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The Comparison of Several Standard Materials and Techniques for the Warren-Averbach Determination of Microstructure Characteristics of Calcium Hydroxide Sorbent Materials

Published online by Cambridge University Press:  06 March 2019

Frank E. Briden
Frank E. Briden*
Affiliation:
U.S. Environmental Protection Agency, Air and Energy Engineering Research Laboratory, Research Triangle Park, NC 27711
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Extract

The Air and Energy Engineering Research Laboratory (AEERL) has been investigating the injection of dry calcium hydroxide into combustion streams for the removal of sulfur oxides. It has been known, for some time, that the reactivity of Ca(OH)2 with sulfur oxides varies over a wide range for different batches of calcium hydroxide. The reactivity is a critical factor in the economics of the process. Because of this it is desirable to have a method to predict the reactivity of calcium hydroxide batches. The reactivity can be affected by many factors including the origin of the calcium carbonate mineral from which the hydroxide is produced, the production conditions, and the concentration of additives used for reactivity enhancement. It has been theorized that all of the preceding contribute to such physical characteristics as surface area, particle size, and porosity. The examination of these physical characteristics has provided the basis for understanding the reaction processes but has net provided all the factors necessary to correlate intrinsic sorbent characteristics with reactivity.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 33: Thirty-Eighth Annual Conference on Applications of X-ray Analysis, July 31 - August 4, 1989 , 1989 , pp. 383 - 388
Copyright
Copyright © International Centre for Diffraction Data 1989

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References

1. Briden, F.E. and Natschke, D.F., The Characterization of a Solid Sorbent With Crystallite Size and Strain Data From X-ray Diffraction Line Broadening, Advances in X-ray Analysis. 32, 437–441 Plenum Press, NY, (1989).Google Scholar
2. Warren, B.E., “X-ray Diffraction,” Addison Wesley Co., (1969), Chapter 13.Google Scholar
3. Bruce, K.R., “Furnace Sorbent Reactivity Testing for Control of SO2 Emissions From Illinois Coals.” Acurex Corporation, Durham, NC, Personal Communication, (1989).Google Scholar