This review highlights various aspects of current palladium membrane research and serves as a comprehensive bibliography covering palladium membrane preparation methods and applications. There are many promising uses for palladium membranes, although widespread use of the available technologies is constrained primarily by the high cost of palladium, lack of durability due to hydrogen embrittlement, and susceptibility to fouling. Various researchers in the field are tackling these problems and fabricating thinner palladium alloy composite membranes that better withstand contaminantion and thermal cycling. What has been accomplished to address these issues and the directions presently being explored are discussed.

Innovations in palladium membrane research

Application of a Pd–Ru composite membrane to hydrogen production in a high temperature membrane reactor

Identification of thermally stable Pd-alloy composite membranes for high temperature applications

The elution behaviors of CH4, C2H6, n-C3H8, iso-C4H10, Ar. O2, N2, and SF6 were studied in A-type zeolites containing K+, Na+, Li+, Sr2+, Ca2+, and Mg2+ and on a 10X zeolite. Temperature- and flow-dependent tailing of peaks and changes in retention volume with flow rate were found for those adsorbates able only to partially penetrate the pores. When diffusivities were large enough to allow total access to the pores, molecular size and the degree of adsorption for the adsorbate had significant effects — on HETP values.

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Effects of slow mass transfer when using microporous adsorbents in gas-- solid chromatography.

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Synthesis and characterization of thermally stable palladium-based composite membranes for high temperature applications

1. 1. Hydrogen transfer to the zone of hydrogenation of cyclopentadiene through a membrane catalyst from a Pd alloy with 10 vol. % Ru increases the rate and selectivity of hydrogenation to cyclopentene, compared with the experiment carried out at the same temperature and partial reagent pressure, but without hydrogen transfer to the membrane catalyst. 2. 2. Joining dehydrogenation of isopropyl alcohol and hydrogenation of cyclopentadiene increases even more the rate of both reactions, the selectivity of conversion of cyclopentadiene to cyclopentene and increases the amount of hydrogen formed during dehydrogenation of alcohol that is passed through the membrane.

Effect of hydrogen transfer through a membrane catalyst from a Pd-Ru alloy on the rate of dehydrogenation of isopropanol and hydrogenation of cyclopentadiene

Ye.V. Khrapova

Papers

Effect of hydrogen transfer through a membrane catalyst from a Pd-Ru alloy on the rate of dehydrogenation of isopropanol and hydrogenation of cyclopentadiene

Chromatographic determination of the heats of adsorption of lower hydrocarbons on type 5A zeolites