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Pre- and post-combustion carbon capture with CarboLock hollow fiber contactor (HFC) technology

CarboLock hollow fiber contactor (HFC) technology is a hybrid solvent/hollow fiber process for CO2 separation and removal that greatly reduces the capital and operating costs for solvent-based gas clean-up technologies and has a much smaller size than conventional options. Developed by GTI and Air Liquide Advanced Separations, CarboLock can utilize either physical and chemical solvents or a mixture of solvents to capture CO2 with the hollow fiber contactor as a phase boundary between the gas and liquid, and the technology can dramatically improve process economics for all absorption systems.

In projects for the U.S. Department of Energy (DOE), the Illinois Clean Coal Institute (ICCI), and industry partners, laboratory and slipstream tests demonstrated the technology met specific gas separation performance targets for numerous applications, including pre-combustion carbon capture from syngas and post-combustion CO2 capture from flue gas.

The post-combustion application was evaluated in the field at a Midwest Generation coal-fired power plant in Romeoville, IL, that demonstrated greater than 90% CO2 removal with 97% CO2 product purity. With funding of $10 million provided by the U.S. Department of Energy/National Energy Technology Laboratory (DOE/NETL), GTI will test CarboLock at a 0.5-MWe (10 ton CO2/ day) scale on a flue gas stream at the National Carbon Capture Center. A techno-economic analysis study showed the estimated cost of CO2 capture using the hollow fiber contactor technology in conjunction with commercial and developmental solvents may reduce the cost of capturing carbon 25% below the current DOE benchmark cost of CO2 capture.