Transient modeling of biomass steam gasification with Co3O4

Aghabararnejad, Milad; Patience, Gregory S.; Chaouki, Jamal

doi:10.1016/j.fuel.2014.09.071

Cited by 8 publications

(4 citation statements)

References 35 publications

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“…Materials characterization data for Co 3 O 4 systems further support the release of lattice oxygen following a nucleation and nuclei growth [27] rather than a core-shell model. As with CoO, concurrent XPS analysis suggests that the reactive substrate surface evolves in a manner distinct from the particle bulk.…”

Section: Characterization Of Co 3 O 4 Surface and Bulk Composition Dumentioning

confidence: 87%

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

Alalwan

Cwiertny

Grassian

2017

Chemical Engineering Journal

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Section: Characterization Of Co 3 O 4 Surface and Bulk Composition Dumentioning

confidence: 87%

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

Alalwan

Cwiertny

Grassian

2017

Chemical Engineering Journal

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“…The solid mixing induces the gas in the fluidized bed zone to mix. [4,[31][32][33] Therefore, the reactor can be reasonably modelled as follows: a continuous stirred-tank model for the fluidized bed zone and a plug-flow model for the freeboard region. [4,[31][32][33][34][35]…”

Section: Modelling Of the Fluidized Bed Tga Reactormentioning

confidence: 99%

“…The experiments in the fluidized bed TGA were carried out at approximately the minimum fluidization regime. The solid mixing induces the gas in the fluidized bed zone to mix . Therefore, the reactor can be reasonably modelled as follows: a continuous stirred‐tank model for the fluidized bed zone and a plug‐flow model for the freeboard region …”

Section: Modelling Of the Fluidized Bed Tga Reactormentioning

confidence: 99%

Coal pyrolysis and gasification in a fluidized bed thermogravimetric analyzer

Samih

Chaouki

2018

Can J Chem Eng

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The kinetics and modelling of coal gasification were studied in the newly developed fluidized bed thermogravimetric analyzer. The total weight loss obtained from the fluidized bed reactor and the total gas product are in general agreement. The presented model for the micro‐fluidized bed reactor encompasses the kinetics of coal pyrolysis as well as the gasification reactions. For coal pyrolysis, the resulting activation energies for the individual gases were 34.7 to 59.8 kcal/mol. These values are 19 to 21 % lower than those found in the literature for similar coals. This decrease of the activation energies of the endothermic pyrolysis reactions is attributed to a gradient of temperature of 185 to 209 °C. The obtained activation energy for the CO shift reaction is 46.6 kcal/mol, increasing by 20 % from the one used in the literature. This increase of the activation energy of such a mildly exothermic reaction represents an equivalent of 170 °C gradient of temperature. The effects of temperature on the yield and the composition of the gas product are studied. Experimental results and equilibrium data are also compared. The model shows reasonably good agreement with the experimental results, except for the water gas shift reaction.

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“…They concluded that cobalt with 7 % of oxygen transport capacity has superior properties and can serve as an excellent oxygen carrier especially for solid fuel conversion. They showed by further experiments in a 7.8-cm ID fluidized-bed gasifier that the cobalt oxide performance was not affected by the presence of biomass [16].…”

Section: Introductionmentioning

confidence: 98%

Techno‐Economic Comparison of a 7‐MW_th Biomass Chemical Looping Gasification Unit with Conventional Systems

2015

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The chemical looping process is an alternative method to provide conventional gasification (CG) systems with the required oxygen. The syngas produced via chemical looping has a higher calorific value than that generated by a conventional process with air. For comparison, a conventional gasification unit with pure oxygen (CGPO) and a chemical looping gasification (CLG) system were simulated with Aspen Plus. The CGPO reactor consisted of a bubbling fluidized bed and sand as bed material with oxygen supplied via a pressure swing adsorption unit. The CLG comprised a bubbling fluidized-bed gasifier working in parallel with a fast fluidized-bed oxidizer. The total capital investment (TCI) of the CLG unit was higher than that of the CGPO unit but the annual operating cost of the former was less which repays the difference in TCI in less than six years.

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Transient modeling of biomass steam gasification with Co3O4

Cited by 8 publications

References 35 publications

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

Coal pyrolysis and gasification in a fluidized bed thermogravimetric analyzer

Techno‐Economic Comparison of a 7‐MW_th Biomass Chemical Looping Gasification Unit with Conventional Systems

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Transient modeling of biomass steam gasification with Co3O4

Cited by 8 publications

References 35 publications

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

Co3O4 nanoparticles as oxygen carriers for chemical looping combustion: A materials characterization approach to understanding oxygen carrier performance

Coal pyrolysis and gasification in a fluidized bed thermogravimetric analyzer

Techno‐Economic Comparison of a 7‐MWth Biomass Chemical Looping Gasification Unit with Conventional Systems

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Techno‐Economic Comparison of a 7‐MW_th Biomass Chemical Looping Gasification Unit with Conventional Systems