A circulating fluidized bed steam generator 10 and a method for operating the circulating fluidized bed steam generator are provided which offer the flexibility to use carbon dioxide both as a desirable end product and as {HEAD ~ support} to {TAIL ~ the combustion process} 
to
A circulating fluidized bed steam generator 10 and a method for operating the circulating fluidized bed steam generator are provided which offer the flexibility to use carbon dioxide both as a desirable end product and as { HEAD ~ support } to { TAIL ~ the combustion process }
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