Importance

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Abstract

The present disclosure provides improved systems, assemblies and methods to remove and recover CO₂ from emissions. More particularly, the present disclosure provides improved membrane contactors configured to remove CO₂ from flue gas by temperature swing absorption. In exemplary embodiments, the present disclosure provides a novel hollow fiber membrane contactor that integrates absorption and stripping using a nonvolatile reactive absorbent (e.g., 80% polyamidoamine (PAMAM) dendrimer generation 0, and 20% of an ionic liquid (IL)). Equilibrium CO₂ absorption in the nonvolatile viscous mixed absorbent is as high as 6.37 mmolCO₂/g absorbent in the presence of moisture at 50° C. A novel membrane contactor is provided for CO₂ absorption and stripping via a process identified as temperature swing membrane absorption (TSMAB). The contactor integrates non-dispersive gas absorption and hot water-based CO₂ stripping in one device/assembly containing two sets of commingled hollow fibers.

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First Claim