Development of Hydrogen Permselective Membranes for Propylene Production

Ishii, Katsunori; Nagataki, Yuhei; Yoshiura, Junko; Saito, Yuta; Nagataki, Takaya; Nomura, Mikihiro

doi:10.1252/jcej.20we082

Cited by 3 publications

(7 citation statements)

References 22 publications

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“…The effect of deposition temperature on the hydrogen permeance of a few CVD processed membranes 146,150,165,257 . [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Cvd Process Parameters Selection and Controlmentioning

confidence: 99%

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Advances in surface modification and functionalization for tailoring the characteristics of thin films and membranes via chemical vapor deposition techniques

Mostafavi

Mishra

Gallucci

et al. 2023

J of Applied Polymer Sci

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Advanced materials are among the prime drivers for technological revolutions and transformation in quality of lives. Over time, several modification techniques have emerged enabling development of novel materials with extraordinary features. The present review aims to introduce various promising chemical and physical surface modification techniques instrumental for tailoring the characteristics of thin films and membranes. Meticulous discussions are provided over chemical vapor deposition (CVD) techniques evolved for addressing the demands for materials with desired functionalities. Also, essential criteria for the selection of substrates, modifying and precursor materials for an effective CVD modification are elaborated. Investigations are extended to unraveling the role of various process parameters on the quality and properties of deposition. Special attention is paid to the significance and performance of CVD‐based membranes and thin films for industrial applications ranging from desalination and water treatment to energy and environment, biomedical and life science as well as packaging. The goal has been to establish a scientific platform for a timely tracking of the prevailing trends in exploitation of CVD techniques and highlighting the unexplored opportunities. This also helps in identification of the scientific and technical gaps and setting directions for further progress in the fields of thin films and membranes.

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“…The effect of deposition temperature on the hydrogen permeance of a few CVD processed membranes 146,150,165,257 . [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Cvd Process Parameters Selection and Controlmentioning

confidence: 99%

“…The mechanism of counter diffusion of precursor and oxidant in a CDCVD process. 134 [Color figure can be viewed at wileyonlinelibrary.com] fully formed. 134 This method has been widely used for the preparation of silica membranes with molecular sieving as the main mechanism of transport.…”

Section: Counter Diffusion Cvdmentioning

confidence: 99%

Advances in surface modification and functionalization for tailoring the characteristics of thin films and membranes via chemical vapor deposition techniques

Mostafavi

Mishra

Gallucci

et al. 2023

J of Applied Polymer Sci

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“…The porous tuber α-alumina substrate (pore size: 150 nm; OD: 10 mm; ID: 7 mm; effective membrane length: 30 mm; effective membrane area: 9.42 cm 2 ; NA−1, Noritake Co., Ltd., Aichi, Japan) was used as the substrate. The intermediate layer coated on α-alumina substrates was prepared using the same procedure as reported by Ishii et al [18]. γ-Alumina sol was coated by using alumina sol (5S, Kawaken Fine Chemicals Co., Ltd., Tokyo, Japan) and pure water (1:1 [vol/vol]) solution.…”

Section: Experimental 21 Preparation Of γ-Alumina Substratementioning

confidence: 99%

“…The conversion at 500 • C improved from 31.4% to 64.5% by H 2 extraction using silica membranes. The reaction conversion can be improved by extracting hydrogen with reports on ethane dehydorogenation [17], propane dehydrogenation [18], and methylcyclohexane dehydrogenation [19]. The larger the H 2 permeance of the membrane, the more it improves the membrane reactor.…”

Section: Introductionmentioning

confidence: 99%

“…The TMOS-derived membrane showed an H 2 /N 2 permeance ratio of about 500 with an H 2 permeance of 9.1 × 10 −8 mol m −2 s −1 Pa −1 , while the PrTMOS-derived membrane showed a lower H 2 /N 2 permeance ratio of 30 with higher a N 2 /SF 6 permeance ratio of 30. The precursors with methyl [23], ethyl [18,24], propyl [24,25], butyl [18,23], hexyl [1,18,[24][25][26][27], phenyl [28,29], 3-aminopropyl [23], and 3,3,3-trifluoropropyl [30] groups were investigated. Matsuyama et al [25] prepared the silica membrane via CVD using hexyltrimethoxysilane (HTMOS) as a precursor.…”

Section: Introductionmentioning

confidence: 99%

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The Evaluation of Counter Diffusion CVD Silica Membrane Formation Process by In Situ Analysis of Diffusion Carrier Gas

Ishii

Nomura

2022

Membranes

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A new evaluation method for preparing silica membranes by counter diffusion chemical vapor deposition (CVD) was proposed. This is the first attempt to provide new insights, such as the decomposition products, membrane selectivity, and precursor reactivity. The permeation of the carrier gas used for supplying a silica precursor was quantified during the deposition reaction by using a mass spectrometer. Membrane formation processes were evaluated by the decrease of the permeation of the carrier gas derived from pore blocking of the silica deposition. The membrane formation processes were compared for each deposition condition and precursor, and the apparent silica deposition rates from the precursors such as tetramethoxysilane (TMOS), hexyltrimethoxysilane (HTMOS), or tetraethoxysilane (TEOS) were investigated by changing the deposition temperature at 400–600 °C. The apparent deposition rates increased with the deposition temperature. The apparent activation energies of the carrier gas through the TMOS, HTMOS, and TEOS derived membranes were 44.3, 49.4, and 71.0 kJ mol−1, respectively. The deposition reaction of the CVD silica membrane depends on the alkoxy group of the silica precursors.

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Non-oxidative propane dehydrogenation in membrane reactors

Pan,

Bhowmick,

Liu

et al. 2024

Catalysis

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Propylene (C3H6) is a building block for important petrochemicals production such as polypropylene and acrylonitrile. Propylene is traditionally produced as a co-product in steam crackers (SC) and as a by-product in fluid catalytic cracking (FCC) units. A growing gap between the supply and demand for C3H6 is expected in the foreseeable future. On-purpose C3H6 production, such as non-oxidative propane dehydrogenation (PDH), is considered as a suitable technology to bridge the gap between conventional processes (SC and FCC) and the demand for C3H6. However, the PDH process faces challenges due to its endothermic nature. Membrane reactors, consisting of PDH catalysts and H2-permeable membranes, have the potential to improve C3H6 yield. The key feature of the implemented PDH membrane reactor is that the catalyst activates C3H8 to form C3H6, while the membrane continuously removes H2 to influence C3H8 equilibrium conversion. This chapter provides a summary of past research and ongoing developments in PDH reactions in membrane reactors. The content covers the membrane material, catalyst, reactor configuration, and performance for PDH in membrane reactors. Furthermore, the challenges and strategies to mitigate reactor performance decline during PDH are presented, along with future research and development directions to advance this technology for on-purpose C3H6 production.

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Development of Hydrogen Permselective Membranes for Propylene Production

Cited by 3 publications

References 22 publications

Advances in surface modification and functionalization for tailoring the characteristics of thin films and membranes via chemical vapor deposition techniques

Advances in surface modification and functionalization for tailoring the characteristics of thin films and membranes via chemical vapor deposition techniques

The Evaluation of Counter Diffusion CVD Silica Membrane Formation Process by In Situ Analysis of Diffusion Carrier Gas

Non-oxidative propane dehydrogenation in membrane reactors

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