English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/110333
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Chemical looping combustion process in fixed-bed reactors using ilmenite as oxygen carrier: Conceptual design and operation strategy

AutorFernández García, José Ramón ; Alarcón Rodríguez, Juana María
Palabras claveCO2 capture
Chemical looping combustion
Adiabatic fixed-bed
Heat management
Fecha de publicacióndic-2014
CitaciónChemical Engineering Journal 264: 797-806 (2015)
ResumenA process scheme based on fixed-bed reactors is presented as a possible alternative for carrying out the chemical looping combustion of methane at high pressure with ilmenite as oxygen carrier. The operation at high pressure permits the use of highly efficient power cycles. However, complex heat management strategies and switching valves able to function at very high temperatures are required. The continuous cyclic operation of a packed-bed chemical looping combustion process is described using a basic reactor model. A sequence of four stages: reduction, steam reforming, oxidation and heat removal ensures the production of a continuous high temperature and high pressure gas able to efficiently drive a gas turbine for power generation in combination with a steam cycle. At the same time, a concentrated stream of CO2 suitable for transport and storage is also produced. The use of suitable recycles of product gases makes it possible to control the progression of the reaction and the heat exchange fronts, which improves the heat management of the CLC process. The inclusion of steam methane reforming in the process allows the conversion of the ingoing methane to syngas, which enhances the reduction kinetics of the ilmenite and the overall combustion efficiency of the process. A preliminary conceptual design for an inlet flow of 10 kg/s of methane (500 MWt) has shown that a minimum of five reactors, 10 m long, with an inner diameter of 6.7 m, would be required to fulfil the overall process assuming cycles of 10 min with maximum pressure drops per stage of less than 6%. These results demonstrate the potential of this novel technology for power generation in combination with CO2 capture.
Versión del editorhttp://dx.doi.org/10.1016/j.cej.2014.12.022
Aparece en las colecciones: (INCAR) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Chemical_looping_Fernandez.pdf320,56 kBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.