Pyrolysis properties and kinetic analysis of lake sediment, as well as evolution characteristics of the gaseous products at 5âË?Ë?C/min,\n10âË?Ë?C/min, and 20âË?Ë?C/min, were investigated by TG-FTIR. Comparison to the TG and DTG curves at different heating rates, the\npyrolysis process at 10âË?Ë?C/min could describe the sediment pyrolysis characteristics better than at 5âË?Ë?C/min and 20âË?Ë?C/min; thus the\nprocess of sediment pyrolysis could be considered as four stages. Fromthe kinetics analysis, the nth-order chemical reactionmodel\nwas suitable to describe the sediment pyrolysis reaction well. The values of n were within 2.55ââ?¬â??3.42 and activation energy
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