摘要
利用自行建立的管式平推流反应装置 ,对含苯酚或含硝基苯的不同废水的超临界水氧化反应进行了研究。考察了温度、停留时间对二者氧化效率的影响 ,实验结果表明 ,硝基苯比苯酚要稳定得多 ,此外还对苯酚进行了反应动力学研究 ,得到了苯酚消失速率方程 ,并与文献报导结果进行了比较。
A plug flow reactor was established for supercritical water oxidation. Dilute aqueous solutions of the phenol or nitrobenzene were oxidized at temperatures between 400 and 500℃ at 25.0MPa. Reactor residence times ranged from 1.8 to 18 seconds. The effects of reaction temperature and resident time on the efficiencies of destroying the organic compounds were studied. The comparison between the experimental results of phenol and nitrobenzene solutions showed that the latter was much harder to be oxidized under the similar conditions in supercritical water, since its chemical structure is much more stable. A global rate law for phenol disappearance kinetics valid between 400~500℃ at 25MPa was also determined as follows, -r=1.12×10 4 exp (-6.11×10 4/RT)c 1.07 . [WT5HZ]
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2000年第3期301-304,共4页
Chemical Reaction Engineering and Technology
基金
中国石油化工集团公司基础基金!资助项目 (X5960 0 6)
浙江大学曹光彪高科技发展基金
