Abstract
The water gas shift process (WGS) was developed in the presence of a ruthenium catalyst (Ru 2 wt%/TiO2), identified in anatase form (2θ 25.31°, 37.67°, 47.95°) and having the textural characteristics 82 m2 g−1 and 0.37 cm3 g−1. Prior to the reaction operations, independent experiments with hydrogen-argon fluxes indicated permeation selectivity for hydrogen in the Pd–Ag membrane, which increased when the H2/Ar ratio and temperature were higher. The catalytic processing was performed in a membrane reactor (MR) at moderate temperatures (453–573 K) under atmospheric pressure. The operations were initially performed in a fixed bed reactor mode, without hydrogen permeation, and then improved due to membrane operation, when higher carbon monoxide conversions were obtained at all temperatures. At 573 K, with and without permeation, 90 and 75% of the carbon monoxide conversions were obtained. The higher conversions reached the maximum conversion predicted by the thermodynamic equilibrium. In the operations performed with permeation (MR), hydrogen recovery (75–96%) was 4–6 times higher than that obtained without permeation.
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The authors would like to thank Federal University of Pernambuco, PRH 28- ANP (National Petroleum Agency, Brazil), FINEP and CETENE by the financial support to this project.
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de Queiroz, G.A., de Menezes Barbosa, C.M.B., A. Pimentel, C. et al. Performance of the water gas shift process with a ruthenium catalyst for hydrogen production in a membrane reactor. Reac Kinet Mech Cat 123, 679–687 (2018). https://doi.org/10.1007/s11144-017-1313-9
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DOI: https://doi.org/10.1007/s11144-017-1313-9