Direct air capture (DAC) has always been energy-hungry, but recent studies are pushing the field toward electrochemical regeneration instead of traditional heat. One approach uses a conductive graphene aerogel with proton traps, cutting the regeneration heat duty to 3.4 GJ per ton of CO2, less than half of conventional temperature swing systems. Another uses redox-decoupled electrolysis to regenerate alkaline solutions without diluting them, reporting three times better efficiency than prior work. A third study models coupling DAC with methanol production using solar and wind power across thousands of regions, showing cost and efficiency vary with local weather and water availability. These results are still lab or modeling outcomes. Durability is limited, with one sorbent losing 3.7% of uptake in the first 100 cycles, and air contactor design remains untested. Cost projections like $48 to $62 per tonne for a 4,000 ton-per-year plant are model outputs, not real plant data. All routes depend on low-carbon electricity to make sense. The real test is whether these electrochemical methods hold up over years of operation and scale to commercial size.
