High-performance hybrid pervaporation membranes with superior hydrothermal and acid stability

Castricum, H.L.; Kreiter, Robert; Veen, H.M. van; Blank, Dave H.A.; Vente, Jaap F.; Elshof, Johan E. ten

doi:10.1016/j.memsci.2008.07.014

Cited by 119 publications

(99 citation statements)

References 54 publications

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“…A second aspect that has been brought forward as possible origin of high hydrothermal stability is the increased connectivity of a monomer with the surrounding network when two silicon atoms are linked together by an organic bridge [19,65]. The fourfold connectivity of pure silica monomers is increased to sixfold for organically bridged monomers.…”

Section: Thermal and Hydrothermal Stabilitymentioning

confidence: 99%

“…In a follow-up study in the same year the first purely BTESE-based hybrid organosilica membrane was reported [65]. In view of the fact that its average pore size is larger (C 2 H 2 adsorption 514-546 m 2 /g; N 2 adsorption 131-311 m 2 /g), the corresponding membrane was a priori expected to be less selective.…”

Section: Pervaporationmentioning

confidence: 99%

“…Only substantially higher concentrations of HNO 3 or the use of even stronger acids like methyl sulfonic acid led to fast deterioration of the membrane, leading to complete loss of performance within several days [26,65]. Despite the fact that hybrid organosilica membranes are much more Fig.…”

Section: Stability Issuesmentioning

confidence: 99%

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Structure–property tuning in hydrothermally stable sol–gel-processed hybrid organosilica molecular sieving membranes

Elshof

Dral

2015

J Sol-Gel Sci Technol

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Supported microporous organosilica membranes made from bridged silsesquioxane precursors by an acid-catalyzed sol-gel process have demonstrated a remarkable hydrothermal stability in pervaporation and gas separation processes, making them the first generation of ceramic molecular sieving membranes with sufficient performance under industrially relevant conditions. The commercial availability of various a,x-bis(trialkoxysilyl)alkane and 1,4-bis(trialkoxysilyl)benzene precursors facilitates the tailoring of membrane properties like pore size and surface chemistry via the choice of precursor(s) and process variables. Here, we describe the engineering of sols for making supported microporous thin films, discuss the thermal and hydrothermal stability of microporous organosilicas and give a short overview of the developments and applications of these membranes in liquid and gas separation processes since their first report in 2008.Graphical Abstract

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Section: Thermal and Hydrothermal Stabilitymentioning

confidence: 99%

Section: Pervaporationmentioning

confidence: 99%

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Structure–property tuning in hydrothermally stable sol–gel-processed hybrid organosilica molecular sieving membranes

Elshof

Dral

2015

J Sol-Gel Sci Technol

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“…In this work a hybrid silica membrane (HybSi ® , developed at ECN) for dehydration was used. This HybSi ® membrane has a very high hydrothermal stability and can be used in the dehydration of various organics (ECN, 2010;Castricum et al, 2008a;Castricum et al, 2008b;Castricum et al, 2008c;Kreiter et al, 2009). In the current research the high stability of this membrane under the presence of aggressive organic solvents, like the aldehyde butyraldehyde, and catalyst impacts was confirmed.…”

Section: Membrane Reactorsmentioning

confidence: 99%

Acetals as Possible Diesel Additives

Agirre¹,

Barrio²,

Güemez³

et al. 2011

Economic Effects of Biofuel Production

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“…The exposure of silica to moisture (or steam) at around 70°C leads to the hydrolysis of Si-O-Si bonds [1]. The introduction of organic bridges in the silica microstructure makes it less susceptible for hydrolysis which extends the industrial application of silica membranes [14]. It has been reported that the shape, flexibility and length of organic bridges in the hybrid silica network have an influence on the membrane pore size, structure and affinity [15].…”

Section: Introductionmentioning

confidence: 99%

Doped microporous hybrid silica membranes for gas separation

Qureshi

Besselink

Elshof

et al. 2015

J Sol-Gel Sci Technol

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Hybrid silica (i.e., bis-triethoxysilylethane: BTESE) membranes doped with B, Ta or Nb were made through a sol-gel process. Triethyl borate, tantalum (V) ethoxide (TPE) and niobium (V) ethoxide (NPE) were selected as doping precursors. The doping concentration was optimized to produce sols, suitable for membrane fabrication. Thermal stability, structural analysis, crosssectional micrographs and single gas permeation experiments were performed on these membranes, and results are compared with an undoped BTESE membrane. It was observed that the synthesized doped BTESE materials and membranes resulted into a more open (and, in one occurrence, SF 6 permeable) pore microstructure, showing high permeances of larger gas molecules, while having a crosssectional thickness comparable to undoped BTESE membranes. Graphical Abstract& Louis Winnubst a.j.a.winnubst@utwente.nl;

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High-performance hybrid pervaporation membranes with superior hydrothermal and acid stability

Cited by 119 publications

References 54 publications

Structure–property tuning in hydrothermally stable sol–gel-processed hybrid organosilica molecular sieving membranes

Structure–property tuning in hydrothermally stable sol–gel-processed hybrid organosilica molecular sieving membranes

Acetals as Possible Diesel Additives

Doped microporous hybrid silica membranes for gas separation

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