A review of metal-organic frameworks and polymers in mixed matrix membranes for CO₂ capture

• Charlotte Skjold Qvist Christensen,
• Nicholas Hansen,
• Mahboubeh Motadayen,
• Nina Lock,
• Martin Lahn Henriksen and
• Jonathan Quinson

Beilstein J. Nanotechnol. 2025, 16, 155–186, doi:10.3762/bjnano.16.14

• . Simulations revealed a CO2/N2 selectivity of 4800 on a post-combustion flue gas (15/85 mixture of CO2/N2) and a CO2/CH4 selectivity of 5 × 1028 on a 50/50 CO2/CH4 mixture, placing this MOF among the theoretically best CO2-selective molecular sieves reported to date [58]. Certain MOFs exhibit structural

• modification expanded the pore-limiting diameter marginally from 2.8 to 2.9 Å, while maintaining the overall MOF topology. This isoreticular fine-tuning led to an increase in CO2/N2 selectivity from 180 to 500 in simulations of a 15/85 binary CO2/N2 mixture at 1 bar and 293 K. Alternatively, incorporating pro

• CuSiF6 precursor instead of ZnSiF6 during synthesis. Substituting the larger Zn2+ ions with the smaller Cu2+ ions reduced the pore diameter to 3.50 Å and improved CO2/N2 selectivity in breakthrough experiments. It is important to note that various factors in the synthesis of MOF particles, such as the

Facile synthesis of Fe-based metal–organic frameworks from Fe₂O₃ nanoparticles and their application for CO₂/N₂ separation

• Van Nhieu Le,
• Hoai Duc Tran,
• Minh Tien Nguyen,
• Hai Bang Truong,
• Toan Minh Pham and
• Jinsoo Kim

Beilstein J. Nanotechnol. 2024, 15, 897–908, doi:10.3762/bjnano.15.74

• resulting material, resulting in a high yield of 81% and an impressive BET surface area of 1365.4 m2·g−1. At 25 °C and 1 bar, M-100Fe@Fe2O3#1.80 showed a CO2 adsorption capacity of 1.10 mmol·g−1 and an IAST-predicted CO2/N2 selectivity of 18, outperforming conventional adsorbents in CO2/N2 separation

• . Importantly, this route opens a new approach to utilizing Fe2O3-based waste materials from the iron and steel industry in manufacturing Fe-based MIL-100 materials. Keywords: CO2/N2 separation; Fe2O3 nanoparticles; hydrothermal reaction; IAST-predicted CO2/N2 selectivity; MIL-100(Fe); Introduction Metal

• . Estimation of CO2/N2 selectivity via ideal adsorbed solution theory (IAST) The IAST is widely recognized as a predictive means to evaluate the adsorption selectivity of an adsorbent towards a gas mixture without experimental data for the gas mixture. Herein, a binary mixture of CO2 and N2 containing 10 vol

Playing with covalent triazine framework tiles for improved CO₂ adsorption properties and catalytic performance

• Giulia Tuci,
• Andree Iemhoff,
• Housseinou Ba,
• Lapo Luconi,
• Andrea Rossin,
• Vasiliki Papaefthimiou,
• Regina Palkovits,
• Jens Artz,
• Cuong Pham-Huu and
• Giuliano Giambastiani

Beilstein J. Nanotechnol. 2019, 10, 1217–1227, doi:10.3762/bjnano.10.121

• . Keywords: covalent triazine frameworks; CO2 adsorption; CO2/N2 selectivity; dehydrogenation catalysis; ionothermal conditions; Introduction Recent years have witnessed an increasing interest in carbon-based nanomaterials as functional devices for energy-related applications [1]. Their unique properties

• CO2/N2 selectivity were measured at 298 K up to 1.2 bar. The isosteric heat of adsorption (Qst) was calculated from the measured CO2 isotherms at 273 and 298 K using a variant of the Clausius–Clapeyron equation (Equation 1) [51][63]: where Pn (n = 1 or 2) is the pressure value for isotherm n; Tn (n

• = 1 or 2) is the temperature value for isotherm n; R is the gas constant, R = 8.314 J·K−1·mol−1. CO2/N2 selectivity was calculated on the basis of the Henry model, taking into account the initial slopes of the adsorption isotherms (Supporting Information File 1, Figure S7). The IAST selectivity for a