KAIST succeeds in producing 50x more stable adsorbent

April 16, 2018

A KAIST research team developed a technology to increase the stability of amine-containing adsorbents by fifty times, moving one step further toward commercializing stable adsorbents that last longer.

Professor Minkee Choi from the Department of Chemical and Biomolecular Engineering and his team succeeded in developing amine-containing adsorbents that show high oxidative stability.

The capture of the greenhouse gas carbon dioxide is an active ongoing research field, and some of the latest advancements point to amine-containing adsorbents as an efficient and environment-friendly way to capture carbon dioxide. However, existing amine-containing adsorbents are known to be unstable under oxidation, which chemically breaks down the adsorbent, thereby making it difficult to rely on amine-containing adsorbents for repeated and continued use.

The researchers have discovered that the miniscule amount of iron and copper present in the amine accelerate the oxidative breakdown of the amine-containing adsorbent. Upon this discovery, they proposed the use of a chelator substance, which essentially suppresses the activation of the impurities.

The team demonstrates that the proposed method renders the adsorbent up to 50 times slower in its deactivation rate due to oxidation, compared to conventional polyethyleneimine (PEI) / silica adsorbents. Figure 1 illustrates the superior performance of this oxidation-stable amine-containing adsorbent (shown in black squares), whose carbon dioxide-capturing capacity deteriorates by only a small amount (~8%). Meanwhile, the carbon dioxide-capturing capacity of the PEI/silica adsorbent (shown in red diamonds) degrades dramatically after being exposed to oxidative aging for 30 days.

This stability under oxidation is expected to have brought amine-containing adsorbents one step closer to commercialization. As such, first author Woosung Choi describes the significance of this study as "having brought solid carbon dioxide adsorbents to commercializable standards". In fact, Professor Choi explains that commercialization steps for his team's carbon dioxide adsorbents are already underway. He further set forth his aim to "develop the world's best carbon dioxide capture adsorbent".
This research, led by the PhD candidate Woosung Choi, was published online in Nature Communications on February 20.

The Korea Advanced Institute of Science and Technology (KAIST)

Related Stability Articles from Brightsurf:

Solar hydrogen: let's consider the stability of photoelectrodes
As part of an international collaboration, a team at the HZB has examined the corrosion processes of high-quality BiVO4 photoelectrodes using different state-of-the-art characterisation methods.

Extra stability for magnetic knots
Tiny magnetic whirls that can occur in materials - so-called skyrmions - hold high promises for novel electronic devices or magnetic memory in which they are used as bits to store information.

Scientists boost stability and efficiency of next-gen solar tech
Researchers from the Okinawa Institute of Science and Technology Graduate University (OIST) have created next-generation solar modules with high efficiency and good stability.

Highest peak power and excellent stability
Optical amplifiers based on chirped pulse amplification (CPA) are used to generate high intensity pulses.

More ecosystem engineers create stability, preventing extinctions
Biological builders like beavers, elephants, and shipworms re-engineer their environments.

Environmental conditions found to affect stability of virus that causes COVID-19
A new study led by Marshall University researcher M. Jeremiah Matson found that environmental conditions affect the stability of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in human nasal mucus and sputum.

The mystery of visual stability
We move our eyes several times per second. These fast eye movements, called saccades, create large image shifts on the retina -- making our visual system work hard to maintain a stable perceptual world.

Functional polymers to improve thermal stability of bioplastics
One of the key objectives for contemporary chemistry is to improve thermomechanical properties of polymers, in particular, thermostability of bioplastics.

New role assigned to a human protein in transcription and genome stability
DNA-RNA hybrids, or R loops, are structures that generate genomic instability, a common feature of tumor cells.

NIST researchers boost microwave signal stability a hundredfold
Researchers at the National Institute of Standards and Technology (NIST) have used state-of-the-art atomic clocks, advanced light detectors, and a measurement tool called a frequency comb to boost the stability of microwave signals 100-fold.

Read More: Stability News and Stability Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.