Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/184006
COMPARTIR / EXPORTAR:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Título

Extension and evaluation of a macroscopic model for syngas-fueled chemical looping combustion

AutorMei, Daofeng; Abad Secades, Alberto CSIC ORCID ; Zhao, Haibo; Yan, Shuiping; Wang, Baowen; Yuan, Qiaoxia
Palabras claveCO2 capture
Chemical looping combustion
Syngas
Macroscopic fluidized bed model
Cu-based oxygen carrier
Shrinking core model
Fecha de publicación6-oct-2018
EditorElsevier
CitaciónChemical Engineering and Processing 133: 106-116 (2018)
ResumenSyngas-fueled Chemical Looping Combustion (syngas-CLC) which can be integrated with ex-situ gasification of coal has advantages over the direct use of coal in CLC: (i) no requirement of carbon stripper, (ii) no interaction of oxygen carrier with coal ash, (iii) no loss of oxygen carrier with the draining stream of ash. Few works on simulation of syngas-CLC were performed, although experimental investigations were extensively carried out. In this work, a macroscopic fuel reactor model is extended to a lab-scale 500 Wth reactor. The model based on fluid dynamics, mass balance and reduction kinetics is solved with MATLAB® codes and validated against experiments. Influences of various operation parameters are evaluated to study the flexibility of this model. It is shown that the model can give satisfactory predictions for fuel reactor of a syngas-CLC system, independent on the operation conditions. Variations of syngas composition, temperature, solids circulation and oxygen carrier inventory show different effects on flue gas composition and combustion efficiency. After thorough simulation, a region for a combustion efficiency of ηC = 99.9% is proposed, with which the optimized conditions for the 500 Wth reactor are established. An oxygen carrier inventory as low as 50 kg/MWth can assure the complete syngas combustion.
A macroscopic model was extended to the simulation of the bubbling fluidized fuel reactor of a 500 Wth continuous syngas-CLC facility. Behaviors of emulsion phase, bubble phase and freeboard were focused for the formulation of the reactor model. Good agreements of experiments and modeling results were achieved. After thorough simulation under various operation conditions, the macroscopic model exhibits satisfactory flexibility to different reaction environments. Based on the modeling, optimized operation regions for almost full syngas combustion with the lowest oxygen carrier inventory was developed.
Descripción12 Figures, 4 Tables.-- © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Versión del editorhttp://dx.doi.org/10.1016/j.cep.2018.10.003
URIhttp://hdl.handle.net/10261/184006
DOI10.1016/j.cep.2018.10.003
ISSN0255-2701
Aparece en las colecciones: (ICB) Artículos




Ficheros en este ítem:
Fichero Descripción Tamaño Formato
2018_Mei_Chem Eng Proc.pdfArtículo principal2,83 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo

CORE Recommender

SCOPUSTM   
Citations

10
checked on 28-mar-2024

WEB OF SCIENCETM
Citations

9
checked on 22-feb-2024

Page view(s)

183
checked on 28-mar-2024

Download(s)

204
checked on 28-mar-2024

Google ScholarTM

Check

Altmetric

Altmetric


Este item está licenciado bajo una Licencia Creative Commons Creative Commons