subjected to repeated hot water or low-pressure steam cycles at temperatures up to 120 °C to simulate regeneration procedures, and the mass transfer coefficient is tracked to detect any performance decline caused by pore swelling or plasticization.
- Resistance to corrosion inhibitors, hydrate inhibitors, and glycols — the membrane is immersed in methanol, mono-ethylene glycol, and corrosion inhibitor solutions typically injected upstream of the gas-liquid separation membrane, and the change in weight, hydrophobicity, and gas permeance is measured to verify compatibility with the full process fluid composition.
- Oxidative and free radical stability per ASTM D3895 and internal methods — exposure to oxygen, ozone, or free radical initiators at high partial pressures verifies that the membrane polymer does not undergo chain scission or crosslinking that would embrittle the material and shorten its field life.
Report Recognition and ISO/IEC 17025 Compliance
All test methods described in this testing of high-pressure gas-liquid separation membranes program are included within our ISO/IEC 17025 scope of accreditation. Our technical reports are accepted by European notified bodies under the Pressure Equipment Directive, by engineering, procurement, and construction contractors for gas processing plants, and by national oil company and independent operator technical authorities across the Middle East, North America, and Asia. Whether you require a complete qualification dossier for a new membrane module, a comparative performance evaluation of competing membrane products, or a root cause failure analysis of a field-returned unit, our laboratory provides the measurement accuracy and domain expertise that the global membrane separation industry demands.
