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利用自建的一套连续式装置,在高于水的临界点的温度和压力(673~873K,26~35MPa)下,以氧气为氧化剂对苯酚溶液进行氧化处理,对苯酚的超临界水氧化进行了试验研究。结果表明,在氧气过量的条件下,停留时间是影响苯酚在超临界水中氧化分解的主要因素。提高反应温度和压力能增加苯酚的去除率,只要有足够的氧气,增加苯酚初始浓度对苯酚转化率的影响就不明显。在试验条件下,溶液中苯酚的去除动力学对苯酚是一级,对氧气是零级。
A series of continuous self-built devices were used to oxidize the phenol solution with oxygen as the oxidizing agent under the temperature and pressure higher than the critical point of water (673-873K, 26-35MPa) to oxidize phenol in supercritical water Conducted a pilot study. The results showed that the residence time was the main factor that affected the oxidative decomposition of phenol in supercritical water under the conditions of excess oxygen. Increasing the reaction temperature and pressure can increase the removal rate of phenol. As long as there is enough oxygen, the effect of increasing the initial concentration of phenol on the conversion of phenol is not obvious. Under the experimental conditions, the removal kinetics of phenol in solution is one order of magnitude for phenol and zero order for oxygen.