Achieving efficient CO2 capture through the synergistic effect of sulfur and calcium in the electrospun lignin-based carbon membrane

This work cleverly utilizes the sulfur contained in lignin itself to achieve the self-growth of calcium sulfide on the surface of electrospun lignin-based carbon membranes, and successfully applies it to the efficient capture of CO 2 . The membrane is synthesized through electrospinning technology combined with one-step calcium loading and carbonization process. The maximum adsorption capacity of the membrane is 1.56 mmol/g at 500 ℃ with a mixed gas of 99 % N 2 and 1 % CO 2 . The Avrami fractional kinetic model indicates that the CO 2 adsorption process is a combination of single-layer and multi-layer adsorption behavior. More importantly, this work innovatively proposes utilizing the CO 2 capture process to promote the migration of sulfur in lignin. Sulfur containing product such as calcium sulfate is generated during the CO 2 capture process. All in all, this work not only lays the foundation for the application of lignin in CO 2 capture, but also provides crucial support for the efficient capture of CO 2 and the advancement of poly-generation technology based on carbon capture.