PdAu and PdAuAg composite membranes for hydrogen separation from synthetic water-gas shift streams containing hydrogen sulfide

Lewis, Amanda Elizabeth; Zhao, Hongbin; Syed, H. S.; Wolden, Colin A.; Way, J. Douglas

doi:10.1016/j.memsci.2014.04.022

Cited by 67 publications

(35 citation statements)

References 49 publications

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“…by mass gain after plating). This method was shown to be in good agreement when verified against other analytical techniques such as SEM and/or XRF [4,7,24]. All of the membranes had a room temperature nitrogen leak permeance of o1.00E À 9 mol/m 2 /s/Pa before testing.…”

Section: Resultssupporting

confidence: 52%

“…5, an equimolar mixture of hydrogen and nitrogen (50:50) was first introduced to establish a baseline for subsequent experiments to assess common operating issues such as concentration polarization and flux inhibition (upon exposure to carbon species) [7,27]. The average hydrogen flux under this 50:50 mixture was 0.43 mol/m 2 /s with an average hydrogen recovery of 81% at 550°C, 1.03 MPa feed pressure (permeate at local ambient conditions) and a space velocity of 387 h À 1 , as shown in Table 2.…”

Section: Thermal Stability In Water-gas Shift Gas Mixturesmentioning

confidence: 99%

“…Among the various types of hydrogen separating inorganic membranes, hydrogen-permeable metal membranes made of palladium (Pd) and its alloys are the most widely studied due to their high hydrogen permeability, chemical compatibility with many hydrocarbon containing gas streams, and theoretically infinite hydrogen selectivity [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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The influence of heat treatment on the thermal stability of Pd composite membranes

Hawa

Lundin

Paglieri

et al. 2015

Journal of Membrane Science

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Section: Resultssupporting

confidence: 52%

Section: Thermal Stability In Water-gas Shift Gas Mixturesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The influence of heat treatment on the thermal stability of Pd composite membranes

Hawa

Lundin

Paglieri

et al. 2015

Journal of Membrane Science

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“…They sandwiched the amorphous alloy ribbon between Pd-Pd, Ni-Ni, Pd-Ni (upstream-retentate side), and Ni-Pd (downstream-permeate side) coatings, showing that the Pd-coated retentate surfaces are resistant to poisoning by contaminant gases such as H2S and others, while on the permeate side a simple Ni coating may be used, as there is presence of only highly pure H2 gas. Lewis et al [50] showed that Pd-Au coating were more resistant to H2S contamination. Earlier studies on surface coatings of Ni were conducted by Chian et al [51] in 2005 obtained reasonable permeation rates at 653K.…”

Section: Catalytic Dissociation Of Hydrogen Molecules By Pd and Nmentioning

confidence: 99%

Developments in the Ni–Nb–Zr amorphous alloy membranes

et al. 2016

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Most of the global H2 production is derived from hydrocarbon-based fuels, and efficient H2/CO2 separation is necessary to deliver a high purity H2 product. Hydrogen-selective alloy membranes are emerging as a viable alternative to traditional pressure swing absorption processes as a means for H2/CO2 separation. These membranes can be formed from a wide range of alloys, and those based on Pd are the closest to commercial deployment. The high cost of Pd (USD ~31,000 kg -1 ), however, is driving the development of less-expensive alternatives, including inexpensive amorphous (Ni60Nb40)100-xZrx alloys. Amorphous alloy membranes can be fabricated directly from the molten state into continuous ribbons via melt spinning, and depending on the composition, can exhibit relatively high hydrogen permeability between 473 and 673 K. Here we review recent developments in these low-cost membrane materials, especially with respect to permeation behavior, electrical transport properties, and understanding of local atomic order. In a quest to further understand the nature of these solids, atom probe tomography has been performed, revealing amorphous Nb-rich and Zr-rich clusters embedded in, majority Ni matrix, whose compositions deviated from the nominal overall composition of the membrane.

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“…Though the sulfides could be desorbed using zinc oxide powder or high-temperature sulphur adsorbent [12,13], great damage was caused to the Pd membrane used in highly-pure hydrogen preparation [14]. Based on the development trend of the Pd membrane with sulfuration resistance, high hydrogen permeation and low cost [15][16][17][18][19][20][21][22], the study of the influence mechanisms of sulfides on the Pd membrane surface was necessary. Some valuable was necessary.…”

Section: Introductionmentioning

confidence: 99%

Influence of Hydrogen Sulfide and Redox Reactions on the Surface Properties and Hydrogen Permeability of Pd Membranes

et al. 2018

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Although hydrogen sulfide (H 2 S) was always a negative factor leading to the reduction of hydrogen permeability of palladium (Pd) membranes, its proper application could result in a positive effect. In this study, pure Pd membranes were firstly reacted with H 2 S at 23-450 • C, and then treated by redox reactions. Afterwards, the hydrogen permeability was tested under different reaction conditions using a hydrogen penetrant testing device. Moreover, both products and morphology changes occurred on the Pd membrane surface were analyzed using XRD, XPS and SEM. The results showed that H 2 S was dissociated to produce sulfides at 23 • C. With a rise of temperature, a regular change took place in the reaction products, morphology of the Pd membrane surface and hydrogen permeability. Adsorbed impurities such as sulfides and free carbon on the Pd membrane surface were removed by the redox treatment. The hydrogen permeability was improved by about 80% for the Pd membrane material subjected to the treatment method stated the above against the untreated one.

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PdAu and PdAuAg composite membranes for hydrogen separation from synthetic water-gas shift streams containing hydrogen sulfide

Cited by 67 publications

References 49 publications

The influence of heat treatment on the thermal stability of Pd composite membranes

The influence of heat treatment on the thermal stability of Pd composite membranes

Developments in the Ni–Nb–Zr amorphous alloy membranes

Influence of Hydrogen Sulfide and Redox Reactions on the Surface Properties and Hydrogen Permeability of Pd Membranes

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