TY - JOUR
T1 - CO2–CH4 permeation in high zeolite 4A loading mixed matrix membranes
AU - Adams, Ryan T.
AU - Lee, Jong Suk
AU - Bae, Tae-Hyun
AU - Ward, Jason K.
AU - Johnson, J.R.
AU - Jones, Christopher W.
AU - Nair, Sankar
AU - Koros, William J.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUS-I1-011-21
Acknowledgements: NSF-STC (CERSP) under agreement CHE-9876674 and Award no. KUS-I1-011-21 made by the King Abdullah University of Science and Technology (KAUST) for this research.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2011/2
Y1 - 2011/2
N2 - Mixed matrix membranes (MMMs) with low particle loadings have been shown to improve the properties of pure polymers for many gas separations. Comparatively few reports have been made for high particle loading (≥50vol.%) MMMs. In this work, CO2-CH4 feeds were used to study the potential of 50vol.% zeolite 4A-poly(vinyl acetate) (PVAc) MMMs for natural gas separations. A low CO2 partial pressure mixed feed probed MMM performance below the plasticization pressure of PVAc and a high CO2 partial pressure mixed feed probed MMM performance at industrially relevant conditions above the plasticization pressure.Under both mixed feed conditions at 35°C, substantial improvements in overall separation performance were observed. At low CO2 partial pressures, CO2 permeability roughly doubled with a nearly 50% increase in selectivity versus pure PVAc under the same conditions. For the high CO2 partial pressure feed, CO2 permeability remained effectively unchanged with a 63% increase in selectivity versus pure PVAc. Surprisingly, the performance of these PVAc based MMMs approached the properties of current " upper bound" polymers. Overall, this work shows that significantly improved performance MMMs can be made with traditional techniques from a low cost, low performance polymer without costly adhesion promoters. © 2010.
AB - Mixed matrix membranes (MMMs) with low particle loadings have been shown to improve the properties of pure polymers for many gas separations. Comparatively few reports have been made for high particle loading (≥50vol.%) MMMs. In this work, CO2-CH4 feeds were used to study the potential of 50vol.% zeolite 4A-poly(vinyl acetate) (PVAc) MMMs for natural gas separations. A low CO2 partial pressure mixed feed probed MMM performance below the plasticization pressure of PVAc and a high CO2 partial pressure mixed feed probed MMM performance at industrially relevant conditions above the plasticization pressure.Under both mixed feed conditions at 35°C, substantial improvements in overall separation performance were observed. At low CO2 partial pressures, CO2 permeability roughly doubled with a nearly 50% increase in selectivity versus pure PVAc under the same conditions. For the high CO2 partial pressure feed, CO2 permeability remained effectively unchanged with a 63% increase in selectivity versus pure PVAc. Surprisingly, the performance of these PVAc based MMMs approached the properties of current " upper bound" polymers. Overall, this work shows that significantly improved performance MMMs can be made with traditional techniques from a low cost, low performance polymer without costly adhesion promoters. © 2010.
UR - http://hdl.handle.net/10754/597789
UR - https://linkinghub.elsevier.com/retrieve/pii/S0376738810008422
UR - http://www.scopus.com/inward/record.url?scp=78649916814&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2010.10.059
DO - 10.1016/j.memsci.2010.10.059
M3 - Article
SN - 0376-7388
VL - 367
SP - 197
EP - 203
JO - Journal of Membrane Science
JF - Journal of Membrane Science
IS - 1-2
ER -