Hydrogen production from methane steam reforming: parametric and gradient based optimization of a Pd-based membrane reactor |
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Authors: | Leandro C Silva Valéria V Murata Carla E Hori Adilson J Assis |
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Affiliation: | (1) Institute on Membrane Technology of National Research Council (ITM-CNR), Via P. Bucci Cubo 17/C c/o University of Calabria, 87036 Rende, CS, Italy;(2) Faculty of Engineering, University Campus Bio-Medico of Rome, via Alvaro del Portillo 21, 00128 Rome, Italy |
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Abstract: | In this work three mathematical models for methane steam reforming in membrane reactors were developed. The first one is a
steady state, non isothermal, non isobaric and one dimensional model derived from material and energy balances and validated
using experimental data from the literature. It is referred as full model. The influence of two different intrinsic kinetics
available, as well as, the influence of five important parameters on methane conversion (XCH4_{\mathrm{CH}_{4}}) and hydrogen recovery (YH2_{\mathrm{H}_{2}}) were parametrically evaluated through simulations. The second model, referred as meta-model, was obtained though the response
surface technique. This meta-model was included into a constrained optimization problem solved using NPSOL. The third model,
referred as a simplified model, takes into account only mass balances from the full model. Using this model, a gradient based
method (DIRCOL) was used to perform the optimization of the sum of methane conversion and hydrogen recovery. High methane
conversions and hydrogen recoveries were reached through these methodologies. |
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