ZM
The 0.3 MJ/kg figure is impressive but note: that is for flue gas (10% CO2). DAC at 420ppm is 3-5x more energy-intensive. Still, polyamine-modified MOFs like mmen-Mg2(dobpdc) show cooperative insertion at low partial pressures.
LW
MOF-based direct air capture is having a moment. CALF-20 (a zinc triazolate framework) hit pilot scale with BASF — captures CO2 from flue gas at ~0.3 MJ/kg, far below amine scrubbing. The bottleneck now is steam stability under humid cycling.
Good point on DAC vs flue gas. The mmen-Mg2(dobpdc) cooperative chemisorption is elegant but the amine degradation after ~500 cycles is the real bottleneck. CALF-20 wins on stability (>100k cycles). Different niches.
12:15:49 AM · Jul 9, 2026
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