In H2 production, the reformer downstream upgrading is a fundamental step for CO (ca. 10%) reduction. H2 (ca. 50%) presence limits CO conversion (ca. 25%) significantly (by thermodynamics) in a traditional reactor (TR). A Pd-Ag membrane (60 micron thick) removing H2 from the reaction side shifted the water-gas shift reaction toward a further product formation, and a very high (ca. 90%) CO conversion was measured, significantly exceeding the TR equilibrium value. In the meantime, a pure H2 stream, suitable for a proton exchange membrane fuel cell (PEMFC), is recovered on the permeate side because no sweep gas is used. The H2 permeation was driven by feed pressure.
Pd-based membrane reactor for syngas upgrading
Brunetti A;Barbieri G;Drioli E
2009
Abstract
In H2 production, the reformer downstream upgrading is a fundamental step for CO (ca. 10%) reduction. H2 (ca. 50%) presence limits CO conversion (ca. 25%) significantly (by thermodynamics) in a traditional reactor (TR). A Pd-Ag membrane (60 micron thick) removing H2 from the reaction side shifted the water-gas shift reaction toward a further product formation, and a very high (ca. 90%) CO conversion was measured, significantly exceeding the TR equilibrium value. In the meantime, a pure H2 stream, suitable for a proton exchange membrane fuel cell (PEMFC), is recovered on the permeate side because no sweep gas is used. The H2 permeation was driven by feed pressure.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
