Synthesis and characterization of hydrogen selective silica membranes prepared by chemical vapor deposition of vinyltriethoxysilane

Ahn, So-Jin; Yun, Gwang-Nam; Takagaki, Atsushi; Kikuchi, Ryuji; Oyama, S. Ted

doi:10.1016/j.memsci.2017.12.038

Cited by 26 publications

(20 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Morphology and Structure Of The Membranesmentioning

confidence: 70%

“…The analysis gives a pore size of 0.39 nm (Figure 7b). A comparable pure SiO2 membrane derived from TEOS gives a pore size of 0.34 nm [53] to 0.37 nm [60], confirming that the structure of the DMDMOS-derived membrane is looser. The second evidence for the more open structure of the DMDMOS-derived membrane over a pure TEOS-derived membrane is that the permeance order of CO2, Ar, and N2 followed the order of their molecular size rather than their molecular weight.…”

Section: Morphology and Structure Of The Membranesmentioning

confidence: 71%

“…Subsequent work [51,52] using this membrane confirmed that the H 2 /toluene separation ability was stable for more than 1000 h. It should be noted, however, that the H 2 /N 2 selectivity was lower than~100 due to an open porous silica network (0.3-0.47 nm [51]) compared to the TEOS-or TMOS-derived networks (~0.3 nm). Several studies have focused on silica membranes with other functional groups like vinyltriethoxysilane [53]. Noteworthy are recent studies that describe high-performance silica membranes [54][55][56].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of Silica Membranes by Chemical Vapor Deposition Using a Dimethyldimethoxysilane Precursor

et al. 2020

Self Cite

View full text Add to dashboard Cite

Silica-based membranes prepared by chemical vapor deposition of tetraethylorthosilicate (TEOS) on γ-alumina overlayers are known to be effective for hydrogen separation and are attractive for membrane reactor applications for hydrogen-producing reactions. In this study, the synthesis of the membranes was improved by simplifying the deposition of the intermediate γ-alumina layers and by using the precursor, dimethyldimethoxysilane (DMDMOS). In the placement of the γ-alumina layers, earlier work in our laboratory employed four to five dipping-calcining cycles of boehmite sol precursors to produce high H2 selectivities, but this took considerable time. In the present study, only two cycles were needed, even for a macro-porous support, through the use of finer boehmite precursor particle sizes. Using the simplified fabrication process, silica-alumina composite membranes with H2 permeance > 10−7 mol m−2 s−1 Pa−1 and H2/N2 selectivity >100 were successfully synthesized. In addition, the use of the silica precursor, DMDMOS, further improved the H2 permeance without compromising the H2/N2 selectivity. Pure DMDMOS membranes proved to be unstable against hydrothermal conditions, but the addition of aluminum tri-sec-butoxide (ATSB) improved the stability just like for conventional TEOS membranes.

show abstract

Section: Morphology and Structure Of The Membranesmentioning

confidence: 70%

Section: Morphology and Structure Of The Membranesmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of Silica Membranes by Chemical Vapor Deposition Using a Dimethyldimethoxysilane Precursor

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, CVD suffer from several disadvantages such as the raw materials high cost, the difficult control of the multicomponent materials deposition, the possibility of film hydrocarbon contamination, and the hazard effects caused by the use of explosive, flammable, toxic and corrosive gases [327]. Nevertheless, CVD techniques were used to prepare silica [328], silica-alumina [329]. Alumina-zirconia [330], and…”

Section: Membranementioning

confidence: 99%

Membrane separation as a pre-treatment process for oily saline water

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Recently, alumina‐based ceramic supports have attracted much attention owing to high‐temperature durability, higher mechanical strength, easy availability and a smooth surface. These advantages make them desirable for membrane and catalytic applications …”

Section: Introductionmentioning

confidence: 99%

Determination of Mechanical Properties of Composite Supports Used in Catalytic Membranes for Hydrogen Production and Separation

Deniz

Tüzün

2020

ChemistrySelect

View full text Add to dashboard Cite

This study includes the determination of mechanical properties involving equibiaxial flexural strength, elastic modulus, strain and hardness for composite supports developed to be used in catalytic membranes in order to produce and separate hydrogen. Composite supports are fabricated by mixing acidic, neutral and basic activated alumina types and sodium silicate binder. Three different Si /Al ratios are employed in the study. After preparing the support samples, they are calcined at the temperatures of 6000C and 12000C for 11 hours and 22 hours respectively. At the end of calcination, equibiaxial flexural strength, elastic modulus, strain, hardness and solid density of supports are tested for both temperatures. Generally, higher mechanical properties and solid density results are obtained at 6000C and it is found that neutral alumina gives the best mechanical properties and solid density for Si /Al ratio of 0.648 at 6000C.

show abstract

Synthesis and characterization of hydrogen selective silica membranes prepared by chemical vapor deposition of vinyltriethoxysilane

Cited by 26 publications

References 53 publications

Synthesis of Silica Membranes by Chemical Vapor Deposition Using a Dimethyldimethoxysilane Precursor

Synthesis of Silica Membranes by Chemical Vapor Deposition Using a Dimethyldimethoxysilane Precursor

Membrane separation as a pre-treatment process for oily saline water

Determination of Mechanical Properties of Composite Supports Used in Catalytic Membranes for Hydrogen Production and Separation

Contact Info

Product

Resources

About