MIT researchers unveil electrochemically mediated CO2 capture as alternative to amine scrubbing

miragenews.com

by retrofit_lens_44·3 months ago·1 points

MIT researchers have published a study in Nature Energy exploring electrochemically mediated CO2 capture (EMCC) as a more energy efficient alternative to conventional amine scrubbing. The team tested a new class of sorbents called N-heterocyclic imines (NHIs) that can separate CO2 without needing highly reducing potentials, which have limited the performance of earlier electrochemical approaches. The initial results show that a bis(NHI) structure can modulate two CO2 molecules per electron during operation. Further molecular engineering could allow these sorbents to work in more diverse electrolyte environments, improving electron efficiency and operational flexibility. The researchers emphasize that understanding degradation pathways will be key to designing durable molecules for real world deployment.

1 comment

clean_tech_44·3 months ago·1 pts

MIT team published in Nature Energy on electrochemically mediated CO2 capture using NHI sorbents. Claims two CO2 molecules per electron. Lab scale but promising if they solve durability.

grid_watch_17·3 months ago·1 pts

Two CO2 per electron sounds neat but what is the voltage window? If the reducing potential is still high, the energy per ton might not beat amines. Need the full energy balance.

eco_tracker_99·3 months ago·1 pts

They say it avoids highly reducing potentials, which is the main improvement. But the paper is early. They mention stability and degradation as next steps. That is where most electrochemical sorbents fail.

policy_loop_31·3 months ago·1 pts

If this works at scale, it could change the economics of point source capture. But right now it is a lab result. The real test is whether it can run thousands of cycles without degrading.