공업화학, 촉매/반응공학 : 아임계 및 초임계수하의 p-Xylene 의 무촉매 부분 산화반응에서 반응조건이 Terephthalic acid 의 선택성에 미치는 영향 = Industrial Chemistry, Catalysis/Reaction Engineering : Effects of Reaction Conditions on Selectivity of Terephthalic acid in Uncatalyzed Partial Oxidation of p-Xylene under Subcritical and Supercritical Water

다국어 초록 (Multilingual Abstract)

The possibility of manufacturing the terephthalic acid(TPA) by partial oxidation of p-xylene without a catalyst in subcritical and supercritical water medium was investigated experimentally. The effects of reaction condition such as reaction temperature, pressure and hydrogen peroxide feed ratio on the conversion of p-xylene and the selectivity of TPA produced were investigated in batch reactor and new oxidation reaction pathway of p-xylene was proposed. Conversion of p-xylene was about 89.0% in subcritical condition and increased with the temperature increasing, over 99.0% in supercritical condition after 20 minutes from the start of reaction. The selectivity of TPA in subcritical conditions was higher than in supercritical conditions and the maximum value was 29.0% at 300 ℃, 220 bar, 50% H_2O_2 feed ratio. The pressure effect on TPA selectivity was higher at subcritical water condition than at the supercritical condition.