Syngas upgrading in a membrane reactor with thin Pd-alloy supported membrane
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Author/sBrunetti, Adele; Caravella, Alessio; Fernandez, Ekain; Pacheco Tanaka, David A.; Gallucci, Fausto; [et al.]
Water gas shift
In the hydrogen production, the syngas streams produced by reformers and/or coal gasification plants contain a large amount of H2 and CO needing to be upgraded. To this purpose, reactors using Pd-based membranes have been largely studied as they allow separation and recovery of a pure hydrogen stream. However, the high cost of the Pd-membranes is one of the main limitations for technology scaling up. Therefore, many researchers are now pursuing the possibility to use supported membranes with Pd-alloy layers as thinner as possible. In this work, the upgrading of a syngas stream was experimentally investigated in a water gas shift membrane reactor operated in the high temperature range with an ultra-thin supported membrane (4 micron-thick). The membrane permeance was measured before and after catalyst packing and after reaction (in a total 2100 h of operation). Membrane reactor performance was evaluated as a function of operating conditions like temperature, pressure, gas hourly space ...