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Membrane Hydrogen Separation

When a CO2 capture device is added to the existing hydrogen production process, the production cost of hydrogen has risen sharply. For this reason, various alternative technologies for separating hydrogen are being developed.

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Arstroma's CO2 capture technology can be used semi-permanently by using a sheet-type membrane applied with nano technology. Its CAPEX and OPEX costs are low because high temperature and high pressure conditions are not required to separate gases.

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In the Arstroma’s hydrogen production process using SMR process, PSA equipment is not required, which reduces CAPEX and lowers production cost, thereby lowering hydrogen production cost.

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In the case of hydrogen production that captures 85% of CO2 in an experiment using Arstroma's carbon capture facility, H2 can be produced at about 30% cheaper than the process using conventional PSA.

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Additional experiments are needed to find the optimal conditions for H2 production. The cost of H2 production can be further reduced by changing the size of the carbon capture system and membrane compositions and using catalysts.

Blue Hydrogen

Arstroma's technology highlights

  • Polarity-assisted gas separation technology applied with nano-ceramic coating

    • There is no need to worry about clogging because there are no pores.

    • It can be applied to dirty flue gases.

  • Membrane Separation technology, which is differentiated from the existing carbon capture technologies, and applied the membrane in the form of a sheet. – No need to replace membranes

  • Mambrane made by nano-material technology operates at high temperature, so it can be used semi-permanently, resulting in low maintenance costs.

  • Efficiently separate specific gases by applying “Surface Diffusion Mechanism” technology.

  • Because it is a modular system, it is easy to expand and the collection rate and purity can be adjusted by changing the connection method.

  • It does not require a toxic solvent and operates at room temperature and low atmospheric pressure – the initial installation is relatively simple and the CAPEX is low.

  • The membrane is made of very stable and durable material and has a long service life.

  • It is stable even at high temperature (200℃) and operates under ambient pressure, H2S 200ppm, 0.1μm to 10μm (SiO2, Al2O3, etc.) dust mixture. Can be used directly on flue gas without pretreatment.

  • Parallel and series combinations are possible depending on the required CO2 concentration and capture rate.

Arstroma's CC Pilot Plant Testing

In collaboration with Korea Electric Power Corporation (KEPCO), a carbon capture pilot plant was built in Dangjin, Korea and a three-year test was conducted. We have developed an optimal system to achieve the purity and capture rate of carbon dioxide, and the following are the test results.

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Technical overview

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  • Technology that separates and captures CO2 in combustion flue gas by the difference in permeation rate and molecular size using a separation membrane

  • Easy to upgrade in modular form, and easy to install in existing facilities as no separate heat source is required

  • The process is simple as it consists only of modules and compressors, and business diversification is possible without size and location restrictions

  • Environmentally friendly technology without the use of chemical and harmful substances, and energy-efficient process that does not require membrane regeneration.

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Test Result

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Membrane material and module

  • Intrinsic polymer membrane with permeance of 1153 GPU and selectivity of 10  - Establishment of mass production system with quality error < 3% 

  • Compact membrane module with membrane density of 400m2/m3

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