摘要
研究了以超临界水氧化法 (SCWO)处理乙醇废水的工艺过程 .实验表明 ,一氧化碳和二氧化碳分别是反应中间产物和最终产物 .5 5 0℃、2 5MPa、停留时间大于 15s时 ,SCWO能将乙醇完全氧化为二氧化碳 ,达到彻底处理的目的 .随停留时间增大、温度升高 ,乙醇的去除率增大 。
As the typical representation of alcohols wastewater ethanol was selected and its oxidation in supercritical water was investigated.The experiments were performed in an isothermal,plug flow reactor at temperatures from 475 to 550℃,pressures from 22 to 30?MPa,reactor residence times from 0 6 to 98 3?s,and oxygen/ethanol molar feed ratios from 4 56 to 9 09.The oxidation of ethanol was fast in supercritical water.At temperature of 550℃,pressure of 25?MPa and residence time of more than 15?s,the reaction conversion of ethanol to carbon dioxide was near 100 percent.Carbon monoxide was the major intermediate of the process.The ethanol conversion increased with increasing residence time and temperature and did not obviously change with varying pressure or oxygen concentration.
出处
《环境科学学报》
CAS
CSCD
北大核心
2002年第1期17-20,共4页
Acta Scientiae Circumstantiae
