Single polymer sorbent fibers for high performance and rapid direct air capture

Abstract

Polymers of intrinsic microporosity (PIM) fibers featuring amidoxime and amine functionalities were formulated into high- performance CO2 adsorbents. Fiber sorbents were composed of a single porous polymer component functionalized with...

Guanidine-Functionalized PIM-1 as a High-Capacity Polymeric Sorbent for CO2 Capture

“…19,20 Sekizkardes et al similarly used diethylenetriamine (DETA) and tris(2-aminoethyl)amine (TAEA) in PIM-1 fibers. 21 The PEI@PIM-1 fibers and TAEA@PIM-1 fibers adsorbed 1.24 and 1.9 mmol/g-fiber at 0.1 bar CO 2 , respectively, which are encouraging values for materials that are prepared in a simple and scalable fashion. However, the infused polyamines can occlude the PIM-1 pore structure, leading to slow CO 2 transport rates and therefore lower cycling capacity, limiting the amount of amine that can be added.…”

“…The PEI@PIM-1 fibers and TAEA@PIM-1 fibers adsorbed 1.24 and 1.9 mmol/g-fiber at 0.1 bar CO 2 , respectively, which are encouraging values for materials that are prepared in a simple and scalable fashion. However, the infused polyamines can occlude the PIM-1 pore structure, leading to slow CO 2 transport rates and therefore lower cycling capacity, limiting the amount of amine that can be added. − In addition, considerable energy is often required for CO 2 desorption from these materials. Finally, amine loss can occur more easily when the amines are not bonded to the polymer, especially at high humidity and/or temperature.…”

“…To enhance CO 2 -binding power, a few groups have impregnated PIM-1 with amines. Pang et al infused PIM-1 powder and fibers with polyethylenimine (PEI), and Quan et al prepared PIM-1 hollow fibers infused with PEI. , Sekizkardes et al similarly used diethylenetriamine (DETA) and tris­(2-aminoethyl)­amine (TAEA) in PIM-1 fibers . The PEI@PIM-1 fibers and TAEA@PIM-1 fibers adsorbed 1.24 and 1.9 mmol/g-fiber at 0.1 bar CO 2 , respectively, which are encouraging values for materials that are prepared in a simple and scalable fashion.…”

Dynamic study of direct CO2 capture from indoor air using poly(ethylenimine)-impregnated fiber sorbents

“…Armstrong et al 65 studied the system kinetics of DAC by sorbent-containing porous electro-spun fibers made with the solvothermal polymer additive removal technique, reaching a high cyclic capacity with an estimated productivity of 1.4 mmol CO 2 per gram-hour. Sekizkardes et al 66 investigated fibers of polymers of intrinsic microporosity (PIM) based on amidoxime and amine functionalities for DAC, and achieved a 0.8 mmol CO 2 per g fiber uptake and a rapid CO 2 adsorption rate (5 minute adsorption cycle). Zhang et al 67 studied tetraethylenepentamine-grafted polyacrylonitrile (TEPA@PAN) hollow fibers and achieved a CO 2 capacity of 2.03 mmol g −1 at ambient CO 2 concentration.…”