Defect‐free palladium membranes on porous stainless‐steel support

Mardilovich, Peter; She, Ying; Hua, Yi; Rei, Min-Hon

doi:10.1002/aic.690440209

Cited by 312 publications

(174 citation statements)

References 31 publications

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“…Before surface modification, the PSS tubes were cleaned in an ultrasonic bath at 60 C and in an alkaline solution to remove any surface contaminants. The PSS tubes were then rinsed with isopropanol and left to dry overnight at 120 C. The exact compositions of solutions used during this study may be found in (Mardilovich et al 1998).…”

Section: Methodsmentioning

confidence: 99%

“…Palladium was then deposited onto the PSS substrates using electroless plating. Details of the procedure can be found elsewhere (Mardilovich et al 1998). The dense Pd-based composite tube was heated to 500 C in helium at a rate of 1 C/min.…”

Section: Methodsmentioning

confidence: 99%

“…However, thinner Pd membranes cannot endure highpressure reaction conditions. Therefore, thin Pd membranes are usually prepared on porous substrates in composite form to provide a high hydrogen permeance (Mardilovich et al 1998). Porous stainless steel (PSS) has many favorable characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Thin Pd membrane on a modified porous stainless steel tube: Al₂O₃particle size selection strategy

Chi

Hsu

Huang

et al. 2011

Journal of the Chinese Institute of Engineers

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Palladium (Pd) membranes for hydrogen separation were deposited on modified porous stainless steel (PSS) tubes using the electroless plating technique. This study explores the hydrogen permeance influenced by the effect of reducing the thickness of the Pd membrane using different sizes of Al 2 O 3 particles, 10 and 1 mm, to modify the pores on the PSS surface. The pore size on the surface of the PSS tubes modified with 10 mm Al 2 O 3 particles decreased from 10 $ 20 mm to less than 5 mm, while the surface of the PSS, modified by 1 mm Al 2 O 3 , was very dense and smooth. Generally, the supporting tubes with smaller pore size on the surface give thinner Pd membrane. The minimum thickness of a dense Pd membrane decreased from 35.1 to 16.2 mm when using 1 mm Al 2 O 3 particles to modify the PSS tubes, but the maximum hydrogen permeance was enhanced from 15.3 to 34.7 m 3 /m 2 h atm 0.5 at 500 C by using 10 mm Al 2 O 3 particles. This evidence demonstrated the hydrogen permeance has a trade-off between the porosity (effective passages) and thickness of the Pd membranes since both are influenced by the Al 2 O 3 particle size used in the surface modification. These results suggested a promising and simple approach to produce a Pd membrane with high hydrogen permeance.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Thin Pd membrane on a modified porous stainless steel tube: Al₂O₃particle size selection strategy

Chi

Hsu

Huang

et al. 2011

Journal of the Chinese Institute of Engineers

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“…mL . L -1 ) was used as a reducing agent (Mardilovich et al, 1998). Two cycles of electroless plating were performed in order to achieve a highly selective and defect-free Pd membrane.…”

Section: Palladium Membrane Deposition By Electroless Platingmentioning

confidence: 99%

A catalytic hollow fibre membrane reactor for combined steam methane reforming and water gas shift reaction

Gil

Chadwick

et al. 2015

Chemical Engineering Science

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A catalytic hollow fibre membrane reactor (CHFMR) was developed in this study for combined steam methane reforming (SMR) and water gas shift (WGS) reaction. This is achieved by incorporating a Ni/SBA-15 catalyst into a plurality of micro-channels with open entrance from inner surface of Al 2 O 3 hollow fibres, followed by coating of a 3.3 µm Pd membrane on the outer surface of the hollow fibre using an electroless plating method. In addition to systematic characterizations of each reactor component, i.e. Ni/SBA-15 catalyst, micro-structured ceramic hollow fibre and Pd separating layer, the effect of how the reactor was assembled or fabricated on the catalytic performance was evaluated. Electroless plating of the Pd membrane impaired the catalytic performance of the deposited Ni/SBA-15 catalyst. Also, the over-removal of hydrogen from the reaction zone was considered as the main reason for the deactivation of the Ni-based catalyst. Instead of mitigating such deactivation using "compensating" hydrogen, starting the reaction at higher temperatures was found more efficient in improving the reactor performance, due to a better match between hydrogen production (from the reaction) and hydrogen removal (from the Pd membrane). An effective methane conversion of approximately 53 %, a CO 2 selectivity of 94 % and a H 2 recovery of 43% can be achieved at 560 °C. In order for a more significant "shift" phenomenon, alternative methodology of fabricating the reactor and more coke resistant catalysts are recommended.

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“…7 While the focus of metal hydride thin-fi lm research has been on the discovery of new material compositions, it can also be used to study the effect of doping, 8 interface energy, 9 and the elastic and plastic effects of clamping a nanomaterial to a matrix. 10 Besides hydrogen storage, metal hydrides are used in heat storage applications, 11 separation membranes, 12 hydrogen sensors, 13 and smart window applications. 14 , 15 Here, we focus on the last two applications.…”

Section: Introductionmentioning

confidence: 99%

Metal hydrides for smart window and sensor applications

2013

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The hydrogenation of metals often leads to changes in optical properties in the visible range. This allows for fundamental studies of the hydrogenation process, as well as the exploration of various applications using these optical effects. Here, we focus on recent developments in metal hydride-based optical fi ber and plasmonic sensors and smart windows. Both applications benefi t from the existence of a refl ective metallic state, which is lost on hydrogenation and allows for large reversible optical changes. In this article, we review the status of both technologies and their prospects for applications.

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Defect‐free palladium membranes on porous stainless‐steel support

Abstract: Defect-pee Pd membranes were prepared by an electroless plating

Cited by 312 publications

References 31 publications

Thin Pd membrane on a modified porous stainless steel tube: Al₂O₃particle size selection strategy

Thin Pd membrane on a modified porous stainless steel tube: Al₂O₃particle size selection strategy

A catalytic hollow fibre membrane reactor for combined steam methane reforming and water gas shift reaction

Metal hydrides for smart window and sensor applications

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Defect‐free palladium membranes on porous stainless‐steel support

Abstract: Defect-pee Pd membranes were prepared by an electroless plating

Cited by 312 publications

References 31 publications

Thin Pd membrane on a modified porous stainless steel tube: Al2O3particle size selection strategy

Thin Pd membrane on a modified porous stainless steel tube: Al2O3particle size selection strategy

A catalytic hollow fibre membrane reactor for combined steam methane reforming and water gas shift reaction

Metal hydrides for smart window and sensor applications

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Product

Resources

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Thin Pd membrane on a modified porous stainless steel tube: Al₂O₃particle size selection strategy

Thin Pd membrane on a modified porous stainless steel tube: Al₂O₃particle size selection strategy