Effect of a Pt–ZrO2 protection layer on the performance and morphology of Pd–Au alloy membrane during H2S exposure

Lee, Sung Wook; Oh, Duck Kyu; Park, Jin Woo; Lee, Chun Boo; Lee, Dong Hoon; Park, Jong Soo; Kim, Sung Hyun; Hwang, Kyung-Ran

doi:10.1016/j.jallcom.2015.03.210

Cited by 13 publications

(4 citation statements)

References 24 publications

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“…The diffusion bonded module was obtained by height 7.9 mm, and volume 37.9 cm 3 . In addition, the volume of the diffusion bonded module than the pre-studied frame-type module were decreased by 81.4% [ 23 ]. Even though diffusion bonding was entirely performed at a low-temperature of 450 °C, a Palladium fracture was generated due to high-vacuum conditions on the membrane surface.…”

Section: Discussionmentioning

confidence: 99%

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Hydrogen Purification from Compact Palladium Membrane Module Using a Low Temperature Diffusion Bonding Technology

Lee

Park

2020

Membranes

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This study investigates a compact palladium membrane module (CPMM) for hydrogen purification, assembled by diffusion bonding at a low-temperature (450 °C). This CPMM resulted in hydrogen (H2) flux of 18.3 mL cm−2 min−1 with H2/N2 selectivity of over 1100. The H2 purification test using a 60% H2/40% CO2 mixed gas confirmed that the CPMM can separate H2 with a concentration of more than 99%, with a pressure difference of 5 bar. Moreover, the volume of the diffusion bonded membrane module is decreased by 81.4% than the flame-type membrane module pre-studied in our laboratory.

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Section: Discussionmentioning

confidence: 99%

“…The palladium based membranes were manufactured by our laboratory using the preparation procedures explained in a previous work [ 22 , 23 ]. Palladium was deposited on the prepared Porous nickel support (PNS) (49.3 mm) at 450 °C, 20 mTorr under Ar using a DC/RF magnetron sputter (Korea Vacuum Tech Co., Ltd., Daegu, Korea).…”

Section: Methodsmentioning

confidence: 99%

Hydrogen Purification from Compact Palladium Membrane Module Using a Low Temperature Diffusion Bonding Technology

Lee

Park

2020

Membranes

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“…Zhao et al [ 161 ] observed that total hydrogen flux recovery is possible for Pd 81 Cu 19 at 500 °C after being exposed to 7 and 35 ppm of H 2 S. During inhibition with H 2 S, reduction of defects was found (i.e., largest H 2 /N 2 perm-selectivity). This effect might be related to sulfur segregation at the grain boundaries [ 162 ]. However, during regeneration, nitrogen leaks doubled and the selectivity halved (from 2369 to 1194) compared with the initial values before poisoning with hydrogen sulfide [ 161 ].…”

Section: Characteristics and Properties Of Membranes For Hydrogen mentioning

confidence: 99%

Recent Advances in Pd-Based Membranes for Membrane Reactors

et al. 2017

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Palladium-based membranes for hydrogen separation have been studied by several research groups during the last 40 years. Much effort has been dedicated to improving the hydrogen flux of these membranes employing different alloys, supports, deposition/production techniques, etc. High flux and cheap membranes, yet stable at different operating conditions are required for their exploitation at industrial scale. The integration of membranes in multifunctional reactors (membrane reactors) poses additional demands on the membranes as interactions at different levels between the catalyst and the membrane surface can occur. Particularly, when employing the membranes in fluidized bed reactors, the selective layer should be resistant to or protected against erosion. In this review we will also describe a novel kind of membranes, the pore-filled type membranes prepared by Pacheco Tanaka and coworkers that represent a possible solution to integrate thin selective membranes into membrane reactors while protecting the selective layer. This work is focused on recent advances on metallic supports, materials used as an intermetallic diffusion layer when metallic supports are used and the most recent advances on Pd-based composite membranes. Particular attention is paid to improvements on sulfur resistance of Pd based membranes, resistance to hydrogen embrittlement and stability at high temperature.

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“…In early studies, Pd-Au membranes were prepared by expensive metallurgical processes with a thickness ranging from 25 to 100 m and using intermediate layers [14]. More recently, supported thin Pd-Au alloy membranes were prepared by electroless plating or electroplating technique on different porous substrates, experimentally analyzing the hydrogen perm-selectivity performance and the chemical-physical resistance [15][16][17][18][19]. The intent of this work is to give an overview about Pd-based membranes, paying special attention to the preparation and characterization of composite Pd-alloyed membranes for hydrogen production (in membrane reactor modules), separation and purification.…”

Section: Introductionmentioning

confidence: 99%

A thin supported Pd-Au based membrane for hydrogen generation and purification: A case study

Iulianelli¹,

Huang²,

Basile³

2018

MMEP

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In this work, a composite membrane based on a thin Pd-Au metallic layer supported on a ceramic substrate was produced by electroless plating deposition with the intent of generating and, meanwhile, purifying hydrogen in a single stage. Permeation tests were performed with pure gases (H2, N2, CO2, CH4) on both of them by varying the temperature between 300 °C and 400 °C and the feed pressure from 150 to 250 kPa to evaluate the hydrogen perm-selectivity characteristics of the membrane. A reference H2/N2 ideal selectivity around 500 was reached at 400 °C and 50 kPa of transmembrane pressure and it remained stable up to 600 h under operation. The presence of defects on the metallic layer affected negatively the membrane performance in terms of H2 perm-selectivity, probably caused by the absence on an intermediate layer, which did not compensate the mechanical stress due to different thermal dilation coefficients within the metallic layer and the ceramic substrate.

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Effect of a Pt–ZrO2 protection layer on the performance and morphology of Pd–Au alloy membrane during H2S exposure

Cited by 13 publications

References 24 publications

Hydrogen Purification from Compact Palladium Membrane Module Using a Low Temperature Diffusion Bonding Technology

Hydrogen Purification from Compact Palladium Membrane Module Using a Low Temperature Diffusion Bonding Technology

Recent Advances in Pd-Based Membranes for Membrane Reactors

A thin supported Pd-Au based membrane for hydrogen generation and purification: A case study

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