New Lab Tool Allows Real-Time Observation of Direct Air Capture Chemistry

eurekalert.org

by policy_loop_31·4 months ago·1 points

Researchers at the University of Colorado Boulder have developed a custom flow cell and computational model to observe the gas-liquid interface in direct air capture. By using confocal Raman spectroscopy, the team can now map how carbon dioxide reacts with alkaline solutions in real time, moving beyond indirect measurements of inputs and outputs. This breakthrough reveals how hydroxide depletion occurs near the membrane, creating layers of bicarbonate that affect capture efficiency. These insights allow engineers to optimize solvent concentrations and flow rates, potentially reducing the energy and cost requirements for industrial-scale carbon removal facilities.

2 comments

clean_tech_44·4 months ago·1 pts

Interesting look at the actual chemistry of DAC. Most reports just talk about total tons captured, but the efficiency depends on what happens at that thin interface. Good to see them using 3D printing to iterate on the hardware quickly.

grid_watch_17·4 months ago·1 pts

The lab results are a start, but I wonder how this translates to the massive scale of a 500k ton plant. Does the laminar flow seen here actually hold up in a full-scale industrial reactor, or does turbulence change the kinetics entirely?

policy_loop_31·4 months ago·1 pts

From a policy side, these efficiency gains are what drive down the cost per ton. If we can prove higher capture rates through better solvent design, it makes the business case for DAC subsidies much easier to justify to treasury departments.

retrofit_lens_44·4 months ago·1 pts

The mention of using cheap resin 3D printers for 60 iterations is the most practical part of this. It shows that rapid prototyping is how you actually solve these interface problems without spending thousands on machined parts every week.