Natural gas has become the dominant source of electricity in the United States, and technologies capable of efficiently removing carbon dioxide (CO₂) from the flue emissions of natural gas–fired power plants could reduce their carbon intensity. However, given the low partial pressure of CO₂ in the flue stream, separation of CO₂ is particularly challenging. Taking inspiration from the crystal structures of diamine-appended metal–organic frameworks exhibiting two-step cooperative CO₂ adsorption, we report a family of robust tetraamine-functionalized frameworks that retain cooperativity, leading to the potential for exceptional efficiency in capturing CO₂ under the extreme conditions relevant to natural gas flue emissions. The ordered, multimetal coordination of the tetraamines imparts the materials with extraordinary stability to adsorption-desorption cycling with simulated humid flue gas and enables regeneration using low-temperature steam in lieu of costly pressure or temperature swings.

天然气已成为美国的主要电力来源，能够从天然气发电厂的烟道气排放中有效去除二氧化碳（CO ₂）的技术可以降低其碳强度。然而，由于烟道流中的CO ₂分压低，因此分离CO ₂尤其具有挑战性。从显示出两步协同CO ₂吸附的二胺附加金属有机骨架的晶体结构中获得启发，我们报告了一系列坚固的四胺官能化骨架，这些骨架保留了协同作用，从而导致了捕获CO _2的出色效率在与天然气烟道排放有关的极端条件下。四胺的有序多金属配位使该材料在模拟湿烟气的吸附-解吸循环中具有非凡的稳定性，并能够使用低温蒸汽代替昂贵的压力或温度波动进行再生。