title: Catalytic decomposition of dioxins and other unintentional POPs in flue gas from a municipal waste incinerator (MWI) in China: a pilot testing.
abstract: Unintentionally produced persistent organic pollutants (UPOPs) include polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), dioxin-like polychlorinated biphenyls (dl-PCBs), pentachlorobenzene (PeCBz), and hexachlorobenzene (HxCBz). With the booming of municipal waste incinerators (MWIs) in China, the emission of UPOPs has generated great concern. As an alternative technology of dioxin control, catalytic decomposition has not been used in China, mainly due to the absence of national demonstration projects. Also, the simultaneous removal of various UPOPs has not been well investigated.In this study, a pilot-scale selective catalytic oxidative (SCO) system using a self-developed honeycomb catalyst was built and tested in a typical municipal waste incinerator (MWI) of China. The original concentration of PCDD/Fs in flue gas after the treatment of activated carbon injection (ACI) still exceeded the national emission standard (0.1 ng I-TEQ/Nm3), while the concentrations of PeCBz and HxCBz were one order of magnitude higher than that of PCDD/Fs. For the testing temperature varying from 300 to 200 °C, the removal efficiency of PCDD/Fs range from 39 to 95 %, followed by dl-PCBs with the range of 56-89 %. PeCBz and HxCBz were also removed, though their removal efficiencies were lower than those of PCDD/Fs and dl-PCBs. Both temperature and degree of chlorination influence the removal efficiencies.
authors.affiliation: School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing, 100084, China.
authors.forename: Yuancheng
authors.initials: Y
authors.lastname: Li
authors.affiliation: School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing, 100084, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Yu
authors.affiliation: School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing, 100084, China. huangjun@tsinghua.edu.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: Huang
authors.affiliation: School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing, 100084, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Wang
authors.affiliation: School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing, 100084, China.
authors.forename: Shubo
authors.initials: S
authors.lastname: Deng
authors.affiliation: School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing, 100084, China.
authors.forename: Yujue
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D002384:Catalysis; D002681:China; D002722:Chlorobenzenes / Q000737:chemistry*; D000072318:Dibenzofurans / Q000737:chemistry*; D004147:Dioxins / Q000737:chemistry*; D004784:Environmental Monitoring; D005740:Gases / Q000737:chemistry; D006581:Hexachlorobenzene / Q000032:analysis; D017745:Incineration; D010865:Pilot Projects; D011078:Polychlorinated Biphenyls / Q000737:chemistry*; D000072317:Polychlorinated Dibenzodioxins / Q000737:chemistry*; D018505:Waste Management
chemical_list: D000393:Air Pollutants; D002722:Chlorobenzenes; D000072318:Dibenzofurans; D004147:Dioxins; D005740:Gases; D000072317:Polychlorinated Dibenzodioxins; D006581:Hexachlorobenzene; C003060:pentachlorobenzene; D011078:Polychlorinated Biphenyls
keywords: Catalytic decomposition; Flue gas; MWI; Pilot-scale; UPOPs