Formation Pathways and Emission Characteristics of PCDD/Fs during Co-combustion Tests of Sewage Sludge in Coal-fired Power Plants
Abstract This study was conducted in a full-scale coal-fired power plant (350 MW), mainly investigating the co-combustion influence of sewage sludge (SS) on the formation and emission characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). The introduction of SS enhanced th...
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.230178 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1823862853764907008 |
|---|---|
| author | Xiangbo Zou Ji Ye Chuangting Chen Hui Huang Wenxin Yu Yuxuan Ying Tieying Mao Yunfeng Ma Bingjian Zhu Xiaoqing Lin |
| author_facet | Xiangbo Zou Ji Ye Chuangting Chen Hui Huang Wenxin Yu Yuxuan Ying Tieying Mao Yunfeng Ma Bingjian Zhu Xiaoqing Lin |
| author_sort | Xiangbo Zou |
| collection | DOAJ |
| description | Abstract This study was conducted in a full-scale coal-fired power plant (350 MW), mainly investigating the co-combustion influence of sewage sludge (SS) on the formation and emission characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). The introduction of SS enhanced the formation of major air pollutants such as NOx, SO2, and dust, but their emission concentrations still met the ultra-low emission requirements. By adding 3% and 6% SS, the formation concentrations of PCDD/Fs in flue gas at the economizer increased from 0.1317 to 0.2651 and 0.6023 ng m−3, respectively, and the corresponding I-TEQ concentrations increased from 0.0104 to 0.023 and 0.058 ng I-TEQ m−3, respectively. The emission concentrations of PCDD/F were steadily reduced to 0.0347–0.0645 ng Nm−3 (0.0021–0.0034 ng I-TEQ Nm−3) at the stack outlet. In comparison, the increased co-combustion ratio of SS decreased the 2,3,7,8-PCDD/F concentrations from 0.0222 to 0.0197–0.0098 ng g−1 and caused the change of dominant component from PCDDs (72.8%) to PCDFs (57.4%–59.5%) due to the inhibition effect of S-based substances. During the co-combustion process, de novo synthesis was confirmed as the major formation route of PCDD/Fs. Cu and Cl in mixed fuel of coal and SS were highly correlated with the parameters related to PCDD/Fs during co-combustion, which should be strictly limited to prevent large regeneration amounts of PCDD/Fs during the co-combustion process. The results provide an essential reference for controlling PCDD/F formation in the co-combustion process of SS and coal. |
| format | Article |
| id | doaj-art-e9f4e021fad04641877a99fba40869b6 |
| 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-e9f4e021fad04641877a99fba40869b62025-02-09T12:24:08ZengSpringerAerosol and Air Quality Research1680-85842071-14092023-11-0124111410.4209/aaqr.230178Formation Pathways and Emission Characteristics of PCDD/Fs during Co-combustion Tests of Sewage Sludge in Coal-fired Power PlantsXiangbo Zou0Ji Ye1Chuangting Chen2Hui Huang3Wenxin Yu4Yuxuan Ying5Tieying Mao6Yunfeng Ma7Bingjian Zhu8Xiaoqing Lin9Guangdong Energy Group Co., Ltd.Guangdong Energy Group Science and Technology Research Institute Co., Ltd.Guangdong Energy Group Co., Ltd.Guangdong Energy Group Co., Ltd.Huaneng Shandong Shidao Bay Nuclear Power Co., Ltd.State Key Laboratory for Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang UniversityState Key Laboratory for Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang UniversitySchool of Environment, Hangzhou Institute for Advanced Study, UCASChina Power International Development Co., Ltd.State Key Laboratory for Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang UniversityAbstract This study was conducted in a full-scale coal-fired power plant (350 MW), mainly investigating the co-combustion influence of sewage sludge (SS) on the formation and emission characteristics of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). The introduction of SS enhanced the formation of major air pollutants such as NOx, SO2, and dust, but their emission concentrations still met the ultra-low emission requirements. By adding 3% and 6% SS, the formation concentrations of PCDD/Fs in flue gas at the economizer increased from 0.1317 to 0.2651 and 0.6023 ng m−3, respectively, and the corresponding I-TEQ concentrations increased from 0.0104 to 0.023 and 0.058 ng I-TEQ m−3, respectively. The emission concentrations of PCDD/F were steadily reduced to 0.0347–0.0645 ng Nm−3 (0.0021–0.0034 ng I-TEQ Nm−3) at the stack outlet. In comparison, the increased co-combustion ratio of SS decreased the 2,3,7,8-PCDD/F concentrations from 0.0222 to 0.0197–0.0098 ng g−1 and caused the change of dominant component from PCDDs (72.8%) to PCDFs (57.4%–59.5%) due to the inhibition effect of S-based substances. During the co-combustion process, de novo synthesis was confirmed as the major formation route of PCDD/Fs. Cu and Cl in mixed fuel of coal and SS were highly correlated with the parameters related to PCDD/Fs during co-combustion, which should be strictly limited to prevent large regeneration amounts of PCDD/Fs during the co-combustion process. The results provide an essential reference for controlling PCDD/F formation in the co-combustion process of SS and coal.https://doi.org/10.4209/aaqr.230178Sewage sludgeCo-combustionPCDD/FsFormation pathwaysEmission characteristics |
| spellingShingle | Xiangbo Zou Ji Ye Chuangting Chen Hui Huang Wenxin Yu Yuxuan Ying Tieying Mao Yunfeng Ma Bingjian Zhu Xiaoqing Lin Formation Pathways and Emission Characteristics of PCDD/Fs during Co-combustion Tests of Sewage Sludge in Coal-fired Power Plants Aerosol and Air Quality Research Sewage sludge Co-combustion PCDD/Fs Formation pathways Emission characteristics |
| title | Formation Pathways and Emission Characteristics of PCDD/Fs during Co-combustion Tests of Sewage Sludge in Coal-fired Power Plants |
| title_full | Formation Pathways and Emission Characteristics of PCDD/Fs during Co-combustion Tests of Sewage Sludge in Coal-fired Power Plants |
| title_fullStr | Formation Pathways and Emission Characteristics of PCDD/Fs during Co-combustion Tests of Sewage Sludge in Coal-fired Power Plants |
| title_full_unstemmed | Formation Pathways and Emission Characteristics of PCDD/Fs during Co-combustion Tests of Sewage Sludge in Coal-fired Power Plants |
| title_short | Formation Pathways and Emission Characteristics of PCDD/Fs during Co-combustion Tests of Sewage Sludge in Coal-fired Power Plants |
| title_sort | formation pathways and emission characteristics of pcdd fs during co combustion tests of sewage sludge in coal fired power plants |
| topic | Sewage sludge Co-combustion PCDD/Fs Formation pathways Emission characteristics |
| url | https://doi.org/10.4209/aaqr.230178 |
| work_keys_str_mv | AT xiangbozou formationpathwaysandemissioncharacteristicsofpcddfsduringcocombustiontestsofsewagesludgeincoalfiredpowerplants AT jiye formationpathwaysandemissioncharacteristicsofpcddfsduringcocombustiontestsofsewagesludgeincoalfiredpowerplants AT chuangtingchen formationpathwaysandemissioncharacteristicsofpcddfsduringcocombustiontestsofsewagesludgeincoalfiredpowerplants AT huihuang formationpathwaysandemissioncharacteristicsofpcddfsduringcocombustiontestsofsewagesludgeincoalfiredpowerplants AT wenxinyu formationpathwaysandemissioncharacteristicsofpcddfsduringcocombustiontestsofsewagesludgeincoalfiredpowerplants AT yuxuanying formationpathwaysandemissioncharacteristicsofpcddfsduringcocombustiontestsofsewagesludgeincoalfiredpowerplants AT tieyingmao formationpathwaysandemissioncharacteristicsofpcddfsduringcocombustiontestsofsewagesludgeincoalfiredpowerplants AT yunfengma formationpathwaysandemissioncharacteristicsofpcddfsduringcocombustiontestsofsewagesludgeincoalfiredpowerplants AT bingjianzhu formationpathwaysandemissioncharacteristicsofpcddfsduringcocombustiontestsofsewagesludgeincoalfiredpowerplants AT xiaoqinglin formationpathwaysandemissioncharacteristicsofpcddfsduringcocombustiontestsofsewagesludgeincoalfiredpowerplants |