| dc.creator | MIGUEL JESUS MELENDEZ ZARAGOZA | |
| dc.creator | JORGE LUIS DOMINGUEZ ARVIZU | |
| dc.creator | JESUS MANUEL SALINAS GUTIERREZ | |
| dc.creator | VIRGINIA HIDALINA COLLINS MARTINEZ | |
| dc.date | 2016 | |
| dc.date.accessioned | 2022-10-12T19:42:58Z | |
| dc.date.available | 2022-10-12T19:42:58Z | |
| dc.identifier | http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1745 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/4120338 | |
| dc.description | The redox performance of iron oxide magnetite
(Fe3O4) as an oxygen carrier was investigated for hydrogen (H2)
and/or syngas (H2+CO) production through a methane-steam
redox process using a thermodynamic analysis and process
simulation to find most favorable reactions conditions (MFRC).
The reaction system was divided in two reactors. In the first
reduction step the following reactions were targeted: ¼ CH4(g) +
Fe3O4 = 3FeO + ¼ CO2(g) + ½ H2O(g) and CH4(g) + Fe3O4 = 3FeO
+ 2H2(g) + CO(g), which both represent complete and partial
oxidation of methane by an oxygen carrier (Fe3O4). While several
other reactions were allowed to proceed such as the carbon
formation by methane decomposition as well as further iron
reduction to Fe. The CH4/Fe3O4 molar ratio was varied from 0.25-
1 in a temperature range from 300-900 °C. In the second oxidation
reactor the solid products from the first reactor were combined
with steam to regenerate the oxygen carrier by: 3FeO + H2O(g) =
Fe3O4 + H2(g) using a fixed feed of 5.5 mols of H2O in a
temperature range of 300-900 °C. Thermodynamic analysis by the
Gibbs free energy minimization technique and process simulation
were performed in Aspen Plus. Criteria used to find MFRC were:
carbon-free formation conditions, reduction and oxidation carrier
phases as FeO and Fe3O4, respectively, avoiding the formation of
metallic Fe (carbon formation promoter) and the minimum
possible operating temperatures for energy saving reasons.
Results indicate that in the reduction reactor the MFRC consist in
T = 650-700°C and CH4/Fe3O4 = 0.75-1, While for the regenerator
were: T = 520-600 °C. Details of the mass and heat balances are
also presented | |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.rights | http://creativecommons.org/about/cc0/ | |
| dc.subject | info:eu-repo/classification/Redox Process/Methane-Steam | |
| dc.subject | info:eu-repo/classification/cti/2 | |
| dc.subject | info:eu-repo/classification/cti/23 | |
| dc.subject | info:eu-repo/classification/cti/2307 | |
| dc.subject | info:eu-repo/classification/cti/221099 | |
| dc.title | Hydrogen Production by a Fe-based Oxygen Carrier and Methane-Steam Redox Process: Thermodynamic Analysis | |
| dc.type | info:eu-repo/semantics/conferenceProceedings | |
| dc.type | info:eu-repo/semantics/submittedVersion | |
