本文選題：臭氧催化氧化　切入點(diǎn)：COD　出處：《浙江海洋大學(xué)》2017年碩士論文

【摘要】：海洋石油具有高酸高氮特點(diǎn),在石油在開采加工過(guò)程中產(chǎn)生的石油廢水組成復(fù)雜,還有較多的含氮、含氧復(fù)雜有機(jī)物,廢水處理難度大。本文分別用苯酚、喹啉模擬高含氧、高含氮石油廢水,研究了基于HTS鈦硅分子篩的臭氧催化氧化處理廢水工藝,考察了催化劑的重復(fù)使用性能和再生性能,對(duì)臭氧催化氧化降解動(dòng)力學(xué)進(jìn)行了分析;對(duì)催化劑進(jìn)行了XRD、IR、BET、TG等表征,分析了催化劑的失活機(jī)理,并對(duì)此工藝進(jìn)行了經(jīng)濟(jì)分析。研究結(jié)果表明,在pH為8,溫度為40℃,HTS鈦硅分子篩催化劑的投加量為2.8g/L,持續(xù)通入臭氧25min,對(duì)苯酚模擬廢水和喹啉模擬廢水的COD去除率分別為93.5%和84.3%。弱堿性條件下有利于羥基自由基的產(chǎn)生,對(duì)臭氧催化氧化工藝有促進(jìn)作用。HTS鈦硅分子篩催化劑在苯酚模擬廢水中利用5次失去活性,喹啉模擬廢水重復(fù)利用6次失去活性。對(duì)比新鮮催化劑和使用后的催化劑表征數(shù)據(jù),得知催化劑的基本結(jié)構(gòu)沒有發(fā)生變化,催化劑失去活性是由于孔隙堵塞。對(duì)重復(fù)利用的催化劑在550℃煅燒處理,發(fā)現(xiàn)催化劑又重新恢復(fù)活性。通過(guò)對(duì)實(shí)驗(yàn)數(shù)據(jù)的分析,認(rèn)為基于HTS鈦硅分子篩的臭氧催化氧化降解苯酚、喹啉模擬廢水符合擬一級(jí)動(dòng)力學(xué)。得出溫度對(duì)反應(yīng)速率的影響最大,其次是催化劑的添加量。最后對(duì)處理工藝進(jìn)行經(jīng)濟(jì)估算得出臭氧催化氧化處理模擬廢水,達(dá)到排放標(biāo)準(zhǔn)的成本為7.37元/噸。
[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，

本文編號(hào)：1699689