Design, process simulation and construction of an atmospheric dual fluidized bed combustion system for in situ CO2 capture using high-temperature sorbents

• Published in: Fuel processing technology Vol. 86; no. 14-15; pp. 1523 - 1531
• Main Authors: HUGHES, Robin W, LU, Dennis Y, ANTHONY, Edward J, MACCHI, Arturo
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Amsterdam Elsevier Science 01.10.2005
• Subjects: Air pollution caused by fuel industries; Applied sciences; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Pollution reduction; Pilot plant; Carbon dioxide capture; Air pollution control; Fluidized bed combustion; In situ; Limestone; CO2 sequestration; Biomass; High temperature; Petroleum coke; Coal; Carbonation; Sorbent; Atmospheric fluidised bed combustion
• ISSN: 0378-3820; 1873-7188
• DOI: 10.1016/j.fuproc.2005.01.006

An atmospheric dual fluidized bed combustion system using high-temperature sorbents for in situ CO2 capture has been designed and simulated and is now under construction. The pilot plant is expected to burn petroleum coke and coal or biomass in a clean and efficient manner, generating a carbonator flue gas containing 2-5 mol% CO2, while producing a relatively pure carbon dioxide stream ready for compression. The concentration of sulphur dioxide in the resulting flue gas is expected to be on the order of a few parts per million by volume. Initial investigations are to be carried out using limestone-derived sorbents enhanced using a simple single step process for pore modification developed at CETC-Ottawa. Carbonation occurs in a two-stage fluidized bed carbonatorcombustor allowing for optimal temperature control for both combustion (850-950 DeltaDGC) and carbonation (650-750 DeltaDGC). Calcination occurs in a single-stage fluidized bed combustor burning petroleum coke. Pilot plant operational data will be used for on-going scale-up activities using the ASPEN Plus process simulator.