Evaluation of sorbents for capturing SO2 in fluidized-bed combustion systems

David E. Romans, Alan W. Scaroni, Bruce G. Miller

Research output: Contribution to conferencePaperpeer-review


Chemical composition, porosity, surface area, pore size distribution and particle size are the parameters which most affect the performance of Ca-based sorbents for in situ removal of SO2 from the gaseous product from coal combustion in fluidized beds. There is reason to believe that an optimum range of CaCO3 content exists since overall stone performance is determined by a balance between the calcium supplied and the calcium used. Porosity and pore size distribution are extremely important physical parameters for large particles (100-1,000 μm), whereas surface area is more crucial for small particles. The effect of particle size is pronounced, although in an operating fluidized-bed combustor (FBC) the minimum particle size is limited by the resulting residence time. That is, residence times of 2-3 seconds may not be sufficient to justify feeding a large amount of fines in an attempt to minimize Knudsen and/or product layer diffusion limitations. There is a need for a standardized, industrially-verified testing procedure for determining sorbent performance. In fact, once a proven methodology is developed and an index of performance established, it will be possible to identify the best sorbent for a particular coal-fired FBC.

Original languageEnglish (US)
Number of pages8
StatePublished - Jan 1 1991
EventProceedings of the 14th Annual Energy-Sources Technology Conference and Exhibition - Houston, TX, USA
Duration: Jan 20 1991Jan 23 1991


OtherProceedings of the 14th Annual Energy-Sources Technology Conference and Exhibition
CityHouston, TX, USA

All Science Journal Classification (ASJC) codes

  • Geology
  • Geotechnical Engineering and Engineering Geology

Fingerprint Dive into the research topics of 'Evaluation of sorbents for capturing SO<sub>2</sub> in fluidized-bed combustion systems'. Together they form a unique fingerprint.

Cite this