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International Journal of Chemical Engineering
Volume 2018, Article ID 1759602, 7 pages
Research Article

Pyrolysis Characteristics and Kinetic Analysis of Sediment from the Dianchi Lake in China

1Faculty of Architecture Engineering, Kunming University of Science and Technology, Kunming 650224, China
2Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650224, China

Correspondence should be addressed to Huilong Luo; moc.361@lhl_mk

Received 12 October 2017; Revised 26 December 2017; Accepted 9 January 2018; Published 8 February 2018

Academic Editor: Badie I. Morsi

Copyright © 2018 Zhenfen Wu and Huilong Luo. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Pyrolysis properties and kinetic analysis of lake sediment, as well as evolution characteristics of the gaseous products at 5°C/min, 10°C/min, and 20°C/min, were investigated by TG-FTIR. Comparison to the TG and DTG curves at different heating rates, the pyrolysis process at 10°C/min could describe the sediment pyrolysis characteristics better than at 5°C/min and 20°C/min; thus the process of sediment pyrolysis could be considered as four stages. From the kinetics analysis, the nth-order chemical reaction model was suitable to describe the sediment pyrolysis reaction well. The values of n were within 2.55–3.42 and activation energy was ranged from 15.83 KJ/mol to 57.92 KJ/mol at different heating rates. The gaseous products of H2O, CO2, CO, CH4, and SO2 and several functional groups (C-H, C=O, and C-O) could be found from the IR spectrum. From the evolution characteristics with the temperature, there were two evolution peaks for CO2 and one peak for CH4 and SO2. However, the evolution of CO always increased. Besides, the evolution peak for CO2, CH4, and SO2 all shifted to the low temperature region with the decrease of heating rate. The results could provide theoretical basis for harmless treatment and resource utilization of lake sediment.