Oxidation of 2,4-dichlorophenol in supercritical water
Oxidation of 2,4-dichlorophenol in supercritical water
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DOI：
10.1016/s0045-6535(97)10092-3
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发表时间：
1998-04
期刊：
影响因子：
8.8
通讯作者：
Kuen-Song Lin;H. -. Wang;M. C. Li
中科院分区：
文献类型：
--
作者：
Kuen-Song Lin;H. -. Wang;M. C. Li
研究了2，4-二氯苯酚（DCP）在超临界水中氧化的消失动力学。实验数据表明，DCP的反应级数为0.97，氧气的反应级数为1.16。反应的活化能为13.6 kcal/mol，阿氏指数前常数为72.9 M−1.13s−1。测定了DCP在673 K下超临界水氧化（SCWO）过程中的缩合副产物三氯苯酚和二苯并对二恶英的含量。我们还发现，实验中的钠或铁阳离子的存在下，在超临界水氧化DCP抑制缩合副产物的形成速率，提高反应转化率。
Disappearance kkinetics of 2,4-dichlorophenol (DCP) oxidation in supercritical water was investigated. The experimental data reveal that the reaction is 0.97 order for DCP and 1.16 order for oxygen. The activation energy and the Arrhenius pre-exponential constant are 13.6 kcal/mol and 72.9 M−1.13s−1, respectively. Several condensation by-products, such as trichlorophenols and dibenzo-p-dioxin, from supercritical water oxidation (SCWO) of DCP at 673 K were determined. We also found experimentally that the presence of sodium or iron cations in oxidation of DCP in supercritical water suppressed the formation rate of condensation by-products and enhanced the reaction conversion.