Science · 2021 · 978 citations · 55 references
Natural SciencesChemical EngineeringMaterials ScienceCombustionInorganic ChemistryMaterials ChemistryCarbon CaptureCarbon Dioxide RemovalCarbon SequestrationAdsorption-based CaptureCarbon Capture MaterialsCarbon DioxideCarbon Dioxide SorbentsChemisorptionFossil Fuel CombustionMetal-organic Framework AdsorptionMetal-organic Frameworks
Carbon dioxide capture from fossil fuel combustion typically relies on chemisorption, which is highly selective but incurs a large energy penalty for CO₂ release, motivating the search for physisorbents. The zinc‑based MOF’s central pore binding site blocks hydrogen‑bonding networks with water, enabling selective CO₂ physisorption. The material physisorbs CO₂ with a lower regeneration penalty, preferentially adsorbs CO₂ at 40 % relative humidity, and retains performance at 150 °C flue‑gas conditions. Lin et al.
A hydrophobic CO 2 physisorbent Most materials for carbon dioxide (CO 2 ) capture of fossil fuel combustion, such as amines, rely on strong chemisorption interactions that are highly selective but can incur a large energy penalty to release CO 2 . Lin et al . show that a zinc-based metal organic framework material can physisorb CO 2 and incurs a lower regeneration penalty. Its binding site at the center of the pores precludes the formation of hydrogen-bonding networks between water molecules. This durable material can preferentially adsorb CO2 at 40% relative humidity and maintains its performance under flue gas conditions of 150°C. —PDS
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