About this Engineering article

Stability of electroless pore-plated Pd-membranes in acetic acid steam membrane-reformers for ultra-pure hydrogen production by Adduci, G.; Martinez-Diaz, D.; Sanz-Villanueva, D.; Caravella, A.; Calles, J.A.; Sanz, R.; Alique, D. is a Engineering article available to read on EtoBox.

Electroless Pore-Plated (ELP-PP) membranes were successfully incorporated for the first time into a membrane reactor to produce hydrogen by acetic acid steam reforming (AASR), exhibiting adequate resistance against harsh operating conditions. Membranes were prepared onto tubular PSS supports modified with Pd/CeO 2 particles and scaled-up around four times in length with high reproducibility respect previous studies. H 2 permeances from 4.49 to 5.67•10 -4 mol m -2 s -1 Pa -0.5 were found for pure H 2 at 350-450 °C, decreasing for mixtures due to concentration-polarization at higher pressures but also certain inhibition caused by CO 2 at pressures below 50 Pa 0.5 . The combination of membranes with Ni/SBA-15 catalysts in packed-bed membrane reactors (PBMR) evidenced the simultaneous improvement of acetic acid conversion and hydrogen yield respect to analogous experiments in traditional packed-bed reactors (PBR). A very similar product distribution was obtained for both configurations, PBR and PBMR, when using fresh catalysts, although marked deviations were found in case of regenerating the catalysts. Then, higher selectivity towards coke reached for PBMR, which lead to around 30% fo

Author

Adduci, G.; Martinez-Diaz, D.; Sanz-Villanueva, D.; Caravella, A.; Calles, J.A.; Sanz, R.; Alique, D.

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0378-3820)

Published

2021

Language

EN

Field

Engineering (Physical Sciences)