Scalable and Cost-Effective Approach for Multiple NO2 Removal using the MOF-801 Framework
Yana N Albrekht1,2, Aleksandr A Efremov1,2, Dudari B Burueva1
1International Tomography Center SB RAS, Institutskaya Street 3a, Novosibirsk, 630090, Russia.
Small (Weinheim an Der Bergstrasse, Germany)
|May 30, 2025
Summary
This study presents a reusable zirconium-based MOF-801 framework for removing nitrogen dioxide (NO2) from gas mixtures. A novel regeneration method allows for repeated cycles of NO2 adsorption and removal, offering a practical environmental solution.
Area of Science:
- Environmental Chemistry
- Materials Science
- Chemical Engineering
Background:
- Rising atmospheric nitrogen dioxide (NO2) concentrations pose environmental risks.
- Existing sorbents often degrade due to NO2 reactivity, limiting their reusability.
- Developing stable and regenerable sorbents is crucial for effective NO2 removal.
Purpose of the Study:
- To develop a low-cost, scalable, and reusable MOF-801 framework for NO2 capture.
- To elucidate the NO2 sorption mechanism in MOF-801.
- To establish an effective regeneration method for cyclic NO2 removal.
Main Methods:
- In situ electron paramagnetic resonance (EPR) spectroscopy.
- Ex situ Attenuated Total Reflectance Fourier-Transform Infrared (ATR-FTIR) spectroscopy.
- Breakthrough measurements to assess NO2 sorption and regeneration.
Main Results:
- MOF-801 demonstrates effective NO2 sorption capacity.
- Sorption primarily involves the formation of nitrates and nitrites.
- A novel, low-cost chemical regeneration method successfully removes sorption products.
- MOF-801 maintains effectiveness in repeated NO2 adsorption-regeneration cycles.
Conclusions:
- Zirconium-based MOF-801 is a viable and regenerable sorbent for NO2 removal from dilute gas mixtures.
- The developed regeneration process enables multiple cycles of NO2 capture.
- This approach offers a promising solution for practical environmental applications in NO2 abatement.
