Encapsulated deep eutectic solvent and carbonic anhydrase jointly by microfluidics for high capture performance of carbon dioxide

Excessive carbon dioxide (CO 2 ) emissions from fossil fuel combustion have a profound impact on environment, leading to different associated climate disasters. Although deep eutectic solvents (DES) have the advantage of high absorption capacity of CO 2 , their high viscosities sharply decrease absorption performance due to the low absorption rates. Herein, one of DES choline chloride / urea (CU) and carbonic anhydrase (CA) was encapsulated jointly by microfluidics and crosslinked thermally (microcapsule@(CU + CA)), which was designed for high capture performance of CO 2 . The absorption abilities of microcapsules have been significantly improved by the increase of specific surface area, in which the absorption capacity and absorption rate of microcapsule@(CU + CA) were 74 times and 253 times higher than that of neat CU. In addition, the selectivity of CO 2 /CH 4 also increased 62 times via encapsulation. The high cyclic performance of microcapsule@(CU + CA) was achieved for its high absorption performance and high ability to desorb CO 2 from microcapsule. DES and CA encapsulated jointly by microfluidics can realize high absorption capacity, high absorption rate and high absorption selectivity simultaneously, and it also provides a potential pathway for the efficient capture of various gases.