High temperature permeation and separation characteristics of an all-silica DDR zeolite membrane

Bergh, Johan van den; Tihaya, Anna; Kapteijn, Freek

doi:10.1016/j.micromeso.2010.02.011

Cited by 105 publications

(77 citation statements)

References 43 publications

(73 reference statements)

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“…So far, there are many studies on the small pore-sized zeolite membranes for gas separation. 37,38 Comparing with literature data of mixed gas separation, the oriented AlPO 4 LTA membrane developed in this study are among those with high separation performances (Table S1, ESIw).…”

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confidence: 59%

Highly oriented, neutral and cation-free AlPO4 LTA: from a seed crystal monolayer to a molecular sieve membrane

Huang

Caro

2011

Chem. Commun.

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An oriented, neutral and cation-free AlPO 4 LTA molecular sieve membrane with high hydrogen selectivity was prepared on porous a-Al 2 O 3 supports through secondary growth of a highly oriented AlPO 4 LTA monolayer.Zeolites with their uniform pore structure and high thermal stability are widely used in the chemical industry as catalysts, ion exchangers and adsorbents.1 Apart from the use of zeolites as powders, supported zeolite layers are of interest for many potential applications as separators, reactors, sensors and electrical insulators. [2][3][4][5][6] It is well recognized that control of the microstructures of zeolite layers, such as grain orientation and grain boundaries, plays an important role in their performances. 2,7,8 Mostly, oriented zeolite layers exhibit superior performances compared to randomly oriented zeolite layers. Therefore, intense research efforts have been made towards the preparation of oriented zeolite layers, 10-13 mainly focused on the preparation of b-oriented MFI membranes.14-16 Lai et al. reported the synthesis of b-oriented MFI membranes with a high p-xylene/o-xylene selectivity of about 500.17 Highly b-oriented MFI membranes have been prepared by both direct in situ growth 18 and secondary growth. 19 The secondary growth method is considered to allow a better control of the growth of oriented zeolite films since the quality of the films is less influenced by the characteristics of the substrate, thus enhancing the reproducibility of membrane preparation. 20 For secondary growth of oriented membranes, a highly oriented monolayer of zeolite seeds is helpful.Much effort has been made to assemble zeolite crystals as an oriented seed monolayer. The preparation of a packed zeolite A monolayer was first realized by physical adsorption of the micro-crystals onto a substrate. 21 Recently, Yang et al. reported the deposition of highly b-oriented silicalite-1 seeds on various substrates by a Langmuir-Blodgett technique. 16,22 Pre-treated zeolite crystals were also chemically attached on substrates for the fabrication of an oriented monolayer by a simple ionic or covalent bonding. 23 Another great contribution for the assembling of an oriented zeolite monolayer with dense packing was achieved by introducing dual covalent bonds between the zeolite crystals and the substrate. Yoon and coworkers have developed a novel ''two-component modification'' strategy for the assembly of a highly oriented LTA and MFI zeolite films on glass slides via covalent linkages, 24-26 where the reactive groups on the substrate surfaces were effectively linked to the matching groups on the zeolite crystals to yield a uniform and oriented zeolite monolayer with high coverage and close packing. However, these covalent linkages are not suitable for the assembly of large-sized zeolite crystals (usually smaller than 3 mm).27 Further, a rather long reaction time (usually several hours) is required to obtain a high coverage monolayer.28 Therefore, the development of a simple, effective and versatile road to assemble high...

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supporting

confidence: 59%

Highly oriented, neutral and cation-free AlPO4 LTA: from a seed crystal monolayer to a molecular sieve membrane

Huang

Caro

2011

Chem. Commun.

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“…The membrane permeance already includes the effect of thickness, so the required permeance can be achieved both by appropriate material selection and by controlling the membrane thickness. Considering that the high-temperature H 2 permeance range of zeolite membranes [45][46][47] it appears that the required properties can be easily achieved for the target conversion at low WHSV <1 h 21 . However, if a larger WHSV (>2 h 21 ) is used, medium-pore or Knudsen membranes will not be recommended as they cannot achieve the target conversion (Table 1).…”

Section: Required Membrane Properties For a Target Conversionmentioning

confidence: 99%

Material properties and operating configurations of membrane reactors for propane dehydrogenation

et al. 2014

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A modeling-based approach is presented to understand physically realistic and technologically interesting material properties and operating configurations of packed-bed membrane reactors (PBMRs) for propane dehydrogenation (PDH). PBMRs composed of microporous or mesoporous membranes combined with a PDH catalyst are considered. The influence of reaction and membrane transport parameters, as well as operating parameters such as sweep flow and catalyst placement, are investigated to determine desired "operating windows" for isothermal and nonisothermal operation. Higher Damk€ ohler (Da) and lower P eclet (Pe) numbers are generally helpful, but are much more beneficial with highly H 2 -selective membranes rather than higher-flux, lower-selectivity membranes. H 2 -selective membranes show a plateau region of conversion that can be overcome by a large sweep flow or countercurrent operation. The latter shows a complex trade-off between kinetics and permeation, and is effective only in a limited window. H 2 -selective PBMRs will greatly benefit from the fabrication of thin ($1 mm or less) membranes.

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“…There were excellent performances of membranes, both in selectivity and permeability, exhibited, which were over 4000 and 1.0 × 10 -7 mol/(m 2 sPa) at 101 kPa and 225 K [126] . The separation performances of DDR membranes were maintained after several months of testing, including continuous testing for ~5 days at high temperature and numerous (>10) full temperature cycles [124] . By considering their long-term stability and high CO 2 selectivities/fl uxes, the DD3R membranes were strongly suggested with potential fl for high-temperature CO 2 separation [124] .…”

Section: Zeolitesmentioning

confidence: 99%

“…The separation performances of DDR membranes were maintained after several months of testing, including continuous testing for ~5 days at high temperature and numerous (>10) full temperature cycles [124] . By considering their long-term stability and high CO 2 selectivities/fl uxes, the DD3R membranes were strongly suggested with potential fl for high-temperature CO 2 separation [124] . SAPO-34 structure is a silicoaluminophosphate zeolite with the composition of Si x Al y l P z O 2 , where x = 0.01 -0.98, y = 0.01 -0.60, and z = 0.01 -0.52 z [127] .…”

Section: Zeolitesmentioning

confidence: 99%

CO2 Selective Separation Membranes

Yao

Wang

2013

Eco- And Renewable Energy Materials

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Over the past two decades, membrane technology has attracted tremendous attention at CO 2 separation from other gases, which has shown great potential to significantly improve energy efficiency and reduce cost associated with processes. The membrane structures and chemistry properties greatly affect their CO 2 separation performances, including selectivity and permeability. In recent years, there has been significant progress in the development of CO 2 -selective membranes. This chapter reviewed the recent activities relating to the fabrication and separation performances of polymeric, inorganic and mixed-matrix membranes for CO 2 separation purposes.

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High temperature permeation and separation characteristics of an all-silica DDR zeolite membrane

Cited by 105 publications

References 43 publications

Highly oriented, neutral and cation-free AlPO4 LTA: from a seed crystal monolayer to a molecular sieve membrane

Highly oriented, neutral and cation-free AlPO4 LTA: from a seed crystal monolayer to a molecular sieve membrane

Material properties and operating configurations of membrane reactors for propane dehydrogenation

CO2 Selective Separation Membranes

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