Separation of traces of CO from air using MFI-type zeolite membranes

Piera, Elena; Brenninkmeijer, Carl A. M.; Santamarı́a, Jesús; Coronas, Joaquı́n

doi:10.1016/s0376-7388(01)00647-0

Cited by 28 publications

(7 citation statements)

References 10 publications

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“…The support provides the mechanical strength to the membrane while the zeolite layer accomplishes the separation. The porous support can either be disc [14,18,37] or tubular [38][39][40] shape. For industrial applications, tubular membranes are more suitable than discs because larger surface area in a unit volume can be obtained with tubes.…”

Section: Synthesis Of Zeolite Membranesmentioning

confidence: 99%

“…The highest CO 2 /CH 4 mixture selectivity was 5.5 at room temperature. The selectivity decreased with temperature because of a decrease in adsorption at high temperatures.Although there are many studies related with the separation of binary gas mixtures, separation of multicomponent gas mixtures[10,39,77] is very limited. The studies performed for the separation of multicomponent gas mixtures was summarized in Table2.1.…”

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confidence: 99%

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Characterization of zeolite membranes by gas permeation

2006

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pagesZeolite membranes are attractive materials to separate gas and liquid mixtures. MFI is a widely studied zeolite type due to its ease of preparation and comparable pore size with the molecular size of many substances. In this study MFI type membranes were synthesized over porous α-Al 2 O 3 supports and characterized with XRD, SEM and gas permeation measurements.In the first part of this study the effect of soda concentration of the synthesis solution on the membrane morphology and crystal orientation was investigated. The synthesis was carried out from solutions with a molar composition of (0-6.5)Na 2 O:25SiO 2 :6.9TPABr:1136H 2 O at 150 o C. At soda concentrations between 0.45 and 1.8 the membrane layers with (h0h)/c-directed orientation were obtained.At lower and higher soda concentrations membrane layer formed from randomly oriented crystals. The (h0h)/c-oriented membranes showed H 2 /n-C 4 H 10 ideal selectivities of 478 and 36 at 25°C and 150°C, respectively.

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Section: Synthesis Of Zeolite Membranesmentioning

confidence: 99%

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confidence: 99%

Characterization of zeolite membranes by gas permeation

2006

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“…Membrane separation technology appears to be an energy-efficient alternative for gas separation in view of its advantages including relatively lower capital costs and simplicity in operation versus conventional separation technologies. ,, Because of their advantages, including high chemical and mechanical stability and well-defined pore structure, various types of zeolite membranes are being investigated by different researchers, and these zeolite membranes appear to be potential candidates for gas separation. − These include MFI, − FAU, − A-type, − DDR, , T-type, , and silicoaluminophosphate-34 (SAPO-34) ,, and CHA zeolite membranes . Zeolite membranes such as SAPO-34 have gained importance for gas separation because of their small pore structure.…”

Section: Introductionmentioning

confidence: 99%

Ion-Exchanged Silicoaluminophosphate-34 Membrane for Efficient CO₂/N₂ Separation with Low CO₂ Concentration in the Gas Mixture

Chew¹,

Yeong²,

et al. 2018

Ind. Eng. Chem. Res.

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The Ba form of a silicoaluminophosphate-34 (SAPO-34) zeolite membrane was synthesized and investigated for carbon dioxide (CO 2 )/nitrogen (N 2 ) separation with low CO 2 concentration (as low as 5%) in the feed. The effects of the separation temperature, CO 2 concentration in the feed, and pressure difference on the separation performance of the Ba form of a SAPO-34 zeolite membrane were investigated. A CO 2 gas permeance of 17.5 × 10 −7 mol/m 2 •s•Pa and a CO 2 /N 2 separation selectivity of 78 were attained for the Ba form of a SAPO-34 zeolite membrane at 100 kPa pressure difference, 303 K, and 5% CO 2 concentration in the feed. With low CO 2 concentration (5%) in the CO 2 /N 2 mixture, the Ba form of a SAPO-34 zeolite membrane was efficient in CO 2 /N 2 separation and displayed good stability for the separation performance of CO 2 /N 2 gas mixtures, in a gas separation durability test up to a total durability test time of 58 h.

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“…1 Different types of zeolite membranes have different crystal structure, pore size, and surface properties, thus exhibiting different separation and/or catalytic properties. Membranes of zeolite types Y, 2-5 X, [6][7][8] MOR, 9,10 MFI, [11][12][13][14][15][16] A, [17][18][19][20][21][22][23][24] T, [25][26][27][28][29][30] and W 31,32 have been prepared and used for gas separation and pervaporation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Ceramic Membranes (W‐Type Zeolite Membranes)

Mohammadi

Maghsoodloorad

2012

Int J Applied Ceramic Tech

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In this article, effects of synthesis parameters (synthesis temperature, synthesis time, and number of layers) on W‐type zeolite membranes synthesized over flat SUS supports for O2/SF6 gas separation were experimentally investigated. Experiments were carried out at these levels of synthesis temperature: 165°C, 185°C, and 200°C; synthesis time: 6, 12, and 18 h and number of layers: 1 and 2. Permeation measurements, XRD and SEM analysis were used for characterization of the synthesized membranes. The results showed that increasing synthesis temperature from 165°C up to 185°C increases separation factor of O2/SF6, however, further increasing decreases the separation performance. The same trend was observed for synthesis time for the single layer synthesized zeolite W membrane, although for the double layer synthesized zeolite W membrane, separation factor increased with increasing synthesis time. Repetition of layering has a net positive effect on separation factor of O2/SF6, and negative effect on permeation flux through the membranes. This behavior was attributed to the dual effect of synthesis temperature and synthesis time on selectivity. More zeolite crystals are deposited and larger crystals are formed at higher synthesis temperatures and longer synthesis times. Well W‐type zeolite membrane was synthesized at 185°C for 18 h with two repeating layers with a high separation factor of 20.1.

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Separation of traces of CO from air using MFI-type zeolite membranes

Cited by 28 publications

References 10 publications

Characterization of zeolite membranes by gas permeation

Characterization of zeolite membranes by gas permeation

Ion-Exchanged Silicoaluminophosphate-34 Membrane for Efficient CO₂/N₂ Separation with Low CO₂ Concentration in the Gas Mixture

Synthesis and Characterization of Ceramic Membranes (W‐Type Zeolite Membranes)

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Separation of traces of CO from air using MFI-type zeolite membranes

Cited by 28 publications

References 10 publications

Characterization of zeolite membranes by gas permeation

Characterization of zeolite membranes by gas permeation

Ion-Exchanged Silicoaluminophosphate-34 Membrane for Efficient CO2/N2 Separation with Low CO2 Concentration in the Gas Mixture

Synthesis and Characterization of Ceramic Membranes (W‐Type Zeolite Membranes)

Contact Info

Product

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Ion-Exchanged Silicoaluminophosphate-34 Membrane for Efficient CO₂/N₂ Separation with Low CO₂ Concentration in the Gas Mixture