Recent advances in direct air capture by adsorption

Abstract

This review provides exhaustive insights into material and process design of adsorption-based direct air capture in the past five years.

Ordered mesoporous carbon encapsulated linear poly(ionic liquid)s enabling synergy effect of surface groups and ionic moieties for CO2 fixation under mild conditions

“…The residue solvent was removed by rotary evaporation and the resulting solid was dried in a vacuum at 70 °C. 1 H NMR (400 MHz, Deuterium Oxide, Fig. S1): δ 9.08 (t, J = 1.7 Hz, 1H), 7.71 (t, J = 1.8 Hz, 1H), 7.60 -7.51 (m, 1H), 7.47 -7.35 (m, 2H), 7.05 -6.93 (m, 2H), 4.23 (t, J = 7.2 Hz, 2H), 1.91 -1.77 (m, 2H), 1.36 -1.24 (m, 2H), 0.88 (t, J = 7.4 Hz, 3H).…”

“…Carbon dioxide (CO 2 ) is one of the chief greenhouse gases causing growing global warming [1][2][3][4], and also an abundant inexpensive and nontoxic C1 feedstock [5,6]. In this regard, chemically fixing CO 2 into high-value-added chemicals has attracted great attention in the mitigation of CO 2 emission [7][8][9][10][11].…”

Carbon dioxide capture with zeotype materials

“…[233][234][235][236] Detailed discussions of DAC technologies can be found in previous review papers. 13,17,234,237,238 Here, only adsorption issues of DAC are presented, and readers interested in membrane separations for DAC are referred to ref. 239.…”

Enhanced Adsorption Selectivity of Carbon Dioxide and Ethane on Porous Metal–Organic Framework Functionalized by a Sulfur-Rich Heterocycle

“…Until a global transition to renewable energy, fossil fuels will need to be used for power production, that is why the decontamination of industrial flue gases from CO 2 is an important measure to reduce irreversible damage to the environment. Adsorption technologies afford efficient solutions for separation of gases, such as CO 2 and N 2 (the main flue gas components), CO 2 and CH 4 (the main components of biogas), as well as many other industrially relevant mixtures [ 2 ]. Metal–organic frameworks (MOFs) are versatile porous materials with great adsorption characteristics [ 3 , 4 , 5 ].…”

“…Adsorption energies (Δ E ) are given in kJ·mol –1 . Color code: Zn (green), S (yellow), O (red), N (blue), C (gray), H (light gray); Table S1: Crystal data and structure refinement for 1 ; Table S2: The parameters of porous structure of 1a ; Table S3: Virial coefficients A i and B j for gas adsorption isotherms at 273 K and 298 K on 1a; Table S4: Zero coverage heats of adsorption in kJ·mol –1 ; Table S5: Henry constants for gas adsorption on 1a in mmol·g −1 ·bar −1 at 273 K and 298 K obtained by virial approach; Table S6: Fitted parameters for adsorption isotherms on 1a at 273 K and 298 K and corresponding Henry constants; Table S7: The parameters of porous structure of [Zn 2 (bdc) 2 (dabco)], [Zn 2 (tdc) 2 (dabco)] [ 2 ] and [Zn 2 (ttdc) 2 (bpy)] ( 1a , this work). Reference [ 60 ] is cited in the supplementary materials.…”