Chemical Recycling of Polycarbonate to Raw Materials by Thermal Decomposition with Calcium Hydroxide/Steam
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- Toshiaki Yoshioka
- Environmental Conservation Research Institute, Tohoku University
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- Katsuya Sugawara
- Environmental Conservation Research Institute, Tohoku University
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- Tadaaki Mizoguchi
- Environmental Conservation Research Institute, Tohoku University
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- Akitsugu Okuwaki
- Graduate School of Environment Studies, Tohoku University
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Abstract
<jats:title>Abstract</jats:title> <jats:p>We investigated the influence of the decomposition conditions (temperature: 500, 700, 900 °C, steam concentration: 0, 35, 86 vol %, Ca(OH)2/PC molar ratio: 0 or 5) on polycarbonate (PC). Without steam and Ca(OH)2 the liquefaction yield was 57 wt % (low and high boiling products 14, 43 wt %, respectively), the gasification yield 12 wt %, and the carbonization yield 31 wt % at 500 °C. At a steam concentration of 86 vol %, 84 wt % liquids (low and high boiling products 17, 67 wt %, respectively), 1 wt % gases and 15 wt % residues were observed. The amount of low boiling products increased from 17 to 31 wt %, and the amount of high boiling products decreased from 67 to 49 wt % when Ca(OH)2 was added at a steam concentration 86 vol %. At this time, the yield of phenol in the low boiling fraction increased from 15 to 74 mol % (20 wt % of all products).</jats:p>
Journal
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- Chemistry Letters
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Chemistry Letters 34 (3), 282-283, 2005-01-29
Oxford University Press (OUP)
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Details 詳細情報について
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- CRID
- 1360846644040777216
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- NII Article ID
- 10014463824
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- NII Book ID
- AA00603318
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- ISSN
- 13480715
- 03667022
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- Data Source
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- Crossref
- CiNii Articles