非均相催化湿式氧化技术处理4-氯酚

Studies of Catalytic Wet Air Oxidation for 4-Cholrophenol Wastewater Catalyzed by Ferric Ion Supported on Activated Carbon

研究了以负载于活性炭上的三氯化铁为催化剂,以氧气为氧化剂的非均相催化湿式氧化体系处理4-氯酚废水工艺.通过正交实验方法,从反应温度、时间、压力、催化剂用量等方面初步考察了4-氯酚在该体系中的氧化效果.在150℃,0.5 MPa氧气,催化剂用量为30%(摩尔分数),反应4 h,对降解过程所得的中间产物和终产物进行了分析.结果表明,该体系对4-氯酚的去除率能够达到67%,CODCr降低了39%.并且初步探索了将亚硝酸钠加入到三氯化铁/活性炭催化氧化体系后形成的共催化氧化体系中4-氯酚的降解效果,发现亚硝酸钠的加入对4-氯酚的去除有很大的促进作用.

The FeCl3 supported on activated carbon was used as catalyst and oxygen as oxidant to form a heterogeneous catalytic wet oxidative system forthe treatment of 4-cholrophenol wastewater. By orthogonal experiments, the oxidation effect of 4-cholrophenol in the system was preliminarily investigated from the aspects of temperature, oxygen pressure, reactive time and amount of FeCl3/C. With 30% FeCl3/C, under 0.5 MPa of 02 and at 150 ℃, the intermediate products and final products in the degradation process were analyzed. The results showed that 67% 4-chlomphenol was destroyed with 39% CODCr reduction after 4 h. It was found that the introduction of NANO2 as the cocatalyst in the oxidative degradation systems brought about effective improvement on overall catalytic activity for the removal of 4-chlorophenol.