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Thermodynamic evaluation of hydrogen production for fuel cells by using bio-ethanol steam reforming: Effect of carrier gas addition

Abstract

Omitting the influence of the addition of carrier gas to the reaction system for hydrogen production by bio-ethanol steam reforming can lead to wrong conclusions, especially when it is going to be made to scale. The effect of carrier gas addition to produce hydrogen using bio-ethanol steam reforming to feed fuel cells was evaluated. Thermodynamic calculations in equilibrium conditions were made, however the analysis derived from them can also be applied to kinetic conditions. These calculations were made by using the Aspen-HYSYS software at atmospheric pressure and different values of temperature, water/ethanol molar ratios, and inert (argon)/(water/ethanol) molar ratios. The addition of inert carrier gas modifies the concentrations of the reaction products in comparison to those obtained without its presence. This behavior occurs because most of the reactions which take place in bio-ethanol steam reforming have a positive difference of moles. This fact enhances the system sensitivity to inert concentration at low and moderated temperatures (<700 C). At high values of temperature, the inert addition does not influence the composition of the reaction products because of the predominant effect of inverse WGS reaction. (author)
Authors:
Hernandez, Liliana; Kafarov, Viatcheslav [1] 
  1. Universidad Industrial de Santander, Escuela de Ingenieria Quimica, Bucaramanga 678 (Colombia)
Publication Date:
Jul 01, 2009
Product Type:
Journal Article
Resource Relation:
Journal Name: Journal of Power Sources; Journal Volume: 192; Journal Issue: 1; Conference: 3. National congress on fuel cells - CONAPPICE 2008, Zaragoza (Spain), 24-26 Sep 2008; Other Information: Elsevier Ltd. All rights reserved
Subject:
30 DIRECT ENERGY CONVERSION; THERMODYNAMICS; HYDROGEN PRODUCTION; HYDROGEN; PRODUCTION; FUEL CELLS; ETHANOL; STEAM; EQUILIBRIUM; KINETICS; ATMOSPHERIC PRESSURE; WATER; ARGON; SENSITIVITY; STEAM REFORMER PROCESSES; Hydrogen production; Bio-ethanol steam reforming; Inert gas addition effect; Fuel cells; Chemical equilibrium
OSTI ID:
21186648
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0378-7753; JPSODZ; TRN: NL09V4158
Availability:
Available from: http://dx.doi.org/10.1016/j.jpowsour.2009.02.012
Submitting Site:
ECN
Size:
page(s) 195-199
Announcement Date:
Jun 30, 2009

Citation Formats

Hernandez, Liliana, and Kafarov, Viatcheslav. Thermodynamic evaluation of hydrogen production for fuel cells by using bio-ethanol steam reforming: Effect of carrier gas addition. Netherlands: N. p., 2009. Web. doi:10.1016/J.JPOWSOUR.2009.02.012.
Hernandez, Liliana, & Kafarov, Viatcheslav. Thermodynamic evaluation of hydrogen production for fuel cells by using bio-ethanol steam reforming: Effect of carrier gas addition. Netherlands. doi:10.1016/J.JPOWSOUR.2009.02.012.
Hernandez, Liliana, and Kafarov, Viatcheslav. 2009. "Thermodynamic evaluation of hydrogen production for fuel cells by using bio-ethanol steam reforming: Effect of carrier gas addition." Netherlands. doi:10.1016/J.JPOWSOUR.2009.02.012. https://www.osti.gov/servlets/purl/10.1016/J.JPOWSOUR.2009.02.012.
@misc{etde_21186648,
title = {Thermodynamic evaluation of hydrogen production for fuel cells by using bio-ethanol steam reforming: Effect of carrier gas addition}
author = {Hernandez, Liliana, and Kafarov, Viatcheslav}
abstractNote = {Omitting the influence of the addition of carrier gas to the reaction system for hydrogen production by bio-ethanol steam reforming can lead to wrong conclusions, especially when it is going to be made to scale. The effect of carrier gas addition to produce hydrogen using bio-ethanol steam reforming to feed fuel cells was evaluated. Thermodynamic calculations in equilibrium conditions were made, however the analysis derived from them can also be applied to kinetic conditions. These calculations were made by using the Aspen-HYSYS software at atmospheric pressure and different values of temperature, water/ethanol molar ratios, and inert (argon)/(water/ethanol) molar ratios. The addition of inert carrier gas modifies the concentrations of the reaction products in comparison to those obtained without its presence. This behavior occurs because most of the reactions which take place in bio-ethanol steam reforming have a positive difference of moles. This fact enhances the system sensitivity to inert concentration at low and moderated temperatures (<700 C). At high values of temperature, the inert addition does not influence the composition of the reaction products because of the predominant effect of inverse WGS reaction. (author)}
doi = {10.1016/J.JPOWSOUR.2009.02.012}
journal = {Journal of Power Sources}
issue = {1}
volume = {192}
place = {Netherlands}
year = {2009}
month = {Jul}
}