超臨界水, 超臨界メタノールおよび超臨界エタノール中におけるポリ-<i>p</i>-キシレングリコールの分解反応

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タイトル別名
  • Pyrolysis of Poly-<i>p</i>-xyleneglycol in Supercritical Water, Supercritical Methanol, and Supercritical Ethanol
  • チョウリンカイスイ チョウリンカイ メタノール オヨビ チョウリンカイ エタノール チュウ ニ オケル ポリ p

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Pyrolysis of poly-p-xyleneglycol(PPXG) in supercritical water, supercritical methanol and supercritical ethanol were studied. Experiments were performed at temperatures of 648K and 693K, and at pressures of 10, 20, 30, and 40MPa. Reaction period of 1h was specified for all reactions. Products of reaction were classified into four categories: gas, volatile matter, oil and char. The yields of these four classes of components were determined. The reactions in supercritical water produced mainly both oil and char, while only a small amount of gaseous matter was produced. Regarding the reactions in supercritical methanol and supercritical ethanol, the main products were gaseous matters. The amount of gaseous products increased steeply in condition of high-temperature and high-pressure, while formation of char was inhibited. The main gaseous product was methane in the case of reaction in supercritical methanol and ethane in the case of reaction in supercritical ethanol. From volatile chemicals produced, it was found that PPXG decomposed by parallel reactions of radical decomposition and solvolysis reaction. The yield of char decreased as pressures were raised in the reactions in each of the three supercritical solvents. The total amount of the products of reaction was almost the same as that of the initial amount of PPXG charged to the reactions in supercritical water. On the other hand, concerning reactions in supercritical methanol and supercritical ethanol, the total amount of products of reaction was in excess of the initial amount of PPXG charged in hightemperature and high-pressure conditions. This implies that the methanol or ethanol reacts directly and converted into the reaction products.

収録刊行物

  • 石油学会誌

    石油学会誌 42 (1), 37-44, 1999

    公益社団法人 石油学会

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