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Kinetics of Municipal Sewage Sludge Thermal Pyrolysis

Jia Xiang-r

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Abstract

The TG and DTG curve of sludge from Shanghai Chengqiao Sewage Treatment Plant were derived from tests of differential thermal balance.Pyrolysis characteristics and kinetics of dried sludge were investigated using thermogravimetric analysis.The result showed there are two temperature ranges in which the sludge quickly lost weight,these two phases are due to release of the volatiles.With the thermogravimetry,the kinetics parameters for the chemical reactions of the two ranges were calculated and the sludge pyrolytic reaction mechanism is discussed.

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What this paper is about

The TG and DTG curve of sludge from Shanghai Chengqiao Sewage Treatment Plant were derived from tests of differential thermal balance.Pyrolysis characteristics and kinetics of dried sludge were investigated using thermogravimetric analysis.The result showed there are two temperature ranges in which the sludge quickly lost weight,these two phases are due to release of the volatiles.With the thermogravimetry,the kinetics parameters for the chemical reactions of the two ranges were calculated and the sludge pyrolytic reaction mechanism is discussed.

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Available abstract

The TG and DTG curve of sludge from Shanghai Chengqiao Sewage Treatment Plant were derived from tests of differential thermal balance.Pyrolysis characteristics and kinetics of dried sludge were investigated using thermogravimetric analysis.The result showed there are two temperature ranges in which the sludge quickly lost weight,these two phases are due to release of the volatiles.With the thermogravimetry,the kinetics parameters for the chemical reactions of the two ranges were calculated and the sludge pyrolytic reaction mechanism is discussed.

Key concepts: Thermogravimetry, Sewage sludge, Pyrolysis, Pyrolytic carbon, Thermogravimetric analysis, Kinetics, Chemistry, Waste management

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