Development and assessment of magnetic Fe2O3@MOF-74 composite sorbents for ethylene/ethane separation

Magnetic-Field Assisted Gas Desorption from Fe2O3/Zeolite 13X Sorbent Monoliths for Biogas Upgrading

“…Most recently, we developed novel composites of Fe 2 O 3 @MOF-74 composites and investigated their adsorption performance in ethane/ ethylene separation. 12 The reported results demonstrated the suitability of these types of magnetic-responsive sorbents for olefin/paraffin separations.…”

“…Although the magnetic field has no direct influence on the cooling rate, the magnetic field targets only the sorbent, while the conventional heating must heat both the column wall and the sorbent. Therefore, the conventional heating process requires additional cooling due to the conduction of the column wall, thereby increasing the cooling step time . However, it is important to emphasize the dilemma of the need for convective cooling to bring the temperature of the bed down to the adsorption temperature in the case of induction cooling.…”

“…Therefore, the conventional heating process requires additional cooling due to the conduction of the column wall, thereby increasing the cooling step time. 12 However, it is important to emphasize the dilemma of the need for convective cooling to bring the temperature of the bed down to the adsorption temperature in the case of induction cooling. This can in fact serve as a drawback of this method since the cooling rate can very largely dictate the cycle time, similar to the conventional TSA process.…”

“…The main technologies considered for biogas upgrading include absorption via amine scrubbing and pressurized water scrubbing, adsorption via pressure swing adsorption (PSA), and membrane via gas permeation. 8−10 Adsorption-based separation has the potential to adopt nonthermal practices for regeneration of sorbents such as electric swing adsorption (ESA), 9 magnetic induction swing adsorption (MISA), 11,12 or microwave swing adsorption (MSA). 13 In particular, magnetic responsiveness is a valuable characteristic that can be exploited to address the problem of high-energy requirements of separation processes, as magnetic fieldinduced heating can be used for desorption, with the heat generated homogeneously through the material due to localized nanoheaters, and thus is preferred for the adsorbents with low thermal conductivity where the heating time can be greatly reduced.…”

Direct Synthesis of Ethylene and Hydrogen from CO2 and Ethane over a Bifunctional Structured CaO/Cr2O3-V2O5/ZSM-5 Adsorbent/Catalyst Monolith

“…Ethylene (C 2 H 4 ) is an important raw feedstock used to produce diverse chemicals such as polyethylene oxide, polyethylene, vinyl acetate, and ethylene dichloride. The typical process used for C 2 H 4 production is the steam cracking of hydrocarbons such as naphtha, which occurs at high temperatures (750–950 °C). − The global demand for C 2 H 4 has increased dramatically in recent years and it is anticipated that C 2 H 4 supply will not meet the future demand, thus development of novel processes technologies for sustainable production of C 2 H 4 is crucial to meet such ever-increasing demands . In that regard, the ubiquitous presence of C 2 H 6 in shale gas makes the process of direct C 2 H 6 dehydrogenation to C 2 H 4 a promising approach from an economic point of view.…”