DAC’s biggest cost isn’t the fan. It isn’t the building or the sorbent material. It’s the heat — specifically, the heat required to release the CO₂ you just captured so you can regenerate your sorbent and do it again.

Standard amine-based systems need north of 100°C for that regeneration step. Which means you’re burning energy — often natural gas — to run a machine designed to remove carbon. The irony writes itself.

That’s why a paper out of Chiba University caught my attention. Kondo et al. in Carbon (254:121405, 2026) describes a new class of CO₂ capture materials they call viciazites. The trick is in the molecular architecture: adjacent nitrogen groups in an N-N configuration that weaken how tightly the material binds CO₂. Weaker binding means you don’t need as much heat to break it loose. The desorption threshold drops below 60°C.

That number matters because industrial waste heat — the thermal energy that factories, data centres, and other facilities currently dump into the atmosphere unused — sits right in that range. Sub-60°C desorption potentially means you’re not burning extra fuel to run your DAC plant. You’re plugging into heat that was going to waste anyway.

Energy costs represent somewhere between 40–60% of DAC operating expenses depending on the design. If you can cut that component significantly by switching from combustion heat to recovered waste heat, you’ve addressed the biggest single lever in the cost structure.

A few caveats worth naming. This is lab-scale materials science, not an operating plant. The Carbon journal paper covers synthesis and characterization; it doesn’t give you a levelized cost of capture. There’s a long road between “interesting sorbent” and “cost-competitive DAC facility.” Materials that work beautifully at bench scale frequently run into durability, cycling, and scalability issues when you try to engineer around them.

But the directionality is right. The field has known for years that reducing regeneration temperature is one of the highest-leverage moves available for DAC economics. Most incumbent sorbents were designed for post-combustion capture at power plants — a different problem with different constraints. Building materials specifically optimized for low-temperature swing is the kind of first-principles work that eventually produces step changes.

Viciazites are early. Worth watching.