John Luke Woodliffe, Maciej Myszczynski, Michael Fay, Jesús Molinar-Díaz, Ed Lester, Karen Robertson
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引用次数: 0
Abstract
Magnetic framework composites (MFCs), comprising magnetic nanoparticles (MNPs) embedded in metal–organic frameworks (MOFs), have emerged as an exciting novel class of advanced functional materials. MFCs show particular promise for CO2 capture, where they overcome the low thermal conductivity barriers of MOFs by facilitating the use of magnetic induction heating for thermal regeneration. Current research in the field has focussed on dry powder MFCs. However, for scale up towards use in industry these powders require formulating into larger structures such as pellets. Herein we present the first study of pelletisation routes for MFCs.MFCs were first produced via an innovative continuous flow synthesis with multiple concentrations of magnetic nanoparticles, then formulated into pellets with various polymer binders. Surface area and CO2 capacity losses caused by pelletisation were minimised using a low-pressure extruder, with some binders showing zero pore blocking effects. Pellet mechanical strength was increased by 107% (crushing load) and 87% (elastic modulus) from formulating with just 4% polyvinyl alcohol binder. We also present the first investigation into the thermal properties of MFCs, essential for modelling the materials’ behaviours in packed bed adsorbers. Notably, thermal conductivity increased by 47% with 7.8% MNPs in the MFCs, compared to the pristine MOF, highly beneficial for applications requiring thermal cycling. The formulation and pelletisation methods explored are applicable to a range of MOFs and MFCs, facilitating the shaping of these exciting materials for positive impact across CO2 capture and other applications.
期刊介绍:
The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.