Mg-MOF-74/Polyvinyl acetate (PVAc) mixed matrix membranes for CO2 separation

Majumdar, Srabani; Tokay, Begum; Martin-Gil, Violeta; Campbell, James; Castro-Mu�oz, Roberto; Ahmad, Mohd Zamidi; Fila, Vlastimil

Abstract

In this study, Mg-MOF-74 crystals were synthesised in order to prepare polymer/Mg-MOF-74 mixed matrix membranes (MMMs) for CO2/CH4 separation. Activation temperature and time of the Mg-MOF-74 crystals were determined in order to enhance the performance of polymer/Mg-MOF-74 mixed matrix. The Mg-MOF-74 crystals were then incorporated into polyvinyl acetate (PVAc) matrix to form dense MMMs by a solvent-casting method. After the structural characterisation of the prepared membranes, their CO2/CH4 separation properties were determined by measuring mixed gas permeabilities at 6 and 15 bar with a Wilke-Kallenbach method at steady-state. SEM image of MMM showed there were no visible voids at the MOF/polymer interface. The highest BET area of Mg-MOF-74 crystals was measured when activiation was performed at 150 oC for 24 h under vacuum. Mixed gas permeability measurements of the membranes showed that both CO2 permeability and selectivity were improved with the increasing amount of MOF suggesting strong adsorption selectivity of Mg-MOF-74 for CO2. Activation time of Mg-MOF-74 crystals influenced the permeability and selectivity of MMMs. Incorporation of Mg-MOF-74 helped reducing the effect of plasticization.

Citation

Majumdar, S., Tokay, B., Martin-Gil, V., Campbell, J., Castro-Muñoz, R., Ahmad, M. Z., & Fila, V. (2020). Mg-MOF-74/Polyvinyl acetate (PVAc) mixed matrix membranes for CO2 separation. Separation and Purification Technology, 238, Article 116411. https://doi.org/10.1016/j.seppur.2019.116411

• Journal Article Type: Article
• Acceptance Date: Dec 7, 2019
• Online Publication Date: Dec 13, 2019
• Publication Date: May 1, 2020
• Deposit Date: Jan 10, 2020
• Publicly Available Date: Dec 14, 2020
• Journal: Separation and Purification Technology
• Print ISSN: 1383-5866
• Electronic ISSN: 1873-3794
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 238
• Article Number: 116411
• DOI: https://doi.org/10.1016/j.seppur.2019.116411
• Keywords: Mg-MOF-74; CPO-27(Mg); Mixed matrix membranes; CO2/CH4; Activation; PVAc
• Public URL: https://nottingham-repository.worktribe.com/output/3702300
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S1383586619339747
• Additional Information: This article is maintained by: Elsevier; Article Title: Mg-MOF-74/Polyvinyl acetate (PVAc) mixed matrix membranes for CO2 separation; Journal Title: Separation and Purification Technology; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.seppur.2019.116411; Content Type: article; Copyright: © 2019 Elsevier B.V. All rights reserved.