Journal
GREEN CHEMISTRY
Volume 18, Issue 8, Pages 2374-2384Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5gc02546j
Keywords
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Funding
- Novartis Pharma AG
- Massachusetts Institute of Technology [5710002924]
- EPSRC [EP/J014974/1]
- EPSRC [EP/M013693/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J014974/1, EP/M013693/1] Funding Source: researchfish
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In this work it is shown that PEEK membranes are green from the production point of view when compared with commercial polyimide (PI) based organic solvent nanofiltration (OSN) membranes. Green metrics (E-factor and solvent intensity) and waste cost were used in order to assess the environmental burden of PEEK membranes: the solvent intensity of PEEK membranes is 8.3 vs. 35-224 for PI based membranes, and the waste cost for PEEK membranes is 46 pound kg(-1) of polymer vs. 1019 pound kg(-1) of polymer (bench scale) and 189 pound kg(-1) of polymer (industrial scale) for PI based membranes. Scaling-up of PEEK membranes to spiral-wound modules was successfully achieved with permeances between 0.26 L h(-1) m(-2) bar(-1) and 0.47 L h(-1) m(-2) bar(-1) for THF, and molecular weight cut-offs (MWCO) of similar to 300 g mol(-1). As a final assessment, the solvent intensity and environmental burden associated with permeating a THF flow of 100 L h(-1) using PEEK membranes was also assessed. The results showed a waste cost of 1.4 pound m(-2) of membrane, significantly lower than PI based membranes.
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