Poly urethane mixed matrix membranes for propylene and propane separation

Amedi, Hamid Reza; Aghajani, Masoud

doi:10.1007/s11696-018-0386-x

Cited by 8 publications

(6 citation statements)

References 29 publications

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“…[ 47 ] It is worth mentioning that good ZIF‐PIM compatibility and porous PIM‐1 endow ZIF‐8 86 ‐CN 14 @tPIM‐1 with top‐class selectivity among reported ZIF‐8 MMMs and most advanced permeability over the others (Figure 5c). [ 18–31 ] Another comparison with ZIF‐8 polycrystalline membranes shows that ZIF‐8 86 ‐CN 14 @tPIM‐1 has superior C 3 H 6 permeability and moderate competence in C 3 H 6 /C 3 H 8 selectivity (Table S5, Supporting Information). The selectivity–permeability points lie well above the latest upper bound, [ 48 ] and C 3 H 6 /C 3 H 8 selectivity (23.4) and C 3 H 8 permeance (≈22 GPU) are of the industrial interest for C 3 H 6 /C 3 H 8 separation from purge gas or olefin cracker according to selectivity and permeance requirements of 6–10/15–20 and 20–40 GPU.…”

Section: Resultsmentioning

confidence: 99%

“…[ 12 ] Thus, ZIF‐8 has been explored as the filler to fabricate MMMs for this purpose. [ 13–31 ] In ZIF‐8 MMMs, the C 3 H 6 /C 3 H 8 selectivity is kinetically controlled by the ZIF‐8 fillers themselves. Thus, the interface engineering between ZIF‐8 and polymer is of paramount importance for tailoring the membrane selectivity because few phase‐boundary defects can severely suppress the selectivity for C 3 H 6 over C 3 H 8 .…”

Section: Introductionmentioning

confidence: 99%

“…The literature showed that the ZIF–polymer compatibility in ZIF‐8 MMMs was improved by matrix modification (i.e., synthesis of new polymer, post functionalization or binder addition). [ 15–27 ] Although the selectivity was increased, the permeability was largely sacrificed; however, high permeability is very demanding in membrane propylene separation. [ 32 ] ZIF‐8 functionalization is another method to modify the ZIF–polymer interfaces in MMMs; however, few studies have been reported on this phenomenon, [ 28–31 ] probably due to metal saturated coordination and ligand chemical inertness in the ZIF‐8 structure.…”

Section: Introductionmentioning

confidence: 99%

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Covalent‐Linking‐Enabled Superior Compatibility of ZIF‐8 Hybrid Membrane for Efficient Propylene Separation

Wang

Zeng

et al. 2021

Advanced Materials

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The interface is a critical issue for metal–organic‐framework hybrid membranes in propylene separation. Here, a covalent‐linking strategy is reported for strikingly reinforcing the interfacial compatibility in a ZIF‐8‐based membrane. A functionalized ZIF‐8 material named ZIF‐8‐CN is synthesized using the mixed‐ligand approach. ZIF‐8‐CN has an identical crystalline structure to ZIF‐8, and the 4,5‐dicyanoimidazole ligand is available for further functionalization. Covalent linkage of ZIF‐8‐CN with PIM‐1 is driven by the thermal reaction of the cyano groups on both entities, which strengthens the filler–polymer connection in the ZIF‐8‐CN@tPIM‐1 membrane. ZIF‐8‐CN@tPIM‐1 exhibits remarkably enhanced propylene permeation property with C3H6/C3H8 selectivity of ≈28, which is 350% and 180% higher than those on non‐treated ZIF‐8‐CN/PIM‐1 and non‐functionalized ZIF‐8@tPIM‐1, respectively. Additionally, ZIF‐8‐CN@tPIM‐1 shows the highest C3H6 permeability of ≈370 Barrer among all relevant ZIF‐8 membranes. This strategy opens an avenue for precise interface engineering in membranes and the resultant high performance is appealing in the propylene separation industry.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Covalent‐Linking‐Enabled Superior Compatibility of ZIF‐8 Hybrid Membrane for Efficient Propylene Separation

Wang

Zeng

et al. 2021

Advanced Materials

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“…29 This work set a precedent to the advancements of MOF-based membranes and some reports on ZIF-8 or other MOF-based MMMs were subsequently reported for C 3 H 6 /C 3 H 8 separation. 8,[30][31][32][33][34][35][36][37] Recently, Lee and Kang, reported a high permeability MMM for C 3 H 6 /C 3 H 8 separation based on bimetallic ZIF-8 (ZIF-8-67). The bimetallic MOF exhibits a bigger aperture size than that of ZIF-8 because of the larger angle and longer coordination bond, which lead to a distinct molecular sieving behavior toward C 3 H 6 /C 3 H 8 .…”

Section: Introductionmentioning

confidence: 99%

Facilitated propylene transport in mixed matrix membranes containing ZIF‐8@Agmim core‐shell hybrid material

et al. 2022

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The ZIF‐8@Agmim core‐shell hybrid material was synthesized via a favorable post‐modification method of ion exchange (PMIE). This infrequent ZIF‐8@Agmim core‐shell structure maintains a well‐integrated pore size that is almost the same as ZIF‐8. The similar equilibrium isotherms with ZIF‐8 and better kinetic separation toward propylene/propane than ZIF‐8 render ZIF‐8@Agmim to be an interesting candidate for propylene/propane separation. The core‐shell hybrid nanomaterial was further used as nanofillers in the polymer of intrinsic microporosity matrix (PIM‐1) for propylene/propane separation. The resultant mixed‐matrix membranes (MMMs) exhibited a simultaneous increase in C3H6 permeability and C3H6/C3H8 ideal selectivity compared to pure polymer membrane owing to a synergistic effect of molecular sieving from ZIF‐8 and π‐complexation of Ag+ with propylene. The separation performance of the prepared MMM surpasses the upper bound line of polymer membranes. Furthermore, the hybrid materials possess superb photochemical stability and the corresponding MMMs exhibit excellent anti‐aging property and long‐term stability.

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“…The best sample is related to 0.4 molar zinc concentration with 21 gpu and a selectivity factor of 42. Many studies have been conducted on the fabrication of a MMM containing the ZIF-8 particle. − In 2012, Koros et al reviewed the separation of propylene and propane using the 6FDA-DAM/ZIF-8 MMM. In this study, it has been shown that there is a good compatibility between ZIF-8 and polymer matrix and, by adding it to the polymer, the properties of both permeability and selectivity separation are increased.…”

Section: Introductionmentioning

confidence: 99%

Economic Estimation of Various Membranes and Distillation for Propylene and Propane Separation

Amedi

Aghajani

2018

Ind. Eng. Chem. Res.

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The separation of propylene and propane is very costly due to similar physical-chemical properties. In this study, the effect of various membranes on the economic performance of the olefin unit was evaluated. The Robeson’s line cannot judge the economic performance of membrane separation systems. A precise model of cocurrent and counter-current hollow fiber membrane was developed and implemented in a commercial chemical engineering software to estimate the economics of the best inorganic (ZIF-8) and polymeric (6FDA-TrMPD) membranes compared with the existing distillation unit. At the same area, the cocurrent flows have higher recovery and the counter-current flows have higher purity. The use of the alternative polymer membrane results in a drastic increase in costs. The ZIF-8 membrane performance leads to a 30% increase in the total capital costs, while the annual cost considerably decreased by 46%. When the membrane performance is appropriate in terms of selectivity and permeability, the use of membrane processes alone is more economical than the use of membrane-distillation systems. But when this is mediocre, cost savings in hybrid systems are higher than the membrane system. Also, to achieve high purity, the use of high selectivity materials is more efficient than high permeability materials.

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Poly urethane mixed matrix membranes for propylene and propane separation

Cited by 8 publications

References 29 publications

Covalent‐Linking‐Enabled Superior Compatibility of ZIF‐8 Hybrid Membrane for Efficient Propylene Separation

Covalent‐Linking‐Enabled Superior Compatibility of ZIF‐8 Hybrid Membrane for Efficient Propylene Separation

Facilitated propylene transport in mixed matrix membranes containing ZIF‐8@Agmim core‐shell hybrid material

Economic Estimation of Various Membranes and Distillation for Propylene and Propane Separation

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