Journal
AICHE JOURNAL
Volume 62, Issue 11, Pages 3899-3914Publisher
WILEY-BLACKWELL
DOI: 10.1002/aic.15289
Keywords
CO2 capture; solid sorbent; moving bed; dynamic model; regenerator; model predictive control
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Funding
- U.S. Department of Energy, Office of Fossil Energy as part of the Carbon Capture Simulation Initiative (CCSI)
- RES [DE-FE0004000]
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A mathematical model for a moving bed reactor with embedded heat exchanger has been developed for application to solid sorbent-based capture of carbon dioxide from flue gas emitted by coal-fired power plants. The reactor model is one-dimensional, non-isothermal, and pressure-driven. The two-phase (gas and solids) model includes rigorous kinetics and heat and mass transfer between the two phases. Flow characteristics of the gas and solids in the moving bed are obtained by analogy with correlations for fixed and fluidized bed systems. From the steady-state perspective, this work presents the impact of key design variables that can be used for optimization. From the dynamic perspective, the article shows transient profiles of key outputs that should be taken into account while designing an effective control system. In addition, the article also presents performance of a model predictive controller for the moving bed regenerator under process constraints. (c) 2016 American Institute of Chemical Engineers AIChE J, 62: 3899-3914, 2016
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