Thermogravimetric coupled with Fourier transform infrared analysis study on thermal treatment of monopotassium phosphate residue

Abstract

In China, safe disposal of hazardous waste is more and more a necessity, urged by rapid economic development. The pyrolysis and combustion characteristics of a residue from producing monopotassium phosphate (monopotassium phosphate residue), considered as a hazardous waste, were studied using a thermogravimetric, coupled with Fourier transform infrared analyzer (TG-FTIR). Both pyrolysis and combustion runs can be subdivided into three stages: drying, thermal decomposition, and final devolatilization. The average weight loss rate during fast thermal decomposition stage in pyrolysis is higher than combustion. Acetic acid, methane, pentane, (acetyl) cyclopropane, 2,4,6-trichlorophenol, CO, and CO₂ were distinguished in the pyrolysis process, while CO₂ was the dominant combustion product.

Keywords

hazardous waste / combustion / pyrolysis / thermogravimetric coupled with Fourier transform infrared analysis (TG-FTIR) / monopotassium phosphate residue

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Acknowledgements

The Project was supported by the National Basic Research Program of China (No. 2011CB201500), the National High Technology Research and Development Program of China (No. 2009AA064704), and the National Project of Scientific and Technical Supporting Program (2007BAC27B04-3).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg