Bendable Zeolite Membranes: Synthesis and Improved Gas Separation Performance

Wang, Bo; Ho, W.S. Winston; Figueroa, José; Dutta, Prabir K.

doi:10.1021/acs.langmuir.5b01306

Cited by 21 publications

(22 citation statements)

References 40 publications

(90 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We have reported a method to grow continuous zeolite membranes on top (Type I) of and within (Type II) porous polymer supports [10,11]. Separation measurements of CO 2 and N 2 by the zeolite-on-top Type I membranes exhibited a large variation in permeance and selectivity, while the zeolite-within-polymer Type II membranes exhibited more reproducible performance.…”

mentioning

confidence: 99%

Tolerance of polymer-zeolite composite membranes to mechanical strain

Chakraborty

Wang

Dutta

2016

Journal of Membrane Science

Self Cite

View full text Add to dashboard Cite

Zeolites are a family of porous inorganic aluminosilicate materials [1]. Their well-defined pores of molecular dimensions, thermal stability, as well as their ion-exchange properties make them suitable for separations, catalysis, environmental and medical applications [1].Zeolites can also be fabricated as membranes, and are studied for gas separation and pervaporation[2], with the latter being a commercial process [3]. The separation mechanism of zeolite membranes is distinct from polymer membranes, and in principle, zeolite membranes can have significantly better performance [4,5]. Self -standing zeolite membranes are fragile [6], so typically such membranes are grown on top of solid supports, alumina being quite common [2].Zeolite membranes are orders of magnitude more expensive than polymer membranes, primarily due to expensive support materials, batch fabrication process, and the synthesis method leads to defective membranes [2,7].Combination of zeolites with polymers is attractive, if the potential for adapting polymer membrane production is feasible, especially if the zeolite membrane synthesis can be speeded up. Several strategies exist for zeolite polymer composite membranes. Mixed matrix membranes are made by a dispersion of zeolite particles within a polymer matrix, and have been studied for gas separations [8]. Another strategy has been to put a very thin layer of nanozeolites on a porous polymer support, followed by the deposition of the gas separation active polymer layer on top of the zeolite film [9]. The transport properties are improved with the zeolite, since the active polymer film thickness can be reduced due to the smooth zeolite film. These composite membranes can be prepared by polymer membrane fabrication methods.

show abstract

mentioning

confidence: 99%

Tolerance of polymer-zeolite composite membranes to mechanical strain

Chakraborty

Wang

Dutta

2016

Journal of Membrane Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…al. 71 recently fabricated an intergrowth zeolite inside polymer pores. The resulted membrane is bendable around a radius of 1.5 cm curvature so that it is possible to fabricate spiral wound module from it.…”

Section: Modification Of Zeolite Membrane For Co 2 Capturementioning

confidence: 99%

Post combustion CO2 capture using zeolite membrane

Makertihartha

Dharmawijaya

Zunita

et al. 2017

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. Carbon dioxide emission is the major cause of global warming. It is believed that reducing carbon dioxide emission from fossil fuel combustion is the most effective way to prevent global warming. Membrane separation using zeolites offers energy efficient way to capture CO 2 compared to conventional separation techniques such as amine absorption. In general, flue gas has high temperature and mainly consisting nitrogen, water, CO 2 and traces of other compounds. These compounds have similar kinetic diameter thus simple Knudsen diffusion cannot separate CO 2 from flue gas mixture. Zeolite is beneficial to post-combustion CO 2 capture not only because it can withstand high temperature but also because of its unique sorption-diffusion separation mechanism. However, zeolite membrane faced a challenge to make it easier to fabricate. Relatively high zeolite price is also a significant hurdle to broaden its application. In order to relieve this problem, a lot of modifications have been performed. Zeolite modification by polymer has gained increased attention for post-combustion CO 2 capture application. To present a clear background, this work will present modifications of zeolite membrane using polymer. Special attention will be given to composite and mixed matrix membrane configuration. Several drawbacks and problems encountered will also be discussed.

show abstract

“…We have recently reported on the use of nanocrystals of faujasite (nanoFAU) for fabrication of membranes aimed towards CO 2 /N 2 separation [12][13][14][15][16][17][18]. In one of these strategies, a 200 nm layer of nanoFAU is deposited on a porous polyethersulfone support by vacuum deposition.…”

Section: Introductionmentioning

confidence: 99%

“…Besides the improved transport properties of the nanoFAU-polymer composite, the manufacturability of the membrane on a large scale via roll-to-roll machines is possible [19]. In a second strategy, we have used nanoFAU as seeds for secondary growth within and on top of porous polymer supports, with excellent CO 2 /N 2 transport properties [13,14,17].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Rapid and high yield synthesis method of colloidal nano faujasite

Wang

Shao

et al. 2016

Microporous and Mesoporous Materials

Self Cite

View full text Add to dashboard Cite

Conventional synthesis methods of isolated, colloidal nano faujasites (nanoFAU) have been limited by low yield (typically <10%) and long synthesis time (days). In this study, synthesis of colloidal nanoFAU by microwave heating and a recently reported dehydration/rehydration hydrothermal (DRHT) process is examined. All studies are done with a literature reported 3-day aged composition (Comp A, 0.048 Na 2 O: 2.40 (TMA) 2 O(2OH): 1.2 (TMA) 2 O(2Br): 4.35 SiO 2 : 1.0 Al 2 O 3 : 249 H 2 O, TMA + is tetramethylammonium). Using this composition in a hydrothermal process, nanoFAU with 5% yield is obtained in 96 hours. With microwave heating for 4 hours, micron-sized zeolite A crystals and nanoFAU are formed with yields of 13% and 7%, respectively. With DRHT, nanoFAU of Si/Al ratio 2.23 is formed in 20 hours with yield of 7%. It has been reported that supernatant of composition A after the hydrothermal process can be cycled with mid-synthesis addition of NaOH, resulting in yield of nanoFAU of 43% in 10 cycles in 576 hours. A synthesis protocol involving 29 hours of continuous DRHT process with mid-synthesis addition of NaOH over 6 cycles produced nanoFAU with a yield of 93%, average particle size of 29±7 nm, as measured by TEM, a Si/Al ratio of 1.76, and surface area of 625 m 2 /g. Practical implications, like cost and TMA + removal for the reported synthesis method is also included.

show abstract

Bendable Zeolite Membranes: Synthesis and Improved Gas Separation Performance

Cited by 21 publications

References 40 publications

Tolerance of polymer-zeolite composite membranes to mechanical strain

Tolerance of polymer-zeolite composite membranes to mechanical strain

Post combustion CO2 capture using zeolite membrane

Rapid and high yield synthesis method of colloidal nano faujasite

Contact Info

Product

Resources

About