NaA zeolite membranes synthesized on top of APTES-modified porous stainless steel substrates

Galeano, Yohana Martínez; Cornaglia, Laura María; Tarditi, Ana María

doi:10.1016/j.memsci.2016.04.005

Cited by 33 publications

(6 citation statements)

References 32 publications

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“…For example, a study by Kanezashi and Lin [47] where H2 and CO2 permeation through MFI membranes synthesized on alumina support via secondary seeded growth method was measured shows that the permeance of H2 and CO2 decreased with increasing temperature. The decrease in permeance was attributed to the Knudsen-type temperature dependency display of the membrane up to 500 °C and this agrees with studies reported elsewhere [48][49][50]. At the same time, these studies [48][49][50] suggested that increase in H2 and CO2 permeance with an increase temperature indicates that permeation is controlled by activated diffusion instead by Knudsen diffusion.…”

Section: Single Gas Permeationsupporting

confidence: 90%

“…The decrease in permeance was attributed to the Knudsen-type temperature dependency display of the membrane up to 500 °C and this agrees with studies reported elsewhere [48][49][50]. At the same time, these studies [48][49][50] suggested that increase in H2 and CO2 permeance with an increase temperature indicates that permeation is controlled by activated diffusion instead by Knudsen diffusion. On the other hand, constant CO2 permeance at increasing temperature observed by Farjoo and coworker [51] was attributed to the combined contributions from activated process and non-zeolitic flux.…”

Section: Single Gas Permeationsupporting

confidence: 90%

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Preparation and Evaluation of Nanocomposite Sodalite/α-Al2O3 Tubular Membranes for H2/CO2 Separation

2020

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Nanocomposite sodalite/ceramic membranes supported on α-Al2O3 tubular support were prepared via the pore-plugging hydrothermal (PPH) synthesis protocol using one interruption and two interruption steps. In parallel, thin-film membranes were prepared via the direct hydrothermal synthesis technique. The as-synthesized membranes were evaluated for H2/CO2 separation in the context of pre-combustion CO2 capture. Scanning electron microscopy (SEM) was used to check the surface morphology while x-ray diffraction (XRD) was used to check the crystallinity of the sodalite crystals and as-synthesized membranes. Single gas permeation of H2, CO2, N2 and mixture gas H2/CO2 was used to probe the quality of the membranes. Gas permeation results revealed nanocomposite membrane prepared via the PPH synthesis protocols using two interruption steps displayed the best performance. This was attributed to the enhanced pore-plugging effect of sodalite crystals in the pores of the support after the second interruption step. The nanocomposite membrane displayed H2 permeance of 7.97 × 10−7 mol·s−1·m−2·Pa−1 at 100 °C and 0.48 MPa feed pressure with an ideal selectivity of 8.76. Regarding H2/CO2 mixture, the H2 permeance reduced from 8.03 × 10−7 mol·s−1·m−2·Pa−1 to 1.06 × 10−7 mol·s−1·m−2·Pa−1 at 25 °C and feed pressure of 0.18 MPa. In the presence of CO2, selectivity of the nanocomposite membrane reduced to 4.24.

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Section: Single Gas Permeationsupporting

confidence: 90%

Section: Single Gas Permeationsupporting

confidence: 90%

Preparation and Evaluation of Nanocomposite Sodalite/α-Al2O3 Tubular Membranes for H2/CO2 Separation

2020

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“…Surface functionalization using different silane coupling groups (e.g. -Cl, -NH 2 , -OH) significantly eliminates the problem of reactivity heterogeneity from region to region on metal substrate, and facilitates the deposition of a gel layer and promotes the nucleation of zeolite particles on the substrate, while also improving the compatibility between the substrate surface and zeolite coating [26][27][28][29][30]. In view of this, silane pretreatment is typically utilized to increase the gas separation performance of zeolite coatings on steel substrates.…”

Section: Introductionmentioning

confidence: 99%

Influence of 3-aminopropyltriethoxysilane/tetraethylorthosilicate mixture pretreatment on the microstructure and corrosion resistance of zeolite coating

Chen

2023

Surface Engineering

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The influence of silane pretreatment with five different volume ratios (100/0, 75/25, 50/50, 25/ 75, and 0/100) of 3-aminopropyltriethoxysilane (APTES)/tetraethylorthosilicate (TEOS) on microstructure and corrosion resistance of the hydrothermal synthesized zeolite coatings on the H13 steel substrates was investigated. The surface of the zeolite coatings on the 100/0, 75/25, and 50/50 mixture of the APTES/TEOS pretreated substrates was composed of intergrown rectangular particles. Additionally, pores were observed. A 25/75 mixture of APTES/TEOS pretreatment smoothed the edges and angles of zeolite particles with gel-like materials filled in the pores. In pure TEOS pretreatment, microcracks, and much gel-like materials were observed on the zeolite coating. The electrochemical test revealed that the zeolite coating on a 50/50 mixture of the APTES/TEOS pretreated substrate exhibited the highest corrosion resistance in 3.5 wt-% NaCl solution. This was because a 50/50 mixture of APTES/TEOS pretreatment advantageously promoted development of a dense and thick gel layer, which enhanced the intergrowth of zeolite particles.

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“…In recent years, researchers assembled organics, such as cationic polymers 17,18 or covalent linkers, 19,20 on the rough surface of the support and used the organics to capture the active ingredients in the synthesis solution, promoting the formation of well intergrown and compact zeolite membranes. While this method could provide appreciably high selectivity membranes, the membranes usually exhibited low permeability with stability issues owing to the organics contained in the membrane.…”

Section: Introductionmentioning

confidence: 99%

In situ constructed zeolite membranes on rough supports with the assistance of reticulated hydrotalcite interlayer

et al. 2021

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NaA zeolite membranes synthesized on top of APTES-modified porous stainless steel substrates

Cited by 33 publications

References 32 publications

Preparation and Evaluation of Nanocomposite Sodalite/α-Al2O3 Tubular Membranes for H2/CO2 Separation

Preparation and Evaluation of Nanocomposite Sodalite/α-Al2O3 Tubular Membranes for H2/CO2 Separation

Influence of 3-aminopropyltriethoxysilane/tetraethylorthosilicate mixture pretreatment on the microstructure and corrosion resistance of zeolite coating

In situ constructed zeolite membranes on rough supports with the assistance of reticulated hydrotalcite interlayer

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