Chemical Synthesis Residual Pyrolysis and Combustion: Kinetics and Evolved Gases Investigated by TG-FTIR
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Chemical synthetic residual is one of the solid wastes generated from pharmaceutical industry. The pyrolysis and combustion characteristics of chemical synthesis residual were investigated using a thermogravimetric analyser coupled with Fourier transform infrared spectroscopy (TG-FTIR) in this study. The processes of pyrolysis and combustion can be divided into three stages. The average weight loss rate of pyrolysis process at low temperature was higher than that of combustion. The kinetic parameters of chemical synthesis residual during pyrolysis and combustion were calculated based on the TG results. Acetic acid and 4-aminophenol were the main evolved matter observed in the pyrolysis process. The emission characteristics of combustion at low temperature were similar to that of the pyrolysis, while CO2 was found as the major gaseous product at high temperature. A high temperature about 850°C is needed to make sure the complete combustion of chemical synthesis residual.
Keywordschemical synthesis residual pyrolysis combustion TG-FTIR evolution
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This research is supported by the National Key Research and Development Program of China (2018YFF0215001, 2017YFC0703100), the Innovative Research Groups of the National Natural Science Foundation of China (51621005), the National Natural Science Foundation of China (51676172), and the Fundamental Research Funds for the Central Universities (2016FZA4010).
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