Authors: Mitsuyasu Takata Nobuhisa Watanabe Shuhsaku Yamamoto
Publish Date: 2015/02/15
Volume: 17, Issue: 2, Pages: 282-289
Abstract
Thermochemical destruction of organic Cl and Br compounds in a combustion system was studied A Cl compound and three Br compounds namely 1234tetrachlorobenzene TeCB 1245tetrabromobenzene TeBB tetrabromobisphenol A TBBPA and decabromodiphenyl ether DBDE were used The samples on a boat were combusted at 600 °C followed by gas combustion at 800 900 and 1100 °C An offgas 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 OXRR μg g−1 Halogenated benzene compounds such as TeCB and TeBB were destructed moderately OXRR for these compounds at 800 900 and 1100 °C was 112 35 and 32 μg g−1 and 258 57 and 48 μg g−1 respectively on the other hand the destruction of TBBPA and DBDE namely fire retardants was difficult OXRR at 800 °C for these compounds was 7159 and 718 μg 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 °C Such chemical halogen control is effective to thermal destruction of organic Cl and Br compounds
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