Catalytic destruction of PCDDs/PCFFs in municipal solid waste flue gas

Hiraoka, Masakatsu; Takeda, Nobuo; Kasakura, Tadao; Imoto, Yoshinori; Tsuboi, Haruhito; Iwasaki, Toshihiko

doi:10.1016/0045-6535(91)90169-e

Cited by 13 publications

(13 citation statements)

References 1 publication

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“…For example, a commercial catalyst pack of platinum on Ti/SiO placed in the flue-gas duct of a MSW incinerator was found to be effective in destroying most of the PCDD/F [153]. PCDD/F catalysts tend to be effective also for NO x removal [154].…”

Section: Destruction Reactions On the Solid Phasementioning

confidence: 98%

The formation of dioxins in combustion systems

Stanmore

2004

Combustion and Flame

430

215

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Section: Destruction Reactions On the Solid Phasementioning

confidence: 98%

The formation of dioxins in combustion systems

Stanmore

2004

Combustion and Flame

430

215

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“…18 Platinum is often used in automotive catalyst converters, which suggests that the presence of dioxins and furans are small in vehicle exhausts equipped with this kind of device. 12 However, emissions of these pollutants could be significant in the initial operating time of the vehicle, a situation in which the catalytic converter is still below its normal working temperature and not so effective at PCDD/ F conversion.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, copper catalysis can be inhibited by amine-deactivating action on copper surfaces; chlorine action also may be inhibited by the presence of SO 2 in the gaseous phase 11 ; platinum promotes other reactions inhibiting PCDD/F formation. 12 Gasoline containing ethanol in its formulation needs no addition of tetra-ethyl lead from gasoline. Tetra-ethyl lead additives are typically made with chlorinated hydrocarbons that could promote further PCDD/F formation during combustion 13 .…”

Section: Discussionmentioning

confidence: 99%

Comparison of Emission of Dioxins and Furans from Gasohol- and Ethanol-Powered Vehicles

Abrantes¹,

Assunção

Pesquero

et al. 2011

Journal of the Air & Waste Management Association

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The exhaust emissions of 17 polychlorinated dibenzo-pdioxins and polychlorinated dibenzofurans (PCDD/Fs) were investigated in two spark-ignition light-duty vehicles, one gasohol-fueled and a flexible-fuel one fueled with hydrated ethanol. Gasohol is a mixture of gasoline and 22% ethanol. The influence of fuel type and quality, lubricant oil type, and use of fuel additives on the formation of these compounds was tested using standardized U.S. Federal Test Procedure (FTP)-75 cycle tests. The sampling of the PCDD/Fs followed the recommendations of a modified U.S. Environmental Protection Agency (EPA) Method 23 (www.epa.gov/ttn/ emc/promgate/m-23.pdf) and the analysis basically followed the U.S. EPA Method 8290 (http://www.epa.gov/osw/ hazard/testmethods/sw846/pdfs/8290a.pdf). Results showed that emission factors of PCDD/Fs for the gasohol vehicle varied from undetected to 0.068 pg international toxic equivalency (I-TEQ) km À1 (average of 0.0294 pg I-TEQ km À1), whereas in the ethanol vehicle they varied from 0.004 to 0.157 pg (I-TEQ) km À1 (average of 0.031 pg I-TEQ km À1

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“…Ide et al investigated the destruction efficiency of organic compounds in SCR and showed that area velocity Av is one of the major parameters determining the destruction efficiency, which is defined as (56) where G is the total gas flow rate (Nm 3 /h) and Ac is surface area of the catalysts (m 2 ). Hiraoka et al showed that the operating temperature and the structural shape of catalysts are also important parameters on the destruction rate (57). On the basis of several experimental studies, temperature, area velocity, and content of effective catalyst material (generally V2O5) are considered to be the relevant parameters.…”

Section: Removal Of Pcdd/f By Adsorptionmentioning

confidence: 99%

Evaluation of Polychlorinated Dibenzo-p-dioxin/Dibenzofuran (PCDD/F) Emission in Municipal Solid Waste Incinerators

Shin

Choi

et al. 1999

Environ. Sci. Technol.

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This paper summarizes an engineering approach taken for 10 commercial MSW incinerators to formulate a basis for PCDD/F emission reduction schemes and to interpret the measurement results before and after the plant modifications of moderate scale. Control strategy of PCDD/F emission from the operating incinerators can be established on the basis of the interpretation of reliable measurements as well as understanding of the formation/destruction processes. The fate of PCDD/F is known to be influenced by the flue gas subprocesses: the initial formation/ oxidation in the combustion chamber, reformation through synthesis, removal by adsorption, and catalytic destruction. A simplified model is proposed for PCDD/F level at various stages of the flue gas, basically integrating the reaction kinetic rates at the corresponding state. Since the kinetic rate is dependent on temperature, time-temperature history of the flue gas is considered as the important input data. Using the plant design and operating conditions, this global prediction model calculates the PCDD/F level not only at the stack but also at the process midstream. The model predictions are discussed along with measurement results from the different design of incinerator plants.

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Catalytic destruction of PCDDs/PCFFs in municipal solid waste flue gas

Cited by 13 publications

References 1 publication

The formation of dioxins in combustion systems

The formation of dioxins in combustion systems

Comparison of Emission of Dioxins and Furans from Gasohol- and Ethanol-Powered Vehicles

Evaluation of Polychlorinated Dibenzo-p-dioxin/Dibenzofuran (PCDD/F) Emission in Municipal Solid Waste Incinerators

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