RTI International, partnered with Creare and Mohammed VI Polytechnic University, is developing two types of advanced adsorbent materials—metal-organic frameworks (MOFs) and phosphorous dendrimers (P-dendrimers)—for direct air capture (DAC) of carbon dioxide (CO2). The sorbents are being synthesized, characterized, and optimized to achieve high CO2 capacity at very low CO2 partial pressures, high swing capacity, improved mass and heat transfer, and long operational life at low cost.