Pd/ceramic hollow fibers for H2 separation

Pan, Xiulian; Stroh, N.; Brunner, Herwig; Xiong, Guoxing; Sheng, Shishan

doi:10.1016/s1383-5866(03)00071-6

Cited by 54 publications

(27 citation statements)

References 18 publications

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“…However, the use of ceramic hollow fibres, instead of finite tubes, allows a higher ratio between the surface area and volume of the membrane system. Pan et al (2003) managed to fabricate and employ Al 2 O 3 hollow fibre with much higher packing density (as high as 1000m 2 /m 3 ).…”

Section: Introductionmentioning

confidence: 99%

Characterisation of Asymmetric Alumina Hollow Fibre Membranes

Lemos¹,

Silva²,

Reis

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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-Ceramic membranes are widely used for separations. They can be configured as flat discs, finite tubes or hollow fibres. Hollow fibres present some advantages such as the higher ratio between membrane and system areas. Moreover, the asymmetric structure, presenting regions of different pore sizes, should be carefully prepared in order to achieve greater permeabilities. Here we analyze the permeability and the morphology of asymmetric alumina hollow fibres which were prepared at different conditions. The hollow fibres were fabricated using the phase inversion/sintering method. Different internal coagulants and sintering temperatures were applied. The hollow fibres were characterised by scanning electronic microscopy, water and nitrogen permeations and mechanical strength. The obtained results showed that more fingers are obtained when solvent mixed with water is used as internal coagulant, instead of pure water. As consequence, these membranes presented greater permeabilities. The permeability also increased with the decrease in the sintering temperature. However, the decrease in the sintering temperature decreased the mechanical strength of the fibre. In conclusion, more permeable asymmetric hollow fibres were obtained using solvent as internal coagulant and applying lower sintering temperatures.

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Section: Introductionmentioning

confidence: 99%

Characterisation of Asymmetric Alumina Hollow Fibre Membranes

Lemos¹,

Silva²,

Reis

et al. 2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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“…Due to the easy operability of electroless plating, a lot of investigations have been focused on the preparation of a thin Pd membrane using electroless plating [13][14][15][16][17]. Pan et al [13] successfully prepared a thin Pd membrane with 2-3 m thick on a porous alumina hollow fiber and their membrane showed the H 2 /N 2 separation factor over 1000.…”

Section: Introductionmentioning

confidence: 99%

“…Pan et al [13] successfully prepared a thin Pd membrane with 2-3 m thick on a porous alumina hollow fiber and their membrane showed the H 2 /N 2 separation factor over 1000. However, they employed a γ-alumina intermediate layer on the α-alumina hollow fiber and the very small pore size of the γ-alumina could achieve the thin Pd membrane with good performance.…”

Section: Introductionmentioning

confidence: 99%

Preparation of thin and dense electroless-plated Pd membrane by controlling Pd deposition behavior

Miyamoto

Okuda

Oumi

et al. 2011

Trans. Mat. Res. Soc. Japan

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Electroless Pd plating at different deposition temperatures was investigated to control Pd deposition behavior for preparing a much thinner Pd membrane to reduce Pd usage and achieve high hydrogen permeation flux. The deposition temperature directly influenced on the membrane thickness uniformity and defect formation. In our experimental condition, a thin Pd electroless-plated membrane with a thickness of 3 m could be prepared at 333 K using a formic acid bath. It was found that this membrane showed no leakage of helium and high H 2 permeation flux. The rate-limiting step of Pd deposition during the electroless plating must be one of the important factors for preparing the thinner Pd plating membrane with no pinholes.

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“…1-2) A Pd-dense membrane can separate high-purity H 2 by ionic conduction mechanism; however, it has a low permeability. [3][4] Porous membranes using zeolite and silica have high gas permeability and selectivity; [5][6][7][8] however, the structure of the membranes becomes rapidly unstable at high temperature and under steam condition. Non-oxide ceramics such as silicon carbide (SiC) -and silicon nitride (Si 3 N 4 ) -based materials are promising for high temperature gas separation due to its high thermal and chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Gas Permeation of SiC Membrane Coated on Multilayer γ-Al2O3 with a Graded Structure for H2 Separation

Yoon¹,

Kim²,

Kim³

et al. 2010

Korean. J. Mater. Res.

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A promising candidate material for a H 2 permeable membrane is SiC due to its many unique properties. A hydrogen-selective SiC membrane was successfully fabricated on the outer surface of an intermediate multilayer γ-Al 2 O 3 with a graded structure. The γ-Al 2 O 3 multilayer was formed on top of a macroporous α-Al 2 O 3 support by consecutively dipping into a set of successive solutions containing boehmite sols of different particle sizes and then calcining. The boehmite sols were prepared from an aluminum isopropoxide precursor and heated to 80 o C with high speed stirring for 24 hrs to hydrolyze the precursor. Then the solutions were refluxed at 92 o C for 20 hrs to form a boehmite precipitate. The particle size of the boehmite sols was controlled according to various experimental parameters, such as acid types and acid concentrations. The topmost SiC layer was formed on top of the intermediate γ-Al 2 O 3 by pyrolysis of a SiC precursor, polycarbosilane, in an Ar atmosphere. The resulting amorphous SiC-on-Al 2 O 3 composite membrane pyrolyzed at 900 o C possessed a high H 2 permeability of 3.61 × 10 −7 mol·m −2 ·s −1 ·Pa −1 and the H 2 /CO 2 selectivity was much higher than the theoretical value of 4.69 in all permeation temperature ranges. Gas permeabilities through a SiC membrane are affected by Knudsen diffusion and a surface diffusion mechanism, which are based on the molecular weight of gas species and movement of adsorbed gas molecules on the surface of the pores.

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Pd/ceramic hollow fibers for H2 separation

Cited by 54 publications

References 18 publications

Characterisation of Asymmetric Alumina Hollow Fibre Membranes

Characterisation of Asymmetric Alumina Hollow Fibre Membranes

Preparation of thin and dense electroless-plated Pd membrane by controlling Pd deposition behavior

Gas Permeation of SiC Membrane Coated on Multilayer γ-Al2O3 with a Graded Structure for H2 Separation

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