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Thermal-behavior study of chlorine released from composite refuse derived fuel
Zhi-Wei Song1, Yi-Bo Lv, Long-Yan Tong
1School of Resource and Environment Engineering, Heilongjiang Institute of Science and Technology, Harbin 150027, China. szwcyp@tom.com
Waste Management (New York, N.Y.)
|April 4, 2009
Summary
This study analyzes chlorine emissions from composite refuse derived fuel (CRDF) combustion to minimize pollution. High inorganic chlorine release occurs during combustion and pyrolysis, with pyrolysis producing more organic chlorine at higher temperatures.
Area of Science:
- Environmental Science
- Chemical Engineering
- Combustion Science
Background:
- Incineration of composite refuse derived fuel (CRDF) can lead to secondary pollution.
- Understanding chlorine behavior during CRDF combustion is crucial for emission control.
Purpose of the Study:
- To analyze the combustion characteristics of CRDF containing coal.
- To investigate the chlorine emission behavior during CRDF incineration.
Main Methods:
- Thermogravimetric analysis (TGA) was used to study combustion features.
- Gas chromatography-mass spectrometry (GC-MS) analyzed chlorine emission behavior.
- A self-designed TGA system was employed for CRDF thermal processing analysis.
Main Results:
- Inorganic chlorine release reached 90% during combustion between 773.15–873.15K.
- Pyrolysis at 723.15K resulted in approximately 84% inorganic chlorine release.
- Higher organic chlorine concentrations were observed during pyrolysis above 1073.15K.
- CRDF thermal processing showed three distinct phases with significant mass loss: 473–573K (38.50%), 673–773K (20.35%), and 873–1073K (22.25%).
Conclusions:
- Chlorine speciation and release during CRDF combustion and pyrolysis are temperature-dependent.
- Effective control strategies are needed to manage chlorine emissions, particularly organic chlorine at higher pyrolysis temperatures.
- The distinct thermal phases identified provide insights into CRDF decomposition kinetics for optimized incineration.
