Tokyo Metropolitan University: Discovered an absorbent substance that is 10 times faster: Direct air recovery (DAC)
Tokyo Metropolitan University:
We have discovered an absorbent substance that captures CO2 in the air 10 times faster.
Direct Air Recovery (DAC):
The world is aiming for a carbon-free society.
One of the promising technologies is direct air recovery (DAC), which collects and separates CO2 from the air.
Achieves up to 10 times absorption efficiency:
Can recover CO2 in the air,
Of the currently used CO2 capture substances,
We have developed a method that can achieve up to 10 times the absorption efficiency.
If put into practical use, most of the CO2 emitted by humans will be recovered by 2050.
This technique is really a coincidence.
Nihon Keizai Shimbun
https://www.nikkei.com/article/DGXZQOUC213KJ0R20C21A7000000/
[Outline of new technology]
Carbon dioxide absorption and release system
Carbon dioxide absorption and release system using phase separation.
From gas
Not only can a wide range of concentrations of carbon dioxide be removed at room temperature,
Adsorbed carbon dioxide can be generated and recovered at low temperature.
In addition, this system can be used any number of times.
Carbon dioxide can be recovered with higher efficiency and lower cost than the conventional method.
[Comparison with conventional technology / competitive technology]
Conventional carbon dioxide absorption and release systems
Increasing the rate of carbon dioxide absorption raises the generation temperature,
When the temperature at which carbon dioxide is generated is lowered, the absorption rate is lowered.
Absorption and release could not be practically compatible.
This technology solves this problem.
When the absorption rate is increased, it can be released at a low temperature.
[Characteristics of new technology]
It can release carbon dioxide at a low temperature of 100 ° C or less and can be used repeatedly.
Even 400ppm carbon dioxide can be absorbed with an efficiency of 90% or more and can be used repeatedly.
A base catalyst can be added to increase the rate of carbon dioxide release.
[Assumed use]
Carbon capture and storage (CCS) technology, carbon capture and storage (CCU) technology
A device that recovers carbon dioxide from exhaust gas from factories, etc.
Equipment that recovers carbon dioxide from the air (Direct air capture, DAC)
2021 Tokyo Metropolitan University
https://shingi.jst.go.jp/kobetsu/tmu/2021_tmu/tech_property.html
New technology for greenhouse gas reduction
Seiji Yamazoe, Professor, Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
July 8, 2021