發(fā)布時(shí)間：2018-05-16 09:57

  本文選題：濕式催化氧化 + 喹啉��； 參考：《浙江海洋大學(xué)》2017年碩士論文

【摘要】：濕式氧化法因其適用范圍廣、處理效率高、降解徹底且無(wú)二次污染等特點(diǎn),現(xiàn)在已經(jīng)廣泛應(yīng)用于難降解工業(yè)廢水的處理。盡管該法處理效果較好,但在實(shí)際應(yīng)用中也受到諸多限制,例如反應(yīng)需要在高溫高壓的條件下進(jìn)行,對(duì)設(shè)備材質(zhì)要求苛刻,處理成本高。針對(duì)此類問(wèn)題,本論文采用新型催化劑鈦硅分子篩,用喹啉模擬高氮石油廢水,在低壓中溫的條件下進(jìn)行濕式氧化反應(yīng),得出了最佳工藝條件及催化劑再生條件,并對(duì)反應(yīng)動(dòng)力學(xué)進(jìn)行了探究,得到動(dòng)力學(xué)模型,最后對(duì)濕式催化氧化處理廢水進(jìn)行了工藝設(shè)計(jì)及經(jīng)濟(jì)估算。采用單因素實(shí)驗(yàn)法研究表明,在溫度150℃,初始pH為7,H2O2投加量為20ml/L,催化劑投加量為4g/L的最佳工藝條件下,反應(yīng)60 min喹啉轉(zhuǎn)化率為97%,COD去除率為85%,喹啉模擬石油廢水可通過(guò)濕式催化法有效地去除。對(duì)失活催化劑進(jìn)行XRD、BET分析,結(jié)果表明失活催化劑并未發(fā)生骨架坍塌,仍具有完整的骨架結(jié)構(gòu),其失活原因是有機(jī)物堵塞了分子篩的孔道。失活催化劑經(jīng)550℃高溫培燒后,其比表面積、孔比表面積和孔容均能恢復(fù)到新鮮催化劑水平,催化劑的重復(fù)利用性能優(yōu)異。分析動(dòng)力學(xué)模型,得知影響反應(yīng)速率的最大因素是H2O2的投加量,初始pH值對(duì)于反應(yīng)速率的影響最弱。論文最后對(duì)濕式氧化處理石油廢水進(jìn)行了工藝設(shè)計(jì)與經(jīng)濟(jì)估算,結(jié)果表明,濕式催化氧化運(yùn)行成本為21.5元/m3,該工藝具有良好的經(jīng)濟(jì)效益。
[Abstract]:Because of its wide range of application, high efficiency, complete degradation and no secondary pollution, wet oxidation has been widely used in the treatment of refractory industrial wastewater. Although the effect of this method is good, it is also limited in practical application, for example, the reaction needs to be carried out under the condition of high temperature and high pressure, the material requirement of the equipment is strict, and the treatment cost is high. In order to solve this problem, a new catalyst, titanium-silicon molecular sieve, was used to simulate high-nitrogen petroleum wastewater in this paper. The wet air oxidation reaction was carried out at low pressure and medium temperature, and the optimum conditions for catalyst regeneration were obtained. The reaction kinetics was studied and the kinetic model was obtained. Finally, the process design and economic estimation of wet catalytic oxidation for wastewater treatment were carried out. The results of single factor experiment showed that under the optimum conditions of temperature 150 鈩，

本文編號(hào)：1896402