Syngas upgrading in a membrane reactor with thin Pd-alloy supported membrane
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2015-09-14
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Abstract
In hydrogen production, the syngas streams produced by reformers and/or coal gasification plants contain a large amount of H2 and CO in need of upgrading. To this purpose, reactors using Pd-based membranes have been widely studied as they allow separation and recovery of a pure hydrogen stream. However, the high cost of Pd-membranes is one of the main limitations for scaling up technology. Therefore, many researchers are now pursuing the possibility of using supported membranes with as thin as possible Pd-alloy layers. In this work, the upgrading of a syngas stream is experimentally investigated in a water gas shift membrane reactor operated in a high temperature range with an ultra-thin supported membrane (3.6 micron-thick). The membrane permeance was measured before and after catalyst packing and also after reaction for 2100 h of operation in total. Membrane reactor performance was evaluated as a function of operating conditions such as temperature, pressure, gas hourly space velocity, feed molar ratio, and sweep gas. A CO conversion significantly higher than the thermodynamics upper limit of a traditional reactor was achieved, even at high gas hourly space velocities and a 25% less reaction volume than that of a traditional reactor was enough to achieve a 90% equilibrium conversion.
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Publisher Copyright: © 2015 Hydrogen Energy Publications, LLC.
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Hydrogen production , Membrane reactor , Pd-based membrane , Water gas shift , Membrane reactor , Hydrogen production , Water gas shift , Pd-based membrane , Renewable Energy, Sustainability and the Environment , Fuel Technology , Condensed Matter Physics , Energy Engineering and Power Technology , SDG 7 - Affordable and Clean Energy , Project ID , info:eu-repo/grantAgreement/EC/FP7/262840/EU/Design and Manufacturing of Catalytic Membrane Reactors by developing new nano-architectured catalytic and selective membrane materials/DEMCAMER , info:eu-repo/grantAgreement/EC/FP7/262840/EU/Design and Manufacturing of Catalytic Membrane Reactors by developing new nano-architectured catalytic and selective membrane materials/DEMCAMER
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Brunetti , A , Caravella , A , Fernandez , E , Pacheco Tanaka , D A , Gallucci , F , Drioli , E , Curcio , E , Viviente , J L & Barbieri , G 2015 , ' Syngas upgrading in a membrane reactor with thin Pd-alloy supported membrane ' , International Journal of Hydrogen Energy , vol. 40 , no. 34 , pp. 10883-10893 . https://doi.org/10.1016/j.ijhydene.2015.07.002