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By-Product Sulfur from the Stabilization of Coal Solid Wastes

Published online by Cambridge University Press:  21 February 2011

A. J. Gokhalea  and
G. Burnet
A. J. Gokhalea
Affiliation:
Department of Chemical Engineering, Zachary Hall, Texas A&M University, College Station, TX 77843.
G. Burnet
Affiliation:
Ames Laboratory, U.S.D.O.E. and Department of Chemical Engineering, Iowa State University, Ames, IA 50011.
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Abstract

A stabilization process for coal cleaning and coal combustion-related wastes has been developed that uses the energy derived from the fuel contained in the coal cleaning wastes. The wastes are pulverized, when necessary, formed into granules in a rotary pan agglomerator, and then fired to a sintering temperature. The result is a readily disposable product that is highly resistant to environmental degradation. Granules of refuse only, and of refuse/fly ash and refuse/FGD sludge mixtures have been investigated. About 90 wt% of the sulfur in the refuse/sludge mixtures is evolved as SO2 during the combustion/sintering portion of the process. Studies using a microreactor system have shown the generation of SO2 to be a function of temperature and to parallel the decomposition of the sulfur-containing compounds present. Based on laboratory tests, SO2 concentrations of 4–8 vol% are predicted in the SO2-rich off-gases. By-product sulfur recovery from the off-gases appears practical and attractive using current technology that is proven and well established.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 136: Symposium O – Fly Ash and Coal Conversion By-Products V , 1988 , 55
Copyright
Copyright © Materials Research Society 1989

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References

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