High pressure performance of thin Pd–23%Ag/stainless steel composite membranes in water gas shift gas mixtures; influence of dilution, mass transfer and surface effects on the hydrogen flux

Peters, Thijs; Stange, M.; Klette, H.; Bredesen, Rune

doi:10.1016/j.memsci.2007.08.056

Cited by 206 publications

(103 citation statements)

References 19 publications

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“…However, coupling the reaction with a H2-selective membrane can break the equilibrium constrains and facilitate the CO conversion, thus intensifying the process and resulting in economically beneficial application. Besides Pd-or Pd-Ag alloys membranes [208][209][210][211] and silica-based membranes [212,213], zeolite membranes are subject of intensive research interest for the present problem.…”

Section: Hydrogen Permeation In Water Gas Shift Reactionmentioning

confidence: 99%

Zeolite Membranes in Catalysis—From Separate Units to Particle Coatings

Dragomirova

Wohlrab

2015

Catalysts

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Literature on zeolite membranes in catalytic reactions is reviewed and categorized according to membrane location. From this perspective, the classification is as follows: (i) membranes spatially decoupled from the reaction zone; (ii) packed bed membrane reactors; (iii) catalytic membrane reactors and (iv) zeolite capsuled catalyst particles. Each of the resulting four chapters is subdivided by the kind of reactions performed. Over the whole sum of references, the advantage of zeolite membranes in catalytic reactions in terms of conversion, selectivity or yield is evident. Furthermore, zeolite membrane preparation, separation principles as well as basic considerations on membrane reactors are discussed.

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Section: Hydrogen Permeation In Water Gas Shift Reactionmentioning

confidence: 99%

Zeolite Membranes in Catalysis—From Separate Units to Particle Coatings

Dragomirova

Wohlrab

2015

Catalysts

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“…Additionally, this type of membranes provides the best selectivity-flux combination of all the membrane classes [20]. The drawback with Pd-alloy membranes is, however, that they are to various degrees prone to reduced H2 permeation rates (poisoning) by the presence of strongly adsorbing species such as CO and sulphur, that block the H2 dissociation sites [22]- [29], or even to complete deterioration of the membrane as in case of sulphur [30]- [32]. Sulphur removal after coal gasification is therefore critical for utilizing the full potential of Pd-alloy based membrane technology.…”

Section: H2 Separation Using Pd-alloy Membranesmentioning

confidence: 99%

“…As separation through the membrane occurs, a H2-depleted layer is built up on the feed side, reducing the efficient partial pressure of H2 at the membrane surface, and thereby also the gradient in H2 partial pressure that sustains the flux through the membrane [22]. This effect is usually referred to as concentration polarisation.…”

Section: H2 Separation Using Pd-alloy Membranesmentioning

confidence: 99%

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High-purity H2 production with CO2 capture based on coal gasification

Jordal

Anantharaman

Peters

et al. 2015

Energy

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A novel hybrid concept is proposed, combining Pd-alloy membrane and low temperature separation technology, to produce pure H2 from gasified coal and capture the main part of the generated CO2. 75% of the H2 produced from gasification and water-gas shift is separated from the shifted syngas through H2-selective Pd-alloy membranes. After water removal, the H2-depleted, CO2-rich retentate stream is compressed and cooled, after which CO2 is condensed out at a purity level of ~99%. The "waste" volatiles from the low-temperature CO2 separation constitute a low heating value syngas that is burnt in a gas turbine. The gas turbine with a steam bottoming cycle generates a surplus of electricity that could be employed for H2 liquefaction. Altogether, the concept has the potential to be developed into a stand-alone high-purity H2 production unit with CO2 capture, suitable e.g. for remote areas from where H2 and possibly also CO2 must be transported by ship. However, the investigations of three different process alternatives, as well as three membrane separator parameters, illustrate that there are many degrees of freedom in the proposed concept that require further analysis, both individually and how they interact, in order to establish an optimized and purposeful stand-alone H2 production concept.

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“…One challenge associated with the design is the high resistance of the hydrogen flux through the thick membrane. With the development of fabrication technology, the separating layer can be split from its porous support with the membrane thickness reduced below 5 mm, which is known as self-support membrane [5]. More recently, a new concept of catalytic-support membrane has been reported [2,6,7].…”

Section: Introductionmentioning

confidence: 99%

Chemical and transport behaviors in a microfluidic reformer with catalytic-support membrane for efficient hydrogen production and purification

Xuan

Leung

et al. 2012

International Journal of Hydrogen Energy

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Membrane Autothermal reformingPorous media a b s t r a c t Microchannel reformer integrated with H 2 selective membrane offers an efficient, compact and portable way to produce hydrogen. The performance of a membrane-based microfluidic reformer is restricted by species diffusion limitation within the porous support of the membrane. Recent development in novel catalytic-supported membranes has the potential to enhance H 2 production by decimating the diffusion limitation.Loading a Pd-Ag layer on to a Ni-catalytic porous support, the membrane achieves both H 2 separation and production functions. In this study, a two-dimensional CFD model combined with chemical kinetics has been developed to simulate a microchannel autothermal reformer fed by methane. The species conversion and transport behaviors have been studied. The results show that the permeation process enhances the mass transport within the catalytic layer, and as a result, the reactions are intensified. Most notably, the effectiveness factor of the water-gas shift reaction as high as 6 is obtained.In addition, the effects of gaseous hourly space velocity (GHSV) on methane conversion and H 2 flux through the membrane are also discussed, and an optimal value of GHSV is suggested.

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High pressure performance of thin Pd–23%Ag/stainless steel composite membranes in water gas shift gas mixtures; influence of dilution, mass transfer and surface effects on the hydrogen flux

Cited by 206 publications

References 19 publications

Zeolite Membranes in Catalysis—From Separate Units to Particle Coatings

Zeolite Membranes in Catalysis—From Separate Units to Particle Coatings

High-purity H2 production with CO2 capture based on coal gasification

Chemical and transport behaviors in a microfluidic reformer with catalytic-support membrane for efficient hydrogen production and purification

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