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 Characterization of Fe2O3/Mn2O3 Oxygen Carrier for Chemical Looping Combustion Prepared by Dry Impregnation Method

2018 ◽  
Vol 7 (4.35) ◽  
pp. 674 ◽  
Author(s):  
Nurfanizan Mohd Afandi ◽  
Abreeza Noorlina Abd Manap ◽  
Fitri Hanif Mansor ◽  
Mohammad Firdaus Abdul Ghani ◽  
NF Kadir ◽  
...  
Keyword(s):  
Particle Size ◽  
Crystallite Size ◽  
Fluidized Bed ◽  
Low Cost ◽  
Oxygen Carrier ◽  
Fluidized Bed Reactor ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Impregnation Method

Recently, bauxite waste was found as newly sourced of Fe-based oxygen carrier in chemical looping combustion (CLC) since it contains high Fe and capable to be used as oxygen carrier at low cost. This study focuses on synthesizing and characterizing the bauxite waste that found in Malaysia with Mn2O3 using dry impregnation method and study the feasibility of this bauxite waste as oxygen carrier. Results show the combination of bauxite waste – Mn2O3 at 900°C produces crystallite size 21 nm with the presence of Fe-Mn, stable Al2O3 and Ti elements that can improve the reactivity of Fe-Mn oxygen carrier. Moreover, Al2O3 that contains naturally in bauxite waste can acts as supported material for Fe-Mn oxygen carrier in order to increase performance in CLC process. Therefore, this powder was successfully synthesized using dry impregnation method at calcination temperature 900°C and fit to be tested in a fluidized bed reactor to simulate the CLC process since it has smaller and stable particle size.

Continuous Operation of Interconnected Fluidized Bed Reactor for Chemical Looping Combustion of CH4 Using Hematite as Oxygen Carrier

2015 ◽  
Vol 29 (5) ◽  
pp. 3257-3267 ◽  
Author(s):  
Jinchen Ma ◽  
Haibo Zhao ◽  
Xin Tian ◽  
Yijie Wei ◽  
Yongliang Zhang ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Oxygen Carrier ◽  
Fluidized Bed Reactor ◽  
Continuous Operation ◽  
Chemical Looping Combustion ◽  
Chemical Looping

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.

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