Chapter 6 Preparation of asymmetric ceramic membrane supports by dip-coating

Bonekamp, B.C.

doi:10.1016/s0927-5193(96)80009-x

Cited by 60 publications

(37 citation statements)

References 35 publications

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“…Supported mesoporous c-alumina membranes were prepared by a dip-coating procedure of a boehmite sol on a 30 cm long tubular a-alumina support system (ID/OD = 8/14 mm, 40 cm 2 , obtained commercially from TAMI) [20]. The freshly prepared hybrid sol was coated onto this (EtO) 3 Si Si(OEt) 3 (EtO) 3 Si Si(OEt) 3 (EtO) 3 Si Si(OEt) 3 (EtO) 3 c-Al 2 O 3 layer.…”

Section: Membrane Preparationmentioning

confidence: 99%

Evaluation of hybrid silica sols for stable microporous membranes using high-throughput screening

Kreiter

Rietkerk

Castricum

et al. 2010

J Sol-Gel Sci Technol

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Microporous membranes are a promising option for energy-efficient molecular separations. Longterm hydrothermal stability of the membrane material is of prime importance for several industrial processes. Here, a short overview of silica-based membrane materials and their hydrothermal stability is presented. Following this, the development of a series of organic-inorganic hybrid silica sols is described, based on a,x-bis(triethoxysilyl)-precursors with bridging methane, ethane, propane, and benzene groups. High-throughput screening was used to scan a range of sol parameters, followed by membrane preparation from the most promising sols. These organicinorganic hybrid silica (HybSi Ò ) membranes were used in dewatering of lower alcohols by pervaporation. Separation factors up to 200 were found for ethanol/water mixtures, and up to 23 for methanol/water mixtures. Modest permselectivity values for hydrogen over nitrogen were found, ranging up to 20.7 for the shortest bridging group. It was concluded that the length of the organic bridge has a clear effect on the pore size distribution and the selectivity of the membrane.

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Section: Membrane Preparationmentioning

confidence: 99%

Evaluation of hybrid silica sols for stable microporous membranes using high-throughput screening

Kreiter

Rietkerk

Castricum

et al. 2010

J Sol-Gel Sci Technol

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“…The support quality plays a major role in the final morphology of the silica derived films as its homogeneity is fundamental in preparing thin films without defects. To achieve this aim, the substrate must have (i) small pore sizes, (ii) low surface roughness and (iii) low defect or void concentration [43]. Substrates with large pores, voids and rough surfaces tend to induce mechanical stress in the films resulting in micro-cracks or pin-hole defects.…”

Section: Membrane Preparationmentioning

confidence: 99%

Microporous Silica Based Membranes for Desalination

Elma

Yacou

Wang

et al. 2012

Water

100

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Abstract:This review provides a global overview of microporous silica based membranes for desalination via pervaporation with a focus on membrane synthesis and processing, transport mechanisms and current state of the art membrane performance. Most importantly, the recent development and novel concepts for improving the hydro-stability and separating performance of silica membranes for desalination are critically examined. Research into silica based membranes for desalination has focussed on three primary methods for improving the hydro-stability. These include incorporating carbon templates into the microporous silica both as surfactants and hybrid organic-inorganic structures and incorporation of metal oxide nanoparticles into the silica matrix. The literature examined identified that only metal oxide silica membranes have demonstrated high salt rejections under a variety of feed concentrations, reasonable fluxes and unaltered performance over long-term operation. As this is an embryonic field of research several target areas for researchers were discussed including further improvement of the membrane materials, but also regarding the necessity of integrating waste or solar heat sources into the final process design to ensure cost competitiveness with conventional reverse osmosis processes.

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“…Slurry and dip-coating processes are used in the manufacturing of ceramic membranes for catalyst deposition and water separation applications (Bonekamp, 1996, Chapter 6 Preparaton of Asymmetric Ceramic Membrane Supports by Dip-Coating).…”

Section: Potential To Produce a Structure That Meets Performance Targetsmentioning

confidence: 99%

Water-Gas-Shift Membrane Reactor for High-Pressure Hydrogen Production. A comprehensive project report (FY2010 - FY2012)

Klaehn¹,

Peterson²,

Orme³

et al. 2013

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Idaho National Laboratory (INL), GE Global Research (GEGR), and Western Research Institute (WRI) have successfully produced hydrogenselective membranes for water-gas-shift (WGS) modules that enable high-pressure hydrogen product streams. Several high performance (HP) polymer membranes were investigated for their gas separation performance under simulated (mixed gas) and actual syngas conditions. To enable optimal module performance, membranes with high hydrogen (H 2 ) selectivity, permeance, and stability under WGS conditions are required. The team determined that the VTEC PI 80-051 and VTEC PI 1388 (polyimide from Richard Blaine International, Inc.) are prime candidates for the H 2 gas separations at operating temperatures (~200°C). VTEC PI 80-051 was thoroughly analyzed for its H 2 separations under syngas processing conditions using more-complex membrane configurations, such as tube modules and hollow fibers. These membrane formats have demonstrated that the selected VTEC membrane is capable of providing highly selective H 2 /CO 2 separation (α = 7-9) and H 2 /CO separation (α = 40-80) in humidified syngas streams. In addition, the VTEC polymer membranes are resilient within the syngas environment (WRI coal gasification) at 200°C for over 1000 hours. The information within this report conveys current developments of VTEC PI 80-051 as an effective H 2 gas separations membrane for high-temperature syngas streams.iii ACKNOWLEDGEMENTS

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Chapter 6 Preparation of asymmetric ceramic membrane supports by dip-coating

Cited by 60 publications

References 35 publications

Evaluation of hybrid silica sols for stable microporous membranes using high-throughput screening

Evaluation of hybrid silica sols for stable microporous membranes using high-throughput screening

Microporous Silica Based Membranes for Desalination

Water-Gas-Shift Membrane Reactor for High-Pressure Hydrogen Production. A comprehensive project report (FY2010 - FY2012)

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