Long-Term Stability of Thin-Film Pd-Based Supported Membranes
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2019-02-01
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Abstract
Membrane reactors have demonstrated a large potential for the production of hydrogen via reforming of different feedstocks in comparison with other reactor types. However, the long-term performance and stability of the applied membranes are extremely important for the possible industrial exploitation of these reactors. This study investigates the long-term stability of thin-film Pd-Ag membranes supported on porous Al2O3 supports. The stability of five similarly prepared membranes have been investigated for 2650 h, up to 600 °C and in fluidized bed conditions. Results show the importance and the contribution of the sealing of the membranes at temperatures up to 500 °C. At higher temperatures the membranes surface deformation results in pinhole formation and a consequent decrease in selectivity. Stable operation of the membranes in a fluidized bed is observed up to 450 °C, however, at higher temperatures the scouring action of the particles under fluidization causes significant deformation of the palladium surface resulting in a decreased selectivity.
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Publisher Copyright: © 2019 by the authors.
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Palladium based membranes , Membrane stability , Membrane reactors , Fluidized bed , Hydrogen production , Palladium based membranes , Membrane stability , Membrane reactors , Fluidized bed , Hydrogen production , Bioengineering , Chemical Engineering (miscellaneous) , Process Chemistry and Technology , Project ID , info:eu-repo/grantAgreement/EC/H2020/671459/EU/BIOgas membrane reformer for deceNtralIzed hydrogen produCtiOn/BIONICO , info:eu-repo/grantAgreement/EC/H2020/671459/EU/BIOgas membrane reformer for deceNtralIzed hydrogen produCtiOn/BIONICO , Funding Info , The presented work is funded within BIONICO. This project has received funding from the Fuel Cells_x000D_ and Hydrogen 2 Joint Undertaking under grant agreement No 671459. This Joint Undertaking receives support_x000D_ from the European Union’s Horizon 2020 Research and Innovation Programme, Hydrogen Europe and N.ERGHY. , The presented work is funded within BIONICO. This project has received funding from the Fuel Cells_x000D_ and Hydrogen 2 Joint Undertaking under grant agreement No 671459. This Joint Undertaking receives support_x000D_ from the European Union’s Horizon 2020 Research and Innovation Programme, Hydrogen Europe and N.ERGHY.
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Nooijer , N , Arratibel Plazaola , A , Meléndez Rey , J , Fernandez , E , Pacheco Tanaka , D , Sint Annaland , M & Gallucci , F 2019 , ' Long-Term Stability of Thin-Film Pd-Based Supported Membranes ' , Processes , vol. 7 , no. 2 , 106 , pp. 106 . https://doi.org/10.3390/pr7020106