Metal–organic frameworks for biogas upgrading: Recent advancements, challenges, and future recommendations. (March 2021)

• Record Type: Journal Article
• Authors: Khan, Amin; Qyyum, Muhammad Abdul; Saulat, Hammad; Ahmad, Rizwan; Peng, XinSheng; Lee, Moonyong
• Is Part Of: Applied materials today. Volume 22(2021)
• Publication Date: 2021-03
• Subjects: Biogas -- Metal–organic frameworks -- Adsorption -- Composite membranes -- Biomethane; CHP Combined heat and power plants -- CuBDC-NS Copper 1, 4-benzenedicarboxylate nanosheet -- GHG Greenhouse gas -- HKUST-1 Hong Kong University of Science and Technology -- LIC Leiden Institute of Chemistry -- MOFs Metal–organic frameworks -- PSE Process system engineering -- SBU Secondary building units -- UIO Universitetet i Oslo -- ZIF Zeolitic imidazolate framework -- PSf Polysulfone -- PES Polyethersulfone -- PI Polyimide -- PEI Polyetherimide -- CA Cellulose acetate -- CTA Cellulose triacetate -- PDMS Polydimethylsiloxane -- PVTS Polyvinyltrimethylsilane -- PC Polycarbonate -- PA Polyaramide -- PPO Polyphenyleneoxide -- PMP Polymethylpentene; Materials science -- Periodicals; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1016/j.apmt.2020.100925
• Languages: English
• ISSNs: 2352-9407

Abstract

Highlights: 2D MOFs with high aspect ratio and small loading amount are key to biogas upgrading. 2D MOFs with compatible polymers hold the potential for future biogas upgrading. Development of water stable MOFs is a step forward for the MOFs commercialization. Hybrid MOFs with CO2 -philic polymers can improve future biogas upgrading technology. Strong alliance is needed between process system engineers and MOFs researchers. Abstract: Biogas with a methane content of ≥97% (called biomethane) has the potential to overcome the dependency on fossil fuel-based natural gas. Biomethane is obtained by the efficient upgrade (mainly the removal of CO2 ) of biogas. For this purpose, metal–organic frameworks (MOFs) are considered promising materials because of the advantages of inherent porosity, structural diversity, functionality, tailorability, and versatility. In this review, several aspects of MOFs with respect to biogas upgrading have been highlighted. In addition, significant factors have been discussed, such as the key progress in the removal of CO2 via the selective passage of CH4, challenges and issues related to CO2 removal, commercialization, and future prospects of MOFs in terms of materials science and process system engineering (PSE) to provide an in-depth understanding of MOFs for biogas upgrading. This novel review provides comprehensive overview of biogas upgrading via adsorptive and membrane-based separation techniques using MOFs in a single study. In addition, all of the important and influential parameters involved in enhancing CO2 capture, possible limitations and improvement strategies associated with these technological directions (adsorptive separation and membrane separation) have been explained for biogas upgrading. Most importantly, this study suggests that moisture-stable MOFs such as zeolitic imidazolate framework-8 (ZIF-8), the combination of ZIF-8 and ZIF-67 (ZIF-8/ZIF67), Universitetet i Oslo-66 (UiO-66), hybrid MOFs structures with appropriate functional groups and 2D MOF nanosheets with polymers of high intrinsic permeabilities, all have the potential to be ideal candidates for economical and efficient biogas upgrading. For better economical results at the industrial scale, the performance of MOFs should be evaluated in terms of both the swing adsorption process and the integrated membrane separation process under optimum conditions (pressure/temperature) to achieve fuel-grade biomethane. Graphical abstract: Image, graphical abstract