Preparation of higher flux NaA zeolite membrane on asymmetric porous support and permeation behavior at higher temperatures up to 145°C in vapor permeation

Sato, K.; Sugimoto, Kazunori; Nakane, Takashi

doi:10.1016/j.memsci.2007.09.017

Cited by 70 publications

(29 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pervaporation performance of the high-silica CHA type zeolite membrane was evaluated by the dehydration of 50 wt% acetic acid aqueous solution at 75 43) . The permeate flux and separation factor, α(H2O/CH3COOH), were 7.9 kgm -2 h -1 and about 2500, respectively, and the membrane performance was identical to that of the commercially available NaA type zeolite membranes used for the dehydration of alcohol solution 54) . The leak acetic acid concentration was about 0.04 wt%.…”

Section: Membrane For Dehydration Of Acetic Acidmentioning

confidence: 75%

High Potential of Interzeolite Conversion Method for Zeolite Synthesis

Sano

Itakura

Sadakane

2013

J. Jpn. Petrol. Inst.

101

View full text Add to dashboard Cite

Many types of zeolites such as beta (hereinafter, BEA), CHA, LEV, RUT, and MFI were successfully synthesized by interzeolite conversion of FAU, BEA, and LEV type zeolites as starting materials under various hydrothermal synthesis conditions. The crystallization rates of zeolites using such starting zeolites were notably elevated compared to rates observed in conventional hydrothermal syntheses using amorphous aluminosilicate gels. This characteristic enhancement in the crystallization rate results from the generation of locally ordered aluminosilicate species (nanoparts) through the decomposition/dissolution of the starting zeolite, resulting in assembly and evolution into another type of zeolite. The structural similarity between the starting zeolite and the final crystallized zeolite is a crucial factor for interzeolite conversion. These findings strongly indicate that the interzeolite conversion route is an attractive strategy for zeolite synthesis and zeolite design will be possible after methods to selectively assemble the nanoparts are established.

show abstract

Section: Membrane For Dehydration Of Acetic Acidmentioning

confidence: 75%

High Potential of Interzeolite Conversion Method for Zeolite Synthesis

Sano

Itakura

Sadakane

2013

J. Jpn. Petrol. Inst.

101

View full text Add to dashboard Cite

show abstract

“…The synthesized Y-type membrane exhibited a higher dehydration performance in a water/ethanol mixture up to 9-10 kg m −2 h −1 in permeation flux at 75 • C, compared with those in the previous studies for Y-type zeolite membranes at the same PV condition [8][9][10]. This also means that the partial water flux through the Y-type membrane [21] is larger than those of NaA zeolite membranes at 75 • C [23,24,27,28].…”

Section: Introductionmentioning

confidence: 46%

“…The utilization of an asymmetric support has to be investigated for development of high performance NaY zeolite membranes, because (i) a lower mass transfer resistance is expected in the asymmetric support and (ii) a thinner zeolite active layer could be formed on the support layer with smaller pore sizes of the asymmetric support surface [28]. The influence of asymmetric support was investigated in the NaA zeolite membranes [28], suggesting higher permeation fluxes are expected also in the Y-type zeolite membranes using the asymmetric support.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of industrial scale NaY zeolite membranes and ethanol permeating performance in pervaporation and vapor permeation up to 130°C and 570kPa

Sato¹,

Sugimoto²,

Nakane³

2008

Journal of Membrane Science

Self Cite

View full text Add to dashboard Cite

“…[38][39][40] follow the relationship between water removal and DEC enhancement but at a lower performance. We assume that the low water concentration is the underlying reason.…”

Section: Resultsmentioning

confidence: 99%

Continuous CO₂ esterification to diethyl carbonate (DEC) at atmospheric pressure: application of porous membranes for in situ H₂O removal

2017

View full text Add to dashboard Cite

The direct synthesis of diethyl carbonate (DEC) from ethanol and carbon dioxide over Ce 0.8 Zr 0.2 O 2 catalysts was investigated in continuous mode at atmospheric pressure. Three main parameters, namely molar ratio of ethanol/CO 2 , flux and temperature, have significant influence on the formed DEC amount and were studied systematically. With 32 mmol DEC L −1 cat h −1 achieved at ambient pressure, an ethanol/ CO 2 molar ratio of 3 and a temperature of 100°C the continuous approach offers a higher productivity compared to batch reactions, normally performed in autoclaves under much higher pressure. Moreover, in order to shift the equilibrium to promote the formation of DEC, four inorganic porous membranes, (i) MFI zeolite, Si/Al ratio ∼57; (ii) MFI zeolite, Si/Al ratio ∼270; (iii) LTA (NaA) zeolite; and (iv) a microporous carbon membrane, have been applied for product removal in a catalytic membrane reactor. A relationship between the amount of removed water achieved by the membranes and the enhancement of formed DEC amount was found. The productivity can be increased to 47 mmol DEC L −1 cat h −1 using an MFI-57 membrane.

show abstract

Preparation of higher flux NaA zeolite membrane on asymmetric porous support and permeation behavior at higher temperatures up to 145°C in vapor permeation

Cited by 70 publications

References 30 publications

High Potential of Interzeolite Conversion Method for Zeolite Synthesis

High Potential of Interzeolite Conversion Method for Zeolite Synthesis

Synthesis of industrial scale NaY zeolite membranes and ethanol permeating performance in pervaporation and vapor permeation up to 130°C and 570kPa

Continuous CO₂ esterification to diethyl carbonate (DEC) at atmospheric pressure: application of porous membranes for in situ H₂O removal

Contact Info

Product

Resources

About

Preparation of higher flux NaA zeolite membrane on asymmetric porous support and permeation behavior at higher temperatures up to 145°C in vapor permeation

Cited by 70 publications

References 30 publications

High Potential of Interzeolite Conversion Method for Zeolite Synthesis

High Potential of Interzeolite Conversion Method for Zeolite Synthesis

Synthesis of industrial scale NaY zeolite membranes and ethanol permeating performance in pervaporation and vapor permeation up to 130°C and 570kPa

Continuous CO2 esterification to diethyl carbonate (DEC) at atmospheric pressure: application of porous membranes for in situ H2O removal

Contact Info

Product

Resources

About

Continuous CO₂ esterification to diethyl carbonate (DEC) at atmospheric pressure: application of porous membranes for in situ H₂O removal