Poly(L‐lysine) Brush–Mesoporous Silica Hybrid Material as a Biomolecule‐Based Adsorbent for CO₂ Capture from Simulated Flue Gas and Air

Abstract

Peptides capture CO2: Poly(L‐lysine) brush–mesoporous silica hybrids were prepared and evaluated as biomolecule‐based CO2 adsorbents using simulated flue gas (10 % CO2) and simulated ambient air (400 ppm CO2). Compared to representative amine‐based adsorbents, the hybrids show higher or comparable capture capacity and outperform other materials in terms of amine efficiency. The hybrids are suggested to be promising new materials for CO2 capture, especially, from ultra‐dilute gas streams.

Enhanced CO2 Adsorption over Polymeric Amines Supported on Heteroatom‐Incorporated SBA‐15 Silica: Impact of Heteroatom Type and Loading on Sorbent Structure and Adsorption Performance

“…A significant focus has recently been directed towards solid materials that can capture CO 2 reversibly in repeated cycles 12. Among the array of available solid adsorbents, silica‐supported amine materials13 (e.g., amine‐impregnated porous silicas (class 1),14–17 amine‐grafted silica materials (class 2),18–20 and materials prepared through in situ polymerization of an amine‐containing monomer on a silica support (class 3),21, 22 etc.) have recently emerged as promising candidates for this use.…”

“…5, 23–26 Air capture has a potential advantage over conventional CCS because it can, in principle, be installed anywhere and can capture CO 2 from all sources, including small ubiquitous sources, such as cars and homes, if the technology is operated on a sufficiently large scale. Although the economics of processes have hardly been studied and scalable processes are still very early in their development,27–29 the collected work to date demonstrates that the silica‐supported amine materials are promising materials that effectively remove CO 2 from gases with CO 2 concentrations similar to ambient air,14e, 16, 19a, b, 21c, 22, 30–33 and initial economic assessments of processes employing supported amine materials are believed to be promising 29. The ability of silica‐supported amines to remove CO 2 from the air has the potential to not only impact air capture for environmental purposes, but also to open doors for on‐demand, on‐site CO 2 generation for productive use, such as feeding greenhouses, creation of a C1 feedstock for chemical and polymer production, feeding enclosed algae installations for biofuel production, or other industries 34.…”

Solid Adsorbents for Low-Temperature CO2 Capture with Low-Energy Penalties Leading to More Effective Integrated Solutions for Power Generation and Industrial Processes

“…Later, an investigation into the effect of support on the polymerization of aziridine was carried out by the same group, but higher loadings could not be achieved by using pore-expanded SiO 2 materials, revealing that fabricating and controlling of the in situ polymerization may be more complicated than expected (Drese et al, 2012). Another example of the Class 3 adsorbents was synthesized by in situ ring-opening polymerization of Z-protected lysine N -carboxyanhydride also by Jones' group (Chaikittisilp et al, 2011b).…”

Sponges with covalently tethered amines for high-efficiency carbon capture

“…Therefore, intensive efforts have been devoted to developing high-efficiency sorbents with covalently attached amines. However, most of the previous studies have mainly focused on the optimization of the sorbent support structure, with few reports advancing the chemistry to enhance the amine/ support ratio as well as the amine efficiency of the sorbents 5,19,20 .…”

“…Stepwise growth of melamine dendrimers and ring-opening polymerization of Z-protected L-lysine N-carboxyanhydride have been used previously to improve the amount of amine content [20][21][22] . Unfortunately, the available amine groups for CO 2 in these sorbents are relatively low leading to limited sorbent performance.…”