Performance evaluation of CuBTC composites for room temperature oxygen storage

Leena Melag; M Munir Sadiq; Kristina Konstas; Farnaz Zadehahmadi; Kiyonori Suzuki; Matthew R Hill

doi:10.1039/d0ra07068h

Performance evaluation of CuBTC composites for room temperature oxygen storage

RSC Adv. 2020 Nov 10;10(67):40960-40968. doi: 10.1039/d0ra07068h. eCollection 2020 Nov 9.

Authors

Leena Melag¹, M Munir Sadiq¹, Kristina Konstas², Farnaz Zadehahmadi², Kiyonori Suzuki³, Matthew R Hill^{1

2}

Affiliations

¹ Department of Chemical Engineering, Monash University Clayton VIC 3168 Australia Matthew.Hill@csiro.au.
² CSIRO Private Bag 33, Clayton South MDC VIC 3169 Australia.
³ Department of Materials Science and Engineering, Monash University Clayton VIC 3168 Australia.

Abstract

Oxygen is commonly separated from air using cryogenic liquefaction. The inherent energy penalties of phase change inspire the search for energy-efficient separation processes. Here, an alternative approach is presented, where we determine whether it is possible to utilise simpler, stable materials in the right process to achieve overall energy efficiency. Adsorption and release by Metal-Organic Frameworks (MOFs) are an attractive alternative due to their high adsorption and storage capacity at ambient conditions. Cu-BTC/MgFe₂O₄ composites were prepared, and magnetic induction swing adsorption (MISA) used to release adsorbed oxygen quickly and efficiently. The 3 wt% MgFe₂O₄ composites exhibited an oxygen uptake capacity of 0.34 mmol g^-1 at 298 K and when exposed to a magnetic field of 31 mT, attained a temperature rise of 86 °C and released 100% of adsorbed oxygen. This water vapor stable pelletized system, can be filled and emptied within 10 minutes requiring around 5.6 MJ kg^-1 of energy.