CO2 adsorption performance of amino-functionalized SBA-15 under post-combustion conditions

Evaluation of porous clay heterostructures modified with amine species as adsorbent for the CO2 capture

“…These isotherms also display high squareness, although are less pronounced than those shown for the adsorbents impregnated with PEI ( Figure 8), suggesting that the adsorption process using TEPA is also governed by chemical interactions although in lower proportion than PEI. In this sense, it has been reported that the lower viscosity of TEPA favors the dispersion of the amine species and the diffusion of the CO 2 molecules along the porous structure due to a lower stacking of this polymer in comparison to PEI molecules [47].…”

“…With regard to the adsorbents impregnated with amine-rich polymers, as PEI or TEPA, a decrease of the S BET values and pore volumes was also observed (see Figure 3A-B and Table 1), which is directly related to the polymer content incorporated on the adsorbent due to the stacking of the amine-rich polymer on the surface of the porous structure. This fact is less pronounced in the case of the impregnation with TEPA due to M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 10 its lower viscosity, which favors the dispersion of the amine species on the surface of the adsorbent in comparison to PEI [47], as indicated the textural parameters (Table 1).…”

Role of additives in silica-supported polyethylenimine adsorbents for CO2 adsorption

“…One technique is a wet impregnation method in which liquid amine molecules are impregnated into a porous support via van der Waals forces. Another technique is a grafting process in which an alkanolamine molecule is grafted onto the inner surface of a porous support by reaction with a silanol group [9][10][11][12]. The former affords porous support surface-coated with amines, whereas the latter induces the formation of aminosilane-functionalized adsorbents.…”

Post-combustion CO2 adsorption on activated carbons with different textural properties

“…For CCS application, different classes of adsorbents, such as carbonaceous materials, zeolites, mesoporous silicas, metal organic frameworks, molecularly imprinted sorbents etc., are currently being investigated [8,13,16,[18][19][20][21][22]. Numerous literature studies are focused on solids functionalization with basic nitrogen groups (mainly organic amines), able to favourably interact with acidic CO 2 molecules [8,16,23]. Activated carbons are highly attractive for CO 2 capture, due to their general low cost and composite structure, characterized by micropores which determine high surface area for adsorption, but also meso-and macropores which can facilitate the diffusion (fast kinetics) of the adsorbate to the inner porosity [24][25][26].…”