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Oxidative Catalytic Decomposition of Toxic Gases Using Hydroxyapatite and Fluorhydroxyapatite

Published online by Cambridge University Press:  15 February 2011

Timothy P. Palucka ,
Nicholas G. Eror  and
Thomas A. Mcnamara
Timothy P. Palucka
Affiliation:
University of Pittsburgh, Department of Materials Science and Engineering, 848 Benedum Engineering Hall, Pittsburgh, PA 15261
Nicholas G. Eror
Affiliation:
University of Pittsburgh, Department of Materials Science and Engineering, 848 Benedum Engineering Hall, Pittsburgh, PA 15261
Thomas A. Mcnamara
Affiliation:
University of Pittsburgh, Department of Materials Science and Engineering, 848 Benedum Engineering Hall, Pittsburgh, PA 15261
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Abstract

An oxidative catalytic route for the decomposition of nerve gases was investigated using hydroxyapatite (HA, chemical composition Ca10(PO4)6(OH)2) and its partially fluorinated analog fluorhydroxyapatite (FHA, Ca10(PO4)6Fx(OH)2−x). Samples were prepared with surface areas ranging from 34 to 238 m2/g to study surface area effects; 1.2 wt. % platinum was deposited on one substrate to investigate the effect of a transition metal on activity and selectivity. Reaction studies were performed using dimethyl methylphosphonate (DMMP), a nerve gas simulant, in a stream of 80 percent nitrogen and 20 percent oxygen at 573 K and atmospheric pressure. High surface area FHA samples showed an increase in the "protection period" (period of 100% conversion) with increasing fluorine substitution; such an increase was not seen for low surface area FHA samples. In the absence of platinum, the reaction products were methanol and dimethyl ether; with platinum, CO2 was also obtained.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 368: Symposium T – Synthesis and Properties of Advanced Catalytic Materials , 1994 , 275
Copyright
Copyright © Materials Research Society 1995

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References

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