Magnetic Framework Composites for Low Concentration Methane Capture

This study proposes a simple and energy efficient technique for methane (CH₄) capture from low concentration emission sources. An extrusion-based process was used to fabricate magnetic framework composites (MFCs) from a metal organic framework (MOF), aluminum fumarate, and MgFe₂O₄ magnetic nanoparticles (MNP). Methane uptake for MFCs with different MNP loading at 1 bar and 300 K revealed a high methane uptake of up to 18.2 cm³ g^–1. To regenerate the MFCs, a magnetic induction swing adsorption (MISA) process was applied. A working capacity of 100% was achieved for the MFC over 10 adsorption–desorption cycles with an average of 6 min per cycle for the regeneration step. The ability to access 100% of the adsorbed CH₄ in the MFC with rapid and localized heating achieved with the MISA process potentially provides an energy efficient technique for CH₄ capture and reuse from low concentration sources

Performance evaluation of CuBTC composites for room temperature oxygen storage

Oxygen is commonly separated from air using cryogenic liquefaction.</p

Task-Specific Ionic Liquid Functionalized–MIL–101(Cr) as a Heterogeneous and Efficient Catalyst for the Cycloaddition of CO₂ with Epoxides Under Solvent Free Conditions

A novel heterogeneous catalyst was synthesized by immobilization of a carboxylic acid- and imidazolium-based ionic liquid on the mesoporous MIL–101­(Cr) (MIL–101­(Cr)–TSIL) and used to convert abundant, nontoxic, economical and renewable CO2 gas to cyclic carbonates without the need for a cocatalyst or a solvent. The catalyst was characterized in detail by multiple techniques such as XRD, TEM, SEM, EDX, DR-FTIR, solid-state NMR, as well as N2 and CO2 adsorption measurements. The catalytic properties were studied by varying different parameters including amount of catalyst and epoxide, temperature, pressure, and reaction time. Under optimal conditions (100 mg catalyst, 15 mmol epoxide, 2.0 MPa CO2 pressure, 110 °C and 2 h reaction time) various cyclic carbonates were obtained with high yield and selectivity. MIL–101­(Cr)–TSIL catalyst displayed good thermal stability and could be reused after simple separation without a significant decrease in its catalytic activity. Due to synergetic effect of the hydrogen bond from the carboxylic acid group for activation of the C–O bond of the epoxide, adsorption of CO2 by the imidazolium moiety, and high concentration of CO2 around the task specific ionic liquid (TSIL), arisen from the mesoporous framework, MIL–101­(Cr)–TSIL is a highly effective catalytic system for the solvent-free cycloaddition of CO2 with epoxide