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http://cimav.repositorioinstitucional.mx/jspui/handle/1004/1744| Thermodynamic Analysis and Process Simulation of Syngas Production from Methane using CoWO4 as Oxygen Carrier | |
| PEDRO ELOY GONZALEZ VARGAS MIGUEL JESUS MELENDEZ ZARAGOZA VIRGINIA HIDALINA COLLINS MARTINEZ | |
| Acceso Abierto | |
| Sin Derechos Reservados | |
| Syngas CoWO4 | |
| For the production of synthesis gas (syngas), the partial oxidation (POX) of methane is a reaction that is more efficient than the steam reforming process (SMR), currently the dominant technology in hydrogen production. To overcome one of the most important disadvantages of POX reaction, which deals with the use of pure oxygen, a metal oxide (CoWO4) is proposed as an oxygen carrier (POX-MeO). Using a thermodynamic analysis of an arrangement of two reactors, here is presented. In the first reactor POX-MeO reactions (4CH4 + CoWO4 = 8H2 + 4CO + Co + W; 2CH4 + CoWO4 = 4H2 + 2CO2 + Co + W) and the undesirable coal formation (CH4 = C + 2H2) are carried out, while in the second reactor solid products of the first reactor are combined with steam to gasify the previously deposited coal (C + H2O = H2 + CO; C + 2H2O = 2H2 + CO2) and simultaneously regenerate the metal oxide to produce syngas (Co + W + 4H2O = CoWO4 + 4H2). Then, the regenerated oxide is recycled back to the first reactor to make a continuous process. A simulation of this process in Aspen Plus was performed taking into account an initial flow rate of 4 kmol/hr of methane. Four sensitivity analyses were performed to determine optimal operating process conditions. The first one was aimed to determine the CoWO4/CH4 feed molar ratio to carry out the reduction of the oxygen carrier, which was 1.1:4. The second sensitivity analysis determined 800°C as the optimal operating temperature of the first reactor to produce the highest yield to syngas. The third sensitivity analysis was carried out in the second reactor studying the variation of the operating temperature at which regeneration of CoWO4 occurred, being 590°C. And finally, the fourth sensitivity analysis found the molar feed of steam to complete the regeneration of CoWO4. At this established conditions a 96% of methane conversion was found and the production of one gas stream of syngas and another with 100% hydrogen purity. | |
| 2016 | |
| Memoria de congreso | |
| Inglés | |
| OTRAS | |
| Versión revisada | |
| submittedVersion - Versión revisada | |
| Aparece en las colecciones: | Artículos de Congresos |
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| Thermodynamic Analysis and Process Simulation of Syngas.pdf | 741.73 kB | Adobe PDF | Visualizar/Abrir |