臭氧催化氧化法处理高氮模拟石油废水研究

发布时间：2018-04-02 09:05

  本文选题：臭氧催化氧化　切入点：COD　出处：《浙江海洋大学》2017年硕士论文

【摘要】：海洋石油具有高酸高氮特点,在石油在开采加工过程中产生的石油废水组成复杂,还有较多的含氮、含氧复杂有机物,废水处理难度大。本文分别用苯酚、喹啉模拟高含氧、高含氮石油废水,研究了基于HTS钛硅分子筛的臭氧催化氧化处理废水工艺,考察了催化剂的重复使用性能和再生性能,对臭氧催化氧化降解动力学进行了分析;对催化剂进行了XRD、IR、BET、TG等表征,分析了催化剂的失活机理,并对此工艺进行了经济分析。研究结果表明,在pH为8,温度为40℃,HTS钛硅分子筛催化剂的投加量为2.8g/L,持续通入臭氧25min,对苯酚模拟废水和喹啉模拟废水的COD去除率分别为93.5%和84.3%。弱碱性条件下有利于羟基自由基的产生,对臭氧催化氧化工艺有促进作用。HTS钛硅分子筛催化剂在苯酚模拟废水中利用5次失去活性,喹啉模拟废水重复利用6次失去活性。对比新鲜催化剂和使用后的催化剂表征数据,得知催化剂的基本结构没有发生变化,催化剂失去活性是由于孔隙堵塞。对重复利用的催化剂在550℃煅烧处理,发现催化剂又重新恢复活性。通过对实验数据的分析,认为基于HTS钛硅分子筛的臭氧催化氧化降解苯酚、喹啉模拟废水符合拟一级动力学。得出温度对反应速率的影响最大,其次是催化剂的添加量。最后对处理工艺进行经济估算得出臭氧催化氧化处理模拟废水,达到排放标准的成本为7.37元/吨。
[Abstract]:Offshore oil has the characteristics of high acid and high nitrogen, the composition of petroleum wastewater produced in the process of oil extraction and processing is complex, there are more nitrogen, complex organic matter containing oxygen, and it is difficult to treat the wastewater. In this paper, phenol and quinoline are used to simulate the high oxygen content, respectively. The ozone catalytic oxidation process based on HTS titanium-silicon molecular sieve was studied for the treatment of high nitrogen petroleum wastewater. The reusability and regeneration performance of the catalyst were investigated and the kinetics of ozone catalytic oxidation degradation was analyzed. The catalyst was characterized by XRDX IR and BETTG, the deactivation mechanism of the catalyst was analyzed, and the process was analyzed economically. The COD removal rates of phenol simulated wastewater and quinoline simulated wastewater were 93.5% and 84.3%, respectively, at pH 8 and 40 鈩，

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