Flash Calcination of Limestone in a bench-scale Sorbent Activation Process (SAP) UnitFlash Calcination of Limestone in a bench-scale Sorbent Activation Process (SAP) Unit

This 2012 research at the University of Illinois with funding from EPRI  addresses producing quicklime by a novel process to remove SOx and HCl from flue gas streams. Quicklime is commercially prepared by thermal decomposition of limestone (CaCO3) in a rotary kiln. The surface area of commercial quicklime, a key parameter of reactivity, is typically < 2 m2 /g. Therefore, increasing the surface area of quicklime in a cost-effective process would enhance its effectiveness as a sorbent for control of combustion-generated air pollutants.

This process is an extension of a similar patented process for on-site production of activated carbon (AC) to remove vapor-phase mercury emissions in the flue gas (US Patents 6, 451, 094 and 6,558,454). SAP utilizes an entrained-flow reactor in which sorbent (AC or quicklime) particles are subjected to a < 5 second residence time during their production. On-site production of quicklime could help lower the production cost of quicklime sorbent for dry sorbent injection (DSI) applications.

https://core.ac.uk/download/pdf/4838709.pdf