Decomposition of ethylenediaminetetraacetic acid by supercritical water oxidation

被引：28
作者：
Lee, HC
In, JH
Hwang, KY
Lee, CH [1 ]
机构：
[1] Yonsei Univ, Dept Chem Engn, Seoul 120749, South Korea
[2] KIST, Water Environm & Remediat Res Ctr, Seoul 136791, South Korea
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2004年 / 43卷 / 13期
关键词：
D O I：
10.1021/ie049952u
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Ethylenediaminetetraacetic acid (EDTA) was decomposed by supercritical water oxidation (SCWO) in a tubular plug-flow reactor. The effect of the oxidant amount on the decomposition rate and efficiency was more significant at lower temperature. Also, excess oxidant played a key role in decreasing the activation energy for EDTA decomposition as CODCr. The nitrogen from EDTA was found to transform into NO3--N by thermal decomposition, while a portion of the nitrogen of EDTA and NO3--N was transformed into NH4+-N and finally converted to N-2 gas in the SCWO process. The decomposition kinetics of EDTA as CODCr in the SCWO process was described by a global rate expression.
引用
收藏
页码：3223 / 3227
页数：5
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