Co–Ni/Al2O3 oxygen carrier for fluidized bed chemical-looping combustion: Desorption kinetics and metal–support interaction

2007 ◽  
Vol 62 (18-20) ◽  
pp. 5464-5472 ◽  
Author(s):  
M.M. Hossain ◽  
K.E. Sedor ◽  
H.I. de Lasa
Keyword(s):  
Fluidized Bed ◽  
Oxygen Carrier ◽  
Chemical Looping Combustion ◽  
Desorption Kinetics ◽  
Chemical Looping ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support

scholarly journals Modeling of the Chemical Looping Combustion of Hard Coal and Biomass Using Ilmenite as the Oxygen Carrier

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5394
Author(s):  
Anna Zylka ◽  
Jaroslaw Krzywanski ◽  
Tomasz Czakiert ◽  
Kamil Idziak ◽  
Marcin Sosnowski ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Oxygen Carrier ◽  
Experimental Tests ◽  
Chemical Looping Combustion ◽  
Hard Coal ◽  
Chemical Looping ◽  
Simulation Accuracy ◽  
Energy Technologies ◽  
Fuel Reactor ◽  
Relative Errors

This paper presents a 1.5D model of a fluidized bed chemical looping combustion (CLC) built with the use of a comprehensive simulator of fluidized and moving bed equipment (CeSFaMB) simulator. The model is capable of calculating the effect of gas velocity in the fuel reactor on the hydrodynamics of the fluidized bed and the kinetics of the CLC process. Mass of solids in re actors, solid circulating rates, particle residence time, and the number of particle cycles in the air and fuel reactor are considered within the study. Moreover, the presented model calculates essential emissions such as CO2, SOX, NOX, and O2. The model was successfully validated on experimental tests that were carried out on the Fluidized-Bed Chemical-Looping-Combustion of Solid-Fuels unit located at the Institute of Advanced Energy Technologies, Czestochowa University of Technology, Poland. The model’s validation showed that the maximum relative errors between simulations and experiment results do not exceed 10%. The CeSFaMB model is an optimum compromise among simulation accuracy, computational resources, and processing time.

scholarly journals Use of ilmenite as an oxygen carrier in chemical looping combustion-batch and continuous dual fluidized bed investigation

2011 ◽  
Vol 4 ◽  
pp. 433-440 ◽  
Author(s):  
A.R. Bidwe ◽  
F. Mayer ◽  
C. Hawthorne ◽  
A. Charitos ◽  
A. Schuster ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Oxygen Carrier ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Dual Fluidized Bed

Chemical looping combustion of coal in a 5 kWth interconnected fluidized bed reactor using hematite as oxygen carrier

2015 ◽  
Vol 157 ◽  
pp. 304-313 ◽  
Author(s):  
Jinchen Ma ◽  
Haibo Zhao ◽  
Xin Tian ◽  
Yijie Wei ◽  
Sharmen Rajendran ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Oxygen Carrier ◽  
Fluidized Bed Reactor ◽  
Chemical Looping Combustion ◽  
Chemical Looping

scholarly journals Transient Cold Flow Simulation of Fast-Fluidized Bed Air Reactor with Hematite as an Oxygen Carrier for Chemical Looping Combustion

2021 ◽  
Vol 11 (5) ◽  
pp. 2288
Author(s):  
Pulkit Kumar ◽  
Ajit K. Parwani ◽  
Dileep Kumar Gupta ◽  
Vivek Vitankar
Keyword(s):  
Fluidized Bed ◽  
Carbon Capture ◽  
Oxygen Carrier ◽  
Stable Solution ◽  
Flow Simulation ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Discrete Phase Model ◽  
Particle Injection ◽  
Cold Flow

Chemical looping combustion (CLC) is the most reliable carbon capture technology for curtailing CO2 insertion into the atmosphere. This paper presents the cold flow simulation results necessary to understand the hydrodynamic viability of the fast-fluidized bed air reactor. Hematite is selected as an oxygen carrier due to its easy availability and active nature during the reactions. The dense discrete phase model (DDPM) approach using the commercial software Ansys Fluent is applied in the simulation. An accurate and stable solution is achieved using the second-order upwind numerical scheme. A pressure difference of 150 kPa is obtained between the outlet and inlet of the selected air reactor, which is necessary for the movement of the particle. The stable circulating rate of hematite is achieved after 28 s of particle injection inside the air reactor. The results have been validated from the experimental results taken from the literature.

scholarly journals Advancements in Development of Chemical-Looping Combustion: A Review

2009 ◽  
Vol 2009 ◽  
pp. 1-16 ◽  
Author(s):  
He Fang ◽  
Li Haibin ◽  
Zhao Zengli
Keyword(s):  
Fluidized Bed ◽  
Large Scale ◽  
Oxygen Carrier ◽  
Reactor Design ◽  
Design System ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
Design Development ◽  
Conversion Rates

Chemical-looping combustion (CLC) is a novel combustion technology with inherent separation of greenhouseCO2. Extensive research has been performed on CLC in the last decade with respect to oxygen carrier development, reaction kinetics, reactor design, system efficiencies, and prototype testing. Transition metal oxides, such as Ni, Fe, Cu, and Mn oxides, were reported as reactive species in the oxygen carrier particles. Ni-based oxygen carriers exhibited the best reactivity and stability during multiredox cycles. The performance of the oxygen carriers can be improved by changing preparation method or by making mixedoxides. The CLC has been demonstrated successfully in continuously operated prototype reactors based on interconnected fluidized-bed system in the size range of 0.3–50 kW. High fuel conversion rates and almost 100%  CO2capture efficiencies were obtained. The CLC system with two interconnected fluidized-bed reactors was considered the most suitable reactor design. Development of oxygen carriers with excellent reactivity and stability is still one of the challenges for CLC in the near future. Experiences of building and operating the large-scale CLC systems are needed before this technology is used commercially. Chemical-looping reforming (CLR) and chemical-looping hydrogen (CLH) are novel chemical-looping techniques to produce synthesis gas and hydrogen deserving more attention and research.

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