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Frontiers of Environmental Science & Engineering >> 2011, Volume 5, Issue 2 doi: 10.1007/s11783-011-0322-6

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

1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; 2. Hangzhou Huanjie Environment Engineering Co. Ltd., Hangzhou 310027, China

Available online: 2011-06-05

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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 CO were distinguished in the pyrolysis process, while CO was the dominant combustion product.

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