Process development for generating high purity hydrogen by using supported palladium membrane reactor as steam reformer

Lin, Yu-Ming; Rei, Min-Hon

doi:10.1016/s0360-3199(99)00047-6

Cited by 115 publications

(39 citation statements)

References 19 publications

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“…Especially low temperature fuel cells such as proton exchange membrane (PEM) fuel cells for small-scale applications impose high purity requirements of the hydrogen since the electrodes are very sensitive to poisoning by several contaminants (CO, sulfur) [2] and [3]. Integration of a supported membrane with a steam reformer exhibits considerable promise for generating high purity hydrogen [4]. Desired Cu based steam reforming catalysts combine high activity with high selectivity towards hydrogen even at moderate temperatures (473-573 K).…”

Section: Introductionmentioning

confidence: 99%

Microstructural characterization of Cu/ZnO/Al2O3 catalysts for methanol steam reforming—A comparative study

Kurr

Kasatkin

Girgsdies

et al. 2008

Applied Catalysis A: General

113

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Microstructural characteristics of various real Cu/ZnO/Al 2 O 3 catalysts for methanol steam reforming (MSR) were investigated by in situ X-ray diffraction (XRD), in situ X-ray absorption spectroscopy (XAS), temperature programmed reduction (TPR) and electron microscopy (TEM). Structure-activity correlations of binary Cu/ZnO model catalysts were compared to microstructural properties of the ternary catalysts obtained from in situ experiments under MSR conditions. Similar to the binary system, in addition to a high specific copper surface area the catalytic activity of Cu/ZnO/Al 2 O 3 catalysts is determined by defects in the bulk structure. The presence of lattice strain in the copper particles as the result of an advanced Cu-ZnO interface was detected only for the most active Cu/ZnO/Al 2 O 3 catalyst in this study. Complementarily, a highly defect rich nature of both Cu and ZnO has been found in the short-range order structure (XAS). Conventional TPR and TEM investigations confirm a homogeneous microstructure of Cu and ZnO particles with a narrow particle size distribution. Conversely, a heterogeneous microstructure with large copper particles and a pronounced bimodal particle size distribution was identified for the less active catalysts. Apparently, lattice strain in the copper nanoparticles is an indicator for a homogeneous microstructure of superior Cu/ZnO/Al 2 O 3 catalyst for methanol chemistry.

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Section: Introductionmentioning

confidence: 99%

Microstructural characterization of Cu/ZnO/Al2O3 catalysts for methanol steam reforming—A comparative study

Kurr

Kasatkin

Girgsdies

et al. 2008

Applied Catalysis A: General

113

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“…However, because the Cu-based catalysts are in general very prone to deactivation by thermal sintering, there is a need for the development of new catalysts that are more thermally stable for use in metal integrated membrane steam reformer. Combining a palladium membrane with a methanol reformer shows considerable promise for generating high purity H 2 in terms of energy efficiency, system simplicity, and compactness [6,7]. Desired catalyst characteristics include high activity and stability in the temperature range of 300-400°C, which is higher than current commercial Cu-based catalysts, can endure.…”

Section: Introductionmentioning

confidence: 99%

Methanol Steam Reforming Over NiAl and Ni (M) Al Layered Double Hydroxides (M = Au, Rh, Ir) Derived Catalysts

Amphlett

Peppley

2005

Catal Lett

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This paper deals with an experimental investigation concerning steam reforming of methanol at 280, 340 and 380°C over NiAl and Ni (Au, Rh or Ir)Al layered double hydroxides (LDHs) derived catalysts. Incorporation of noble metal ions into the NiAl-LDH framework was evidenced by XRD, TGA and TEM techniques. High selectivity to H 2 and CO 2 with less than 5% (volume) CO and trace CH 4 was observed over the NiAl-LDH catalyst. Whereas CO and H 2 are major products at lower temperatures after addition of Au, Rh and Ir to the NiAl-LDH system. They are significantly reduced with the concomitant increase in CH 4 and CO 2 as the temperature increased.

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“…and Han et al [23,24]. In this joint project, the Chinese partner is concerned with the development of appropriate, thermally stable, reforming catalysts.…”

Section: Aim Of the Projectmentioning

confidence: 99%

Ceramic Supported Capillary Pd Membranes for Hydrogen Separation: Potential and Present Limitations

et al. 2006

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Composite ceramic capillaries coated with thin palladium membranes are developed for the production of CO‐free hydrogen for PEM fuel cells, via alcohol steam reforming. The composite membranes are tested for pure H2 and N2, as well as for synthetic reformate gas. The aim is to develop a heat‐integrated compact membrane reformer for decentralized hydrogen production. In this context, a deep knowledge of the performance, behavior, and necessary treatment of the composite palladium membranes plays a decisive role in process design. The current contribution focuses on the main hurdles met while attempting to exploit the potential of ceramic supported capillary palladium membranes.

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Process development for generating high purity hydrogen by using supported palladium membrane reactor as steam reformer

Cited by 115 publications

References 19 publications

Microstructural characterization of Cu/ZnO/Al2O3 catalysts for methanol steam reforming—A comparative study

Microstructural characterization of Cu/ZnO/Al2O3 catalysts for methanol steam reforming—A comparative study

Methanol Steam Reforming Over NiAl and Ni (M) Al Layered Double Hydroxides (M = Au, Rh, Ir) Derived Catalysts

Ceramic Supported Capillary Pd Membranes for Hydrogen Separation: Potential and Present Limitations

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