Developed Fluorine-Free MOF Capable of Capturing and Concentrating CO2

ROKI Corporation (Headquarters: Hamamatsu City, Shizuoka Prefecture; President and CEO: Takaya Shimada) has developed a fluorine-free Metal-Organic Framework (MOF) that can directly capture low-concentration CO2 from the actual atmosphere and be regenerated at a lower temperature (80°C) than conventional methods.

This technology has the potential to contribute to reducing energy consumption in Direct Air Capture (DAC) of CO2 from the air, and is expected to be applied to CO2 capture processes utilizing low-temperature heat sources such as industrial waste heat.

Key Points of This Release:

- Directly captures CO2 from the atmosphere (CO2 concentration: 400-500 ppm) - Concentrates captured CO2 to approximately 100%* - Fluorine-free design reduces environmental and safety compliance risks and regulatory risks - Regenerable at 80°C (lower temperature than conventional methods), enabling low-energy operation/waste heat utilization

Significance of the Technology:

In recent years, while interest and expectations have been growing for Direct Air Capture (DAC) technology, which efficiently captures low-concentration CO2 from the atmosphere for global warming countermeasures and carbon neutrality, the following challenges have been pointed out:

- High energy cost of capture - Performance degradation in high-humidity environments - Environmental and safety compliance of materials

The MOF developed this time, with its characteristic of being "regenerable at low temperatures (80°C)", is expected to enable lower energy operation than before, and has shown potential to contribute to solving these challenges.

Going forward, ROKI will proceed with evaluating the application of this material to equipment and verify its deployment for CO2 capture and concentration applications.

Developed Technology:

In evaluations using laboratory air, the following performance was confirmed:

After adsorption

After desorption

Outlet CO2 concentration reduced to the detection limit

Captured CO2 concentrated to approximately 100%

This demonstrates the possibility of not only capturing low-concentration CO2 but also recovering it as high-concentration CO2 with a view to supplying it to reuse processes.

* "Approximately 100%" means that under our evaluation and measurement conditions, the CO2 concentration was measured to be nearly 100%.

* Evaluation results are based on our evaluation conditions, and performance may vary depending on the actual usage environment and equipment specifications.

Atmospheric CO2 Capture Experimental Results CO2 Concentration Experimental Results

Technical Features:

Comparison Item

ROKI's Newly Developed MOF

Conventional MOF

Moisture Absorption

20 wt%

40 wt%

Material Design

Fluorine-free

Contains fluorine in raw materials

Regeneration Temperature

80°C~

120°C~

* Conventional CO2 adsorbent MOFs refer to fluorine-containing MOFs selected by ROKI as a comparison. * Each numerical value is a result obtained under ROKI's evaluation conditions. * Regeneration temperature is an indicator based on CO2 desorption behavior under ROKI's evaluation conditions.

CO2 Adsorption Isotherm MOF Cartridge (Developed Product)

Anticipated Application Areas:

This MOF is envisioned for the following applications:

Anticipated Application Sites

Application Image

Adsorbent for DAC Equipment

Utilization of CO2 captured by DAC for methanation or synthetic fuel production

Offices and Commercial Facilities

Creating comfortable indoor environments through CO2 concentration management, supporting intellectual productivity

Air Quality Control

Residential and Living Spaces

Air quality control for improved comfort and QOL through indoor CO2 concentration management

Enclosed and Semi-enclosed Spaces

CO2 concentration control in spaces where ventilation is restricted

CO2 Reuse Processes

Supply of captured and concentrated CO2 for chemicals, fuels, agricultural use, etc.

Future Development:

ROKI will promote the following development for the practical application of this material:

- Formulation assuming installation in actual equipment - Evaluation of long-term durability through repeated adsorption/desorption cycles - Evaluation of long-term stability in high-humidity environments - Performance evaluation using equipment modules - Verification of regeneration processes utilizing low-temperature heat sources

Going forward, ROKI will advance research and development with a view to joint verification and technological collaboration, leveraging its expertise in filtration and gas control technologies for the social implementation of CO2 capture and concentration technology.

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Overview of ROKI Corporation:

Name: ROKI Corporation (https://www.roki-jp.com)

Representative: Takaya Shimada

Location: 2396 Futamachi Futamata, Tenryu-ku, Hamamatsu City, Shizuoka Prefecture 431-3314

Business Activities: Development, manufacturing, and sales of automotive filtration equipment, fuel cell-related systems, and non-woven masks

Contact Information for Inquiries:

ROKI Corporation, New Business Division

Inquiry Desk: contact@roki-jp.com

Related Links:

Developed proprietary manufacturing technology for mass production and quality stabilization of MOFs using an aqueous synthesis process without organic solvents

(Press Release, June 10, 2026)

Related Keywords:

Metal-Organic Framework / Organic Metal Structure / PCP (Porous Coordination Polymer) / Metal-Organic Framework / Porous Material / Gas Adsorbent / Carbon Neutral / Decarbonization / Low Environmental Impact Process / Fluorine-Free MOF / Direct Air Capture (DAC) / CO2 Capture / CO2 Concentration / Low-Temperature Regeneration Adsorbent