Water-gas shift (WGS) represents an important industrial reaction conventionally performed in fixed bed reactors (FBRs) in the field of reforming processes to remove or, at least, to reduce the CO concentration of a reformed stream. As an alternative technology to the conventional systems, palladium-based membrane reactor (MR) technology could play an important role in the viewpoint of high purity hydrogen production. Indeed, this technology allows the thermodynamic constrains of WGS reaction performed in FBRs to be overcome, owing to the selective permeation of hydrogen through the membrane. Composite membranes, constituted by Pd-layer supported onto porous stainless steel (PSS), could be useful for the purpose. The aim of this work is to analyze the potentiality of a supported PSS palladium MR for high purity H2 production via WGS reaction. At 390 °C and 0.8 bar of pressure difference across the membrane, the permeation tests on the Pd-based membrane shows an ideal permeation selectivity H2/N2 around 300. The reaction tests are performed at the same temperature in a reaction pressure range between 7 - 11 bar, keeping constant the permeate pressure at 1.0 bar. As a best result of this work, a CO conversion of 80%, a hydrogen recovery of 60% with a hydrogen purity of around 95% is achieved operating at H2O:CO = 1:1, p = 11 bar and gas hourly space velocity = 5750 h-1.
|Publication status||Published - 2011|
|Event||4th European Fuel Cell Piero Lunghi Conference and Exhibition, EFC 2011 - Rome, Italy|
Duration: 1 Jan 2011 → …
|Conference||4th European Fuel Cell Piero Lunghi Conference and Exhibition, EFC 2011|
|Period||1/1/11 → …|
All Science Journal Classification (ASJC) codes
- Fuel Technology
Iulianelli, A., Pinacci, P., Calabrò, V., Liguori, S., Drago, F., Tosti, S., ... Basile, A. (2011). Water gas shift reaction in a PSS supported palladium membrane reactor. Paper presented at 4th European Fuel Cell Piero Lunghi Conference and Exhibition, EFC 2011, Rome, Italy.