TY - JOUR

T1 - Continuous Separation of Light Olefin/Paraffin Mixtures on ZIF-4 by Pressure Swing Adsorption and Membrane Permeation

AU - Hovestadt, Maximilian

AU - Friebe, Sebastian

AU - Helmich, Lailah

AU - Lange, Marcus

AU - Möllmer, Jens

AU - Gläser, Roger

AU - Mundstock, Alexander

AU - Hartmann, Martin

N1 - Funding information: Acknowledgments: Financial support for this work by the German Science Foundation (Deutsche Forschungsgemeinschaft, DFG) in the frame of the priority program SPP 1570 under contract HA 2527/12-3 is gratefully acknowledged. The authors of this work are also grateful for the financial support from the EU 7th Framework Project M4CO2 (Grant Agreement No 608490), organized by Freek Kapteijn and Jorge Gascon. We also thank Jürgen Caro for stimulating discussions. Financial support for this work by the German Science Foundation (Deutsche Forschungsgemeinschaft, DFG) in the frame of the priority program SPP 1570 under contract HA 2527/12-3 is gratefully acknowledged. The authors of this work are also grateful for the financial support from the EU 7th Framework Project M4CO2 (Grant Agreement No 608490), organized by Freek Kapteijn and Jorge Gascon. We also thank J rgen Caro for stimulating discussions.

PY - 2018/4/11

Y1 - 2018/4/11

N2 - In this study, two zeolitic imidazolate frameworks (ZIFs) called ZIF-4 and ZIF-zni (zni is the network topology) were characterized by sorption studies regarding their paraffin/olefin separation potential. In particular, equilibrated pure and mixed gas adsorption isotherms of ethane and ethene were recorded at 293 K up to 3 MPa. ZIF-4 exhibits selectivities for ethane in the range of 1.5–3, which is promising for continuous pressure swing adsorption (PSA). ZIF-4 shows high cycle stability with promising separation potential regarding ethane, which results in purification of the more industrial desired olefin. Furthermore, both ZIF materials were implemented in Matrimid to prepare a mixed matrix membrane (MMM) and were used in the continuous separation of a propane/propene mixture. The separation performance of the neat polymer is drastically increased after embedding porous ZIF-4 crystals in the Matrimid matrix, especially at higher feed pressures (3–5 barg). Due to the smaller kinetic diameter of the olefin, the permeability is higher compared to the paraffin.

AB - In this study, two zeolitic imidazolate frameworks (ZIFs) called ZIF-4 and ZIF-zni (zni is the network topology) were characterized by sorption studies regarding their paraffin/olefin separation potential. In particular, equilibrated pure and mixed gas adsorption isotherms of ethane and ethene were recorded at 293 K up to 3 MPa. ZIF-4 exhibits selectivities for ethane in the range of 1.5–3, which is promising for continuous pressure swing adsorption (PSA). ZIF-4 shows high cycle stability with promising separation potential regarding ethane, which results in purification of the more industrial desired olefin. Furthermore, both ZIF materials were implemented in Matrimid to prepare a mixed matrix membrane (MMM) and were used in the continuous separation of a propane/propene mixture. The separation performance of the neat polymer is drastically increased after embedding porous ZIF-4 crystals in the Matrimid matrix, especially at higher feed pressures (3–5 barg). Due to the smaller kinetic diameter of the olefin, the permeability is higher compared to the paraffin.

KW - Membrane permeation

KW - Olefin/paraffin separation

KW - Pressure swing adsorption (PSA)

KW - ZIF-4

UR - http://www.scopus.com/inward/record.url?scp=85045278484&partnerID=8YFLogxK

U2 - 10.3390/molecules23040889

DO - 10.3390/molecules23040889

M3 - Article

C2 - 29641508

AN - SCOPUS:85045278484

VL - 23

JO - Molecules

JF - Molecules

SN - 1420-3049

IS - 4

M1 - 889

ER -