高校化学工程学报2001，Vol.15Issue(1)：66-70,5.
苯胺在超临界水中氧化反应动力学的研究
Kinetics of Aniline Oxidation in Supercritical Water
摘要
Abstract
Water under supercritical conditions (T>374.2℃, P>22MPa) is an attractive medium for the efficient oxidation of wastes. Oxidation of aniline in supercritical water was studied at 673.15K~948.15K , 25MPa and 300% excess oxygen in an isothermal, isobaric, tubular flow reactor. The experimental results showed that increasing the temperature and resident time could increase the aniline removal efficiency and COD removal efficiency. The aniline removal efficiency could be achieved 93% in 30 seconds at the conditions of 2.351×10-4mol·L-1 aniline, 748.15K, 25.0MPa and 300% excess oxygen. But only when the temperature is higher than 923.15K with other conditions unchanged, can the COD removal efficiency be achieved greater than 90%. In the temperature range 873.15K~898.15K, the COD removal efficiency is strongly temperature dependent. At the conditions of 673.15K~748.15K, 25.0MPa and 300% excess oxygen, the global kinetics for aniline disappearance could be described as follows:
in which the reaction order respect to aniline is 1.554, the activation energy is 2.96′104J×mol-1, and the Arrhenius pre-exponential factor is 6.69×103.关键词
苯胺/超临界水氧化/去除率/COD/反应动力学分类
化学化工引用本文复制引用
丁军委,陈丰秋,吴素芳,戎顺熙..苯胺在超临界水中氧化反应动力学的研究[J].高校化学工程学报,2001,15(1):66-70,5.
