4.4 Article

Destruction of organic Cl and Br compounds through incineration enhanced by alkali and alumina addition

Journal

JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
Volume 17, Issue 2, Pages 282-289

Publisher

SPRINGER
DOI: 10.1007/s10163-015-0359-x

Keywords

Organic chlorine; Organic bromine; PCBs; Incineration; Destruction

Funding

  1. Japan Environmental Ministry [3K113025]

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Thermochemical destruction of organic Cl and Br compounds in a combustion system was studied. A Cl compound and three Br compounds, namely, 1,2,3,4-tetrachlorobenzene (TeCB), 1,2,4,5-tetrabromobenzene (TeBB), tetrabromobisphenol A (TBBPA), and decabromodiphenyl ether (DBDE) were used. The samples on a boat were combusted at 600 A degrees C followed by gas combustion at 800, 900, and 1,100 A degrees C. An off-gas was adsorptively collected and introduced into a Cl and Br detector by thermal desorption. The destruction efficiency was evaluated using the organic halogen residual ratio (OX-RR) (mu g g(-1)). Halogenated benzene compounds such as TeCB and TeBB were destructed moderately (OX-RR for these compounds at 800, 900 and 1,100 A degrees C was 112, 35 and 32 mu g g(-1) and 258, 57 and 48 mu g g(-1), respectively); on the other hand, the destruction of TBBPA and DBDE, namely fire retardants, was difficult (OX-RR at 800 A degrees C for these compounds was 7,159 and 718 mu g g(-1), respectively). Addition of an alkali and an alumina to a sample enhanced the destruction of organic compounds drastically by several times. This destruction enhancement occurred at temperature as low as 600 A degrees C. Such chemical halogen control is effective to thermal destruction of organic Cl and Br compounds.

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