%0 Journal Article
%T Hydrothermal decomposition of pentachlorophenol in subcritical and supercritical water with sodium hydroxide addition
%A PRABOWO Benedictus
%A VERIANSYAH Bambang
%A KIM Jae-Duck
%A <br>PRABOWO Benedictus
%A VERIANSYAH Bambang
%A KIM Jae-Duck
%J 环境科学学报(英文版)
%D 2007
%I 
%X Hydrothermal decomposition of pentachlorophenol (PCP), (C6HCl5O), as the probable human carcinogen, was investigated in a tubular reactor under subcritical and supercritical water with sodium hydroxide (NaOH) addition. The experiments were conducted at a temperature of 300-420℃ and a fixed pressure of 25 MPa, with a residence time that ranged from 10 s to 70 s. Under the reaction conditions, the initial PCP concentrations were varied from 0.25 to 1.39 mmol/L and the NaOH concentrations were varied from 2.5 to 25 times of the concentrations of PCP. The result of this study showed that PCP conversion in supercritical water is highly dependent on the reaction temperature, residence times, and NaOH concentration. PCP conversion in subcritical water is, however, only dependent on reaction temperature. NaOH concentration and residence times were found to have little effect on PCP conversion in subcritical condition. It was found that NaOH concentration affected the dechlorinations of PCP in the supercritical water. The intermediates detected products were proposed to be tetrachlorophenol and trichlorophenol, respectively.
%K pentachlorophenol
%K hydrothermal decomposition
%K supercritical water
%K subcritical water
%K addition
%K sodium hydroxide
%K supercritical water
%K subcritical water
%K pentachlorophenol
%K decomposition
%K intermediates
%K products
%K little
%K effect
%K conditions
%K however
%K concentrations
%K residence time
%K result
%K study
%K conversion
%K dependent
%K reaction temperature
%K times<br>亚临界水
%K 超临界水
%K NaOH添加
%K 五氯苯酚
%K 水热分解作用
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=CCA380B04FEA453353214BFAE257093D&yid=A732AF04DDA03BB3&vid=2A8D03AD8076A2E3&iid=B31275AF3241DB2D&sid=46FF101E7ECF9F15&eid=1C3BB0F444F5E427&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=1&reference_num=15