Celazole® PBI is highly suited for producing carbon capture, pervaporation dehydration, and electrochemical cell membranes.

As a glassy thermoplastic, with exceptional thermal stability (427°C Tg), broad chemical resistance, and the ability to function as a proton-acceptor or proton-donor, PBI is uniquely suited for moving protons, hydrogen, and water. For these reasons, PBI is highly suited for H2/CO2 separation membranes, fuel cell proton exchange membranes, redox flow battery separator membranes, water purification membranes, and organic chemical pervaporation dehydration membranes — all for use at high temperature and pressure.

1,000 hours

PBI membranes have demonstrated commercially attractive H2/CO2 selectivity and tolerance to H2S, CO and steam in a 1,000 hour test at 225°C, 200 psi delta-P.


Over 600 hours of testing PBI hollow fiber membranes in air blown syngas test in 50kW-thermal CO2 capture demonstration at National Carbon Capture Center.

Projecting 90% CO2 capture from shifted syngas at 95% purity and 99% H2 recovery with less than 20% increase in the cost of electricity. Stable up to ~300°C and sulfur tolerant.

Pervaporation dehydration membranes

Manufacturers of organic chemicals and solvents, like tetrafluoropropanol, ethylene glycol and acetic acid, can benefit from the water selectivity and solvent resistant nature of Celazole® PBI-based pervaporation dehydration membranes to produce very pure chemicals at a fraction of distillation costs.


Carbon capture membranes

With high H2/CO2 selectivity and excellent high temperature stability, Celazole® PBI hollow-fiber membranes are being tested by the US Dept. of Energy to reduce power plant carbon emissions by 90%.

Fuel cell membranes

Thermal stability and broad chemical resistance allow Celazole® PBI PEM (proton exchange membranes) to operate at higher temperatures and increase operational efficiency.

Blue Hydrogen and Blue Ammonia

PBI hollow fiber membranes can be used in producing blue hydrogen and blue ammonia; capturing the CO2 generated by steam methane reforming or auto thermal reforming to yield a climate friendly pure hydrogen product stream.

Pervaporation dehydration membranes

Celazole® PBI-based membranes have been developed for the production and recycling of organic chemicals and solvents like ethanol, tetrafluoropropanol, ethylene glycol, and acetic acid which are characterized by energy intensive hard-to-distill azeotropic mixtures.

Learn how Celazole® PBI is revolutionizing polymer membranes


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