Characterization of PCDD/Fs and dioxin-like PCBs in flue gas from thermal industrial processes in Vietnam: A comprehensive investigation on emission profiles and levels

Thị, Ngọc Mai Phạm; Anh, Hoang Quoc; Nghiem, Xuan Truong; Tu, Binh Minh; Dao, Thi Nhung; Nguyen, My Hang

doi:10.1016/j.chemosphere.2019.03.024

Cited by 43 publications

(13 citation statements)

References 51 publications

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“…Pham et al reported similar samples from thermal plants, including MSW incinerators, coal-fired power plants, steel-making plants, and a cement kiln, etc., in Vietnam, but the mechanism is not clear. 47 To conclude, there are few differences of distribution between CCT and NOC, but there are different 1,2,3,4,6,7,8-HpCDD, OCDD, and 2,3,4,6,7,8-HxCDF fractions in the flue gas. simultaneously.…”

Section: Resultsmentioning

confidence: 83%

“…However, the main TEQ contributors of PCDD/Fs in fly ash are 2,3,7,8-TCDD and 2,3,4,7,8-PeCDF, accounting for 45.50% (CCT) and 44.80% (NOC) for 2,3,7,8-TCDD and 16.17 and 15.85% for 2,3,4,7,8-PeCDF, even with their lower mass concentrations. Pham et al reported similar samples from thermal plants, including MSW incinerators, coal-fired power plants, steel-making plants, and a cement kiln, etc., in Vietnam, but the mechanism is not clear . To conclude, there are few differences of distribution between CCT and NOC, but there are different 1,2,3,4,6,7,8-HpCDD, OCDD, and 2,3,4,6,7,8-HxCDF fractions in the flue gas.…”

Section: Results and Discussionmentioning

confidence: 86%

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Emission Characteristics and Formation Pathways of PCDD/Fs from Cocombustion of Municipal Solid Waste in a Large-Scale Coal-Fired Power Plant

Ying

et al. 2021

Energy Fuels

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This study is based on a 300 MW coal-fired power plant cocombusting 2% of MSW, focusing on the emission characteristics and formation pathway of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). Data from two scenarios, including the cocombustion test (CCT) and normal operation conditions (NOCs), are comprehensively analyzed, indicating that the TEQ concentration of PCDD/Fs increases by 12.69% during cocombustion but still satisfied the national emission limits. The purification efficiencies of toxic PCCD/Fs in CCT and NOC are 41.28 and 28.33%, respectively. Following this, major air pollutant emissions could also satisfy the national standard and even meet the zero-emission requirement. For flue gas in both CCT and NOC, 1,2,3,4,6,7,8-HpCDD, OCDD, 2,3,4,6,7,8-HxCDF, and 1,2,3,4,6,7,8-HpCDF are the main contributors to 2,3,7,8-PCDD/Fs on the mass concentration level, while OCDD and OCDF dominate in fly ash. The major difference is that the CCT condition has a higher fraction of 1,2,3,4,6,7,8-HpCDD, OCDD, and lower contents of 2,3,4,6,7,8-HxCDF to NOC. Furthermore, the distribution of integral 136 PCDD/F congeners also show infinite variation between CCT and NOC, but with a huge gap in the quantity of different isomers. However, cocombustion affects the potential formation routes, as PCDD/Fs from de novo synthesis and DD chlorination dominate the formation pathways in NOC. In contrast, PCDD/Fs from the CP-route of precursor synthesis are mostly occupied under NOCs, possibly due to the incineration deterioration caused by MSW that generates more precursors. Additionally, there is little correlation with a mutual Pearson correlation coefficient (R 2) of 0.2474 between HCl and PCDD/Fs in the flue gas, indicating the lessened influence of high-temperature gaseous synthesis by imported MSW.

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Section: Resultsmentioning

confidence: 83%

Section: Results and Discussionmentioning

confidence: 86%

Emission Characteristics and Formation Pathways of PCDD/Fs from Cocombustion of Municipal Solid Waste in a Large-Scale Coal-Fired Power Plant

Ying

et al. 2021

Energy Fuels

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“…Similarly, automatic smoke sampler with sampling gun was used to measure dust. According to the USA EPA23a method, flue gas sampling was isokinetically collected, and dioxins were preprocessed and measured [29]. The final flue gas concentration (Table 5) meets the emission standard of waste incineration.…”

Section: Engineering Application Of Rotary Kilnmentioning

confidence: 99%

Experimental and Numerical Simulation Study on Co-Incineration of Solid and Liquid Wastes for Green Production of Pesticides

Zhang

et al. 2019

Processes

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A large amount of solid and liquid waste is produced in pesticide production. It is necessary to adopt appropriate disposal processes to reduce pollutant emissions. A co-incineration scheme for mixing multi-component wastes in a rotary kiln was proposed for waste disposal from pesticide production. According to the daily output of solid and liquid wastes, the proportion of mixing was determined. An experiment of the co-incineration of solid and liquid wastes was established. Experimental results showed that the mixed waste could be completely disposed at 850 °C, and the residence time in the kiln exceeded 1 h. A model method for mixture and diesel oil-assisted combustion was proposed. Numerical simulation was performed to predict the granular motion and reveal the combustion interactions of the co-incineration of mixed wastes in the rotary kiln. Simulation results reproduced movements, such as rolling and cascading, and obtained the optimum rotational speed and diesel oil flow for the rotary kiln incineration operation. The simulation showed that the temperature in the kiln was maintained at 850 °C, and the mass fraction of CO and O2 at the outlet reached the standard for the complete combustion of the waste. Finally, the rotary kiln incineration and flue gas treatment processes were successfully applied in engineering for green production of pesticides.

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“…With the growing concern about environmental issues, the pollution problems caused by the foundry industry must be seriously and urgently investigated (Collina et al, 2017;Yang et al, 2020;Li et al, 2018;Yang and Zhang, 2018) Companies belonging to the foundry industry are more likely to come under public scrutiny, and therefore they are required to reduce emission levels by using pollution control Devices (PCDs). In this context, theorists and practitioners increasingly consider the need to install PCDs in the foundry industry (Mitchell, 2006;Rathi, 2003; Unnikrishnan and Hegde, 2007;Pham et al, 2019). In addition, European regulations have prompted the foundry industry to use PCDs [21][22][23] .…”

Section: Introductionmentioning

confidence: 99%

Investigation on Pollution Control Device (PCD) In Foundry Industry to Reduce Environmental Chemicals

Ramaswamy¹,

Jule²,

Nagaprasad³

et al. 2021

Preprint

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Right from the olden days, many products have been made according to foundry practices in order to generate prosperity in the societies in which they operate, while reaping these types of benefits through the operation of foundries. It is alarming that the emissions released by foundries affect human health. Therefore, foundries installed Pollution Control devices (PCDs), in accordance with this development; researchers examined the effectiveness of these PCDs in controlling emissions from foundries in different parts of the world. The emission control obtained by installing these PCDs is explained in this article based on the data gathered from the survey. The result of the study indicated that the cartridge filter built into the induction furnace achieves the best efficiency in controlling contamination from foundries. Interestingly, the operation of the cartridge filter has yet to be documented. Therefore, the construction, operation, the performance of the cartridge filter, and its efficiency in achieving contamination control in foundries are described. The article ends by emphasizing the need to conduct surveys in foundries in which a cartridge filter is installed. The results of this study will provide useful information on the use of cartridge filters in induction furnaces to reduce foundry emissions.

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Characterization of PCDD/Fs and dioxin-like PCBs in flue gas from thermal industrial processes in Vietnam: A comprehensive investigation on emission profiles and levels

Cited by 43 publications

References 51 publications

Emission Characteristics and Formation Pathways of PCDD/Fs from Cocombustion of Municipal Solid Waste in a Large-Scale Coal-Fired Power Plant

Emission Characteristics and Formation Pathways of PCDD/Fs from Cocombustion of Municipal Solid Waste in a Large-Scale Coal-Fired Power Plant

Experimental and Numerical Simulation Study on Co-Incineration of Solid and Liquid Wastes for Green Production of Pesticides

Investigation on Pollution Control Device (PCD) In Foundry Industry to Reduce Environmental Chemicals

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