Pyrolysis and Dioxin Production Characteristics of Mineralized Waste in Landfills
Abstract Compared with original municipal solid waste (MSW), mineralized waste (MW) has a lower moisture content, higher calorific value, and better energy utilization potential. However, due to the high chlorine content of MW and the presence of heavy metals, dioxin and other harmful substances are...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Springer
2023-11-01
|
| Series: | Aerosol and Air Quality Research |
| Subjects: | |
| Online Access: | https://doi.org/10.4209/aaqr.230132 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1823862850298314752 |
|---|---|
| author | Jian-Ying Fu Han-Cheng Ma Wen-Tao Jiao Xu Xu Xiao-Qing Lin Xiao-Dong Li Ming-Xiu Zhan |
| author_facet | Jian-Ying Fu Han-Cheng Ma Wen-Tao Jiao Xu Xu Xiao-Qing Lin Xiao-Dong Li Ming-Xiu Zhan |
| author_sort | Jian-Ying Fu |
| collection | DOAJ |
| description | Abstract Compared with original municipal solid waste (MSW), mineralized waste (MW) has a lower moisture content, higher calorific value, and better energy utilization potential. However, due to the high chlorine content of MW and the presence of heavy metals, dioxin and other harmful substances are easily produced during pyrolysis. Therefore, this study investigated the effects of different external chlorine sources and pretreatment methods on the pyrolysis characteristics of MW and the formation of polychlorinated dibenzo-p-dioxins/polychloro dibenzofurans (PCDD/Fs) in pyrolysis fuel gas. This study also compared the heavy metal speciation in char formed during MW pyrolysis using in situ X-ray photoelectron spectroscopy. The results show that carbon and chlorine mainly exist in the form of C and organic chlorine and CuCl2, respectively. Based on thermogravimetric analysis, MW pyrolysis is completed at 200–850°C. The char ignition loss rate is ~20%, and the maximum calorific value is 14,217 kJ kg−1. The gaseous heavy metals in fuel gas is relatively stable, but the heavy metal concentration slightly decreases. Compared with other external chlorine sources (NaCl and PVC), CuCl2 has the strongest catalytic effect to promote the gaseous PCDD/Fs formation during pyrolysis. During MW pyrolysis, the PCDD/F concentration is 49.13 ng m−3. When the soil content of MW is high, the concentration of PCDD/Fs is low; it decreases from 10.46 to 7.21 ng m−3. During the pyrolysis, the PCDD/F concentration of MW is higher than that of the original MSW. After the addition of 30% biomass, the PCDD/F content increases to 16.92 ng m−3. The experimental results of this study provide novel technical guidance for the resource utilization of MW. |
| format | Article |
| id | doaj-art-d9d8c7d00f17424f96b5d92f71101a65 |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2023-11-01 |
| publisher | Springer |
| record_format | Article |
| series | Aerosol and Air Quality Research |
| spelling | doaj-art-d9d8c7d00f17424f96b5d92f71101a652025-02-09T12:24:14ZengSpringerAerosol and Air Quality Research1680-85842071-14092023-11-0124111410.4209/aaqr.230132Pyrolysis and Dioxin Production Characteristics of Mineralized Waste in LandfillsJian-Ying Fu0Han-Cheng Ma1Wen-Tao Jiao2Xu Xu3Xiao-Qing Lin4Xiao-Dong Li5Ming-Xiu Zhan6State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang UniversityCollege of Metrology and Measurement Engineering, China Jiliang UniversityResearch Center for Eco-Environmental Sciences, Chinese Academy of Sciences, BeijingCollege of Metrology and Measurement Engineering, China Jiliang UniversityState Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang UniversityState Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang UniversityCollege of Metrology and Measurement Engineering, China Jiliang UniversityAbstract Compared with original municipal solid waste (MSW), mineralized waste (MW) has a lower moisture content, higher calorific value, and better energy utilization potential. However, due to the high chlorine content of MW and the presence of heavy metals, dioxin and other harmful substances are easily produced during pyrolysis. Therefore, this study investigated the effects of different external chlorine sources and pretreatment methods on the pyrolysis characteristics of MW and the formation of polychlorinated dibenzo-p-dioxins/polychloro dibenzofurans (PCDD/Fs) in pyrolysis fuel gas. This study also compared the heavy metal speciation in char formed during MW pyrolysis using in situ X-ray photoelectron spectroscopy. The results show that carbon and chlorine mainly exist in the form of C and organic chlorine and CuCl2, respectively. Based on thermogravimetric analysis, MW pyrolysis is completed at 200–850°C. The char ignition loss rate is ~20%, and the maximum calorific value is 14,217 kJ kg−1. The gaseous heavy metals in fuel gas is relatively stable, but the heavy metal concentration slightly decreases. Compared with other external chlorine sources (NaCl and PVC), CuCl2 has the strongest catalytic effect to promote the gaseous PCDD/Fs formation during pyrolysis. During MW pyrolysis, the PCDD/F concentration is 49.13 ng m−3. When the soil content of MW is high, the concentration of PCDD/Fs is low; it decreases from 10.46 to 7.21 ng m−3. During the pyrolysis, the PCDD/F concentration of MW is higher than that of the original MSW. After the addition of 30% biomass, the PCDD/F content increases to 16.92 ng m−3. The experimental results of this study provide novel technical guidance for the resource utilization of MW.https://doi.org/10.4209/aaqr.230132Mineralized wasteLandfillPyrolysisDioxinsHeavy metalExternal chlorine |
| spellingShingle | Jian-Ying Fu Han-Cheng Ma Wen-Tao Jiao Xu Xu Xiao-Qing Lin Xiao-Dong Li Ming-Xiu Zhan Pyrolysis and Dioxin Production Characteristics of Mineralized Waste in Landfills Aerosol and Air Quality Research Mineralized waste Landfill Pyrolysis Dioxins Heavy metal External chlorine |
| title | Pyrolysis and Dioxin Production Characteristics of Mineralized Waste in Landfills |
| title_full | Pyrolysis and Dioxin Production Characteristics of Mineralized Waste in Landfills |
| title_fullStr | Pyrolysis and Dioxin Production Characteristics of Mineralized Waste in Landfills |
| title_full_unstemmed | Pyrolysis and Dioxin Production Characteristics of Mineralized Waste in Landfills |
| title_short | Pyrolysis and Dioxin Production Characteristics of Mineralized Waste in Landfills |
| title_sort | pyrolysis and dioxin production characteristics of mineralized waste in landfills |
| topic | Mineralized waste Landfill Pyrolysis Dioxins Heavy metal External chlorine |
| url | https://doi.org/10.4209/aaqr.230132 |
| work_keys_str_mv | AT jianyingfu pyrolysisanddioxinproductioncharacteristicsofmineralizedwasteinlandfills AT hanchengma pyrolysisanddioxinproductioncharacteristicsofmineralizedwasteinlandfills AT wentaojiao pyrolysisanddioxinproductioncharacteristicsofmineralizedwasteinlandfills AT xuxu pyrolysisanddioxinproductioncharacteristicsofmineralizedwasteinlandfills AT xiaoqinglin pyrolysisanddioxinproductioncharacteristicsofmineralizedwasteinlandfills AT xiaodongli pyrolysisanddioxinproductioncharacteristicsofmineralizedwasteinlandfills AT mingxiuzhan pyrolysisanddioxinproductioncharacteristicsofmineralizedwasteinlandfills |