Dry Sorption of Bromine Compounds in Pyrolysis Gas Derived from Brominated Flame Retardant Plastic with Na2CO3

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  • Kawai Takuji
    Department of Energy Engineering and Science, Nagoya University
  • Mihara Naoto
    Department of Energy Engineering and Science, Nagoya University
  • Ito Tatsuya
    Department of Energy Engineering and Science, Nagoya University
  • Tanahashi Naoki
    Energy Applications Research and Development Center, Chubu Electric Power Co., Inc.
  • Matsuda Hitoki
    Department of Energy Engineering and Science, Nagoya University

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Other Title
  • 臭素系難燃プラスチック熱分解生成ガス中のＢｒ化合物のＮａ２ＣＯ３による乾式吸収除去
  • シュウソケイ ナンネン プラスチック ネツ ブンカイ セイセイ ガスチュウ ノ Br カゴウブツ ノ Na2CO3 ニ ヨル カンシキ キュウシュウ ジョキョ

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Decomposition of methyl bromide (CH3Br) and bromobenzene (C6H5Br) was investigated along with Br sorption from CH3Br or C6H5Br by Na2CO3 sorbent.<BR>Under a CH3Br-N2 atmosphere without Na2CO3, results showed that HBr and C2H2 were generated by thermal decomposition of CH3Br at temperatures greater than 673K. Similarly, under C6H5Br-N2 atmosphere without Na2CO3, both HBr and C6H6 were generated at temperatures higher than 673K.<BR>The presence of Na2CO3 sorbent was found to promote decomposition of CH3Br and C6H5Br at temperatures of 673-973K. During CH3Br and C6H5Br decomposition in the presence of Na2CO3, the formation of NaBr was observed. It was therefore concluded that Br gaseous compounds formed by the decomposition of CH3Br and C6H5Br were absorbed on Na2CO3. Regarding the Br absorption ratio on Na2CO3 sorbent at a temperature of 873K, the Br absorption ratios on Na2CO3 under CH3Br-N2 and C6H5Br-N2 atmospheres were, respectively, 0.50 and 0.29.

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