An overview of some environmental applications of self-propagating high-temperature synthesis

Abstract The self-propagating high-temperature synthesis (SHS) method is being developed world-wide for the low-cost production of engineering and other functional materials, such as advanced ceramics, intermetallics, catalysts and magnetic materials. The method exploits self-sustaining solid-flame combustion reactions which develop very high internal material temperatures over very short periods. It therefore offers many advantages over traditional methods, such as much lower energy costs, lower environmental impact, ease of manufacture and capability for producing materials with unique properties and characteristics. This report introduces the SHS method and its advantages and discusses a number of its applications with environmental interest, such as highly active catalysts for exhaust emission control and methane conversion and various methods of neutralising or recycling industrial inorganic wastes. Since SHS can be initiated and completed at ordinary environment temperatures, it can also be utilised successfully for dealing with toxic or radioactive materials and contaminated areas by creating in situ large-scale protective coatings or in situ vitrification, consolidation and encapsulation of dangerous wastes.

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