Facile preparation of oxygen-rich porous polymer microspheres from lignin-derived phenols for selective CO2 adsorption and iodine vapor capture

Adjustable Functionalization of Hyper-Cross-Linked Polymers of Intrinsic Microporosity for Enhanced CO2 Adsorption and Selectivity over N2 and CH4

“…To be competitive for carbon capture, the working capacity of these sorbents should result in greater than 2 mmol g –1 (>88 mg g –1 ) at 298 K, they should be very stable and resistant for numerous cycles and, of course, inexpensive and producible on large scale . Several porous hyper-cross-linked polymers have been investigated for this purpose, and the best performances were achieved when functional groups such as hydroxy (−OH), , amino (−NH 2 ), − nitro (−NO 2 ), and sulfonic (−SO 3 H) , were incorporated in the backbone, which improved the affinity of the material for CO 2 .…”

Carbonate-based hyper-cross-linked polymers with pendant versatile electron-withdrawing functional groups for CO2adsorption and separation

“…It is obvious that among these porous materials, polymer 3 possessing the highest BET surface area of 1367 m 2 g À1 as well as carbonyl and ester groups and nitrogen atoms has the best CO 2 uptake of 14.61 wt% at 273.15 K/1.00 bar. Although this is much lower than that of the topperforming N-containing scaffolds, [51][52][53][54][55][56] the determined CO 2 adsorption value of polymer 3, to our delight, is comparable or superior to some of the reported porous polymers, even those with larger BET surface areas or total pore volumes (Table 2), [57][58][59][60][61][62][63][64][65][66] which rmly indicates that the porosity parameters including high BET surface area, narrow pore size and pore size distribution, micropore volume, and pore volume along with the introduced functionalities such as nitrogen, carbonyl and ester groups play an essential role in increasing the CO 2 capturing performance. To gain further insight into the binding affinity of these functional polymers towards CO 2 molecules, the isosteric heat of adsorption (Q st ) of the polymers was calculated using the Clausius-Clapeyron equation according to the CO 2 adsorption isotherms measured at 273.15 K and 298.15 K. As revealed in Fig.…”

Eco-Friendly Production of Hyper-Cross-Linked Polymers Using Mechanosynthesis and Bioresources: A Critical Review

“…These HCPs showed very good iodine uptake, with maximum capacities of around 250 wt % at 75 °C and 1 bar, comparable to those observed for the trypticene-based HCP reported in a previous section . In a different approach, smaller units derived from lignin, such as guaiacol, p -methoxyphenol, m -methoxyphenol, 4-ethylphenol, and others, have also been used as precursors for HCP formation . Again, although the A BET values were less than 250 m 2 /g, CO 2 and iodine uptakes were found to be as high as 64.1 mg/g (at 0 °C and 1 bar) and 192.3 wt %, respectively.…”