Blocking defects in SAPO-34 membranes with cyclodextrin

Zhang, Yanfeng; Avila, Adolfo M.; Tokay, Begüm; Funke, Hans H.; Falconer, John L.; Noble, Richard D.

doi:10.1016/j.memsci.2010.04.006

Cited by 64 publications

(26 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We can also compare these permeances to other reported literature data. For example, the permeability of CO 2 through the disk membrane is 4.0 × 10 −13 mol m m −2 s −1 Pa −1 (1200 Barrer), which is comparable to the range of reported literature values of 2.0–9.2 ×10 −13 mol m m −2 s −1 Pa −1 (600–2700 Barrer) . Similarly, the H 2 permeability of the disk membrane was 1.8 × 10 −13 mol m m −2 s −1 Pa −1 (520 Barrer) which is in the range of reported values (300–600 Barrer) .…”

Section: Resultssupporting

confidence: 82%

Krypton‐xenon separation properties of SAPO‐34 zeolite materials and membranes

et al. 2016

View full text Add to dashboard Cite

Separation of the radioisotope 85Kr from 136Xe is an important target during used nuclear fuel recycling. We report a detailed study on the Kr and Xe adsorption, diffusion, and membrane permeation properties of the silicoaluminophosphate zeolite SAPO‐34. Adsorption and diffusion measurements on SAPO‐34 crystals indicate their potential for use in Kr‐Xe separation membranes, but also highlight competing effects of adsorption and diffusion selectivity. SAPO‐34 membranes are synthesized on α−alumina disk and tubular substrates via steam assisted conversion seeding and hydrothermal growth, and are characterized in detail. Membrane transport measurements reveal that SAPO‐34 membranes can separate Kr from Xe by molecular sieving, with Kr permeabilities around 50 Barrer and mixture selectivity of 25–30 for Kr at ambient or slight sub‐ambient conditions. The membrane transport characteristics are modeled by the Maxwell‐Stefan equations, whose predictions are in very good agreement with experiment and confirm the minimal competing effects of adsorption and diffusion. © 2016 American Institute of Chemical Engineers AIChE J, 63: 761–769, 2017

show abstract

Section: Resultssupporting

confidence: 82%

Krypton‐xenon separation properties of SAPO‐34 zeolite materials and membranes

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The membrane thicknesses shown in Table 1 are those obtained from EDX mapping, which generally agreed with the visually estimated membrane thicknesses obtained from SEM images. To obtain statistically reliable membrane thicknesses, the measurement was made at multiple (25)(26)(27)(28)(29)(30) points using several EDX/SEM images from at least two membrane samples of each type. Membrane T1 was synthesized with two templates (TEAOH and DPA) 29 , and membrane T2 was prepared with a single template (TEAOH).…”

Section: Methodsmentioning

confidence: 99%

Thin Hydrogen-Selective SAPO-34 Zeolite Membranes for Enhanced Conversion and Selectivity in Propane Dehydrogenation Membrane Reactors

et al. 2016

View full text Add to dashboard Cite

We demonstrate significantly enhanced conversion and selectivity in high-temperature propane dehydrogenation (PDH) membrane reactors via the synthesis and use of small-pore SAPO-34 zeolite membranes. The reduction of SAPO-34 membrane thickness to ∼1 μm levels while maintaining good H2 selectivity is challenging. Initial reductions in membrane thickness were achieved using a single structure-directing agent (SDA) and concentrated precursor solution, leading to a large permeance increase and good H2/hydrocarbon selectivity. We further show that thinner (∼1 μm) SAPO-34 membranes can be fabricated on a large area (∼18 cm2) tubular ceramic supports by the use of both base and salt forms of the SDA to independently control the SDA concentration and pH. EDX analysis and elemental mapping confirmed the formation of micrometer-thin (∼1 μm) SAPO-34 zeolite membrane layers on α-alumina tubular supports. Micrometer-thin SAPO-34 membranes reach propylene selectivities greater than 80% as well as high propane conversions (65–75% at weight hourly space velocities of 0.1–0.5 h–1), because of their efficient removal of hydrogen generated in the PDH reaction.

show abstract

“…In facilitated transport membranes, carrier fluid acts as an agent to dissolve gas with higher solubility. According to the different classes of the membranes, polymeric (15,16), inorganic (4,(17)(18)(19)(20)(21)(22)(23), mixed matrix (24)(25)(26)(27), and metal organic framework (MOFs) (3,(28)(29)(30)(31)(32)(33)(34)(35)(36) are mostly 1reported.…”

Section: Membrane Technologies For Co 2 /Ch 4 Separationmentioning

confidence: 99%

“…Although the zeolite T membrane demonstrated outstanding CO 2 /CH 4 selectivity, its performance deteriorated when the feed pressure increased, which was mainly due to the saturated coverage of gas in the pore wall (22). The SAPO-34 membrane is another excellent candidate in CO 2 /CH 4 separation with high selectivity and high CO 2 permeance under high pressure, and has been extensively studied by various researchers (4,(17)(18)(19)(48)(49)(50). Li et al (17) reported that SAPO-34 membrane growth on a stainless steel support separated CO 2 from CH 4 effectively with CO 2 /CH 4 selectivity of 270 and CO 2 permeance of 2 × 10 −7 mol/m 2 s Pa at 222 kPa.…”

Section: Inorganic Membranesmentioning

confidence: 99%

Zeolitic Imidazolate Frameworks (ZIF): A Potential Membrane for CO₂/CH₄Separation

Li¹,

Yeong²,

Lau³

et al. 2014

Separation Science and Technology

View full text Add to dashboard Cite

Removal of carbon dioxide (CO 2 ) from natural gas is of importance because the existence of CO 2 in natural gas increases the cost of the sweetening process. In recent years, membrane technology has emerged as an attractive alternative in separating CO 2 from CH 4 due to its economical, efficient, and environmentally-friendly process. Here, we review the different types of membranes used in CO 2 /CH 4 gas separation. Zeolitic imidazolate frameworks (ZIFs) membranes are emphasized and ZIF-8 membranes are selected for further discussion due to their remarkable properties, including high chemical and thermal stability, facile and controllable pore apertures, and high CO 2 permeance. Different types of methods used for the synthesis of ZIF membranes and the challenges encountered in the growth of the membrane are summarized. Potential use of microwave technology in fabricating a continuous and low-defects ZIF membrane within a short period of time are discussed and highlighted. In conclusion, future direction and perspectives are indicated.

show abstract

Blocking defects in SAPO-34 membranes with cyclodextrin

Cited by 64 publications

References 20 publications

Krypton‐xenon separation properties of SAPO‐34 zeolite materials and membranes

Krypton‐xenon separation properties of SAPO‐34 zeolite materials and membranes

Thin Hydrogen-Selective SAPO-34 Zeolite Membranes for Enhanced Conversion and Selectivity in Propane Dehydrogenation Membrane Reactors

Zeolitic Imidazolate Frameworks (ZIF): A Potential Membrane for CO₂/CH₄Separation

Contact Info

Product

Resources

About

Blocking defects in SAPO-34 membranes with cyclodextrin

Cited by 64 publications

References 20 publications

Krypton‐xenon separation properties of SAPO‐34 zeolite materials and membranes

Krypton‐xenon separation properties of SAPO‐34 zeolite materials and membranes

Thin Hydrogen-Selective SAPO-34 Zeolite Membranes for Enhanced Conversion and Selectivity in Propane Dehydrogenation Membrane Reactors

Zeolitic Imidazolate Frameworks (ZIF): A Potential Membrane for CO2/CH4Separation

Contact Info

Product

Resources

About

Zeolitic Imidazolate Frameworks (ZIF): A Potential Membrane for CO₂/CH₄Separation