• Madeira, Lm
• Tosti, S.
• Mendes, D.
• Borgognoni, F.
• Mendes, A.
• Chibante, V.
• Zheng, Jm

Abstract

In this work it is described an experimental study regarding the performance of a Pd-Ag membrane reactor recently proposed and suitable for the production of ultra pure hydrogen A dense metallic permeator tube was assembled by an innovative annealing and diffusion welding technique from a commercial flat sheet membrane of Pd-Ag A "finger like' configuration of the self supported membrane has been designed and used as a packed bed membrane reactor (MR) for producing ultra pure hydrogen via water gas shift reaction (WGS) A CuO/ZnO/Al2O3 catalyst, from REB Research & Consulting was used for packing the WGS membrane reactor The performance of the reactor was evaluated in terms of CO conversion and H-2 recovery in a wide range of conditions temperature from 200 degrees C to 300 degrees C, feed pressure from 1 0 bar to 4 0 bar vacuum and sweep gas modes and with a simulated reformate feed (4 70% CO 34 78% H2O, 28 70% H-2 10 16% CO2 balanced in N-2) Also the effect of the reactants feed composition was investigated and discussed CO conversions remained in most conditions above the thermodynamic equilibrium based on feed conditions In particular it is worth mentioning that around 100% of CO conversion and almost complete H-2 recovery was achieved when operating the MR at 300 degrees C with a GSHV = 1200 L-N kg(cat)(-1)h(-1) P-feed = 4 bar P-perm = 3 bar and using 1000 mL(N) min(-1) of sweep gas

Topics

• impedance spectroscopy
• Hydrogen
• annealing