A framework for the optimization of chemical looping combustion processes

Chemical looping combustion is a transformative electricity generation process with the potential for high efficiency and a unique approach to carbon capture capable of achieving very low energy penalties. Chemical looping combustion systems based on moving bed and bubbling fluidized bed reactors ha...

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Bibliographic Details
Published in:Powder technology 2020-04, Vol.365 (C), p.149-162
Main Authors: Okoli, Chinedu O., Ostace, Anca, Nadgouda, Sourabh, Lee, Andrew, Tong, Andrew, Burgard, Anthony P., Bhattacharyya, Debangsu, Miller, David C.
Format: Article
Language:English
Subjects:
Bubbling
Bubbling fluidized bed reactor model
Carbon sequestration
Chemical looping combustion
Combustion
Computational fluid dynamics
Electricity
Electricity consumption
Fluid flow
Fluidized bed combustion
Fluidized bed reactors
Fluidized beds
Heat transfer
Hydrodynamics
Mathematical modeling
Methane
Moving bed reactor model
Moving beds
Optimization
Optimization framework
Reaction kinetics
Reactors
Systems engineering
Total annualized cost
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Summary:Chemical looping combustion is a transformative electricity generation process with the potential for high efficiency and a unique approach to carbon capture capable of achieving very low energy penalties. Chemical looping combustion systems based on moving bed and bubbling fluidized bed reactors have been proposed. This paper employs rigorous models utilizing the Institute for the Design of Advanced Energy Systems (IDAES) process systems engineering (PSE) framework, to optimize iron-based, methane-fueled chemical looping combustion processes based on both reactor concepts. The models account for reaction kinetics, mass and heat transfer, and hydrodynamics. Each system was optimized to minimize total annualized costs while combusting 99.9% of the methane feed of 125 mol/s. Within the assumptions of this study, the moving bed-based chemical looping combustion process has significant cost advantages compared to the bubbling fluidized bed-based chemical looping combustion process due to smaller reactor sizes and solids inventory, and lower electricity consumption. [Display omitted] •A framework for mathematical optimization of chemical looping systems is presented•The framework is developed to use detailed first-principles chemical looping models•Case studies for moving bed and bubbling fluidized bed CLC reactors are presented•Optimization results demonstrate the benefits of this framework
ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2019.04.035