摘要
利用臭氧微气泡/紫外光处理费托合成水,研究臭氧微气泡/紫外光对小分子氧化物脱除过程的影响。首先获得了微气泡的最优粒径分布,再分别对费托合成水及其主要单一组分的水溶液进行氧化处理,并对臭氧微气泡/紫外光体系的氧化效果进行表观动力学分析。结果表明,微气泡可增强气液传质,提高臭氧氧化处理效率,COD降解率随微气泡直径减小呈现先增大后减小的趋势,最佳气泡中位径为25.20μm;在不同紫外光强、氧化体系、反应温度下,臭氧微气泡/紫外光体系氧化费托合成水的COD脱除率均符合准一级反应动力学规律,光强越强、温度越高,反应速率越快;相比单一体系,O_(3)+UV耦合体系氧化反应速率最快,费托合成水氧化反应活化能为4.088 kJ/mol。在氧化过程中,甲醇转化成甲酸,乙醇转化成乙酸,乙酸转化成甲酸,丙酸转化成乙酸和甲酸。紫外灯功率为1 kW时的设备能耗效率最优,处理时间为2 h时,能耗为58.3 W·h/g。
The Fischer-Tropsch(F-T)synthetic water was treated by ozone microbubble/UV light,and the effect of ozone microbubble/UV light on the removal efficiency of small molecule oxides was investigated.Firstly,the optimal particle size distribution of microbubble was found out,then the oxidation of F-T water and its main singlecomponent aqueous solution were treated respectively,and the apparent kinetics of ozone microbubble/UV oxidation system was analyzed.The results showed that the microbubbles could enhance the gas-liquid mass transfer and im⁃prove the oxidation efficiency.The degradation rate of COD increased firstly and then decreased with the micro⁃bubble size decreasing.The optimum bubble diameter was 25.20μm.Under different UV intensity,oxidation system and reaction temperature,the COD removal rate of oxidation of F-T synthesized water by ozone microbubble/UV sys⁃tem conformed to the law of pseudo-first-order reaction kinetics.It showed that the stronger the light intensity and the higher the temperature,the faster the reaction rate.Compared with single system,the reaction rate of O3+UV cou⁃pling system was the fastest.The activation energy of the oxidation reaction in F-T synthesis water was 4.088 kJ/mol.The oxidation process could convert methanol to formic acid,ethanol to acetic acid,acetic acid to formic acid,and propionic acid to acetic acid and formic acid.The energy consumption efficiency of the equipment was the best when the UV lamp power was 1 kW,and the energy consumption is 58.3 W·h/g when the treatment time was 2 h.
作者
贾梦磊
李国强
耿春宇
高琳
JIA Menglei;LI Guoqiang;GENG Chunyu;GAO Lin(Synfuels China Technology Holdings Co.,Ltd.,Beijing 101407,China;Synfuels China Technology(Inner Mongolia)Co.,Ltd.,Ordos 010321,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2023年第2期104-110,共7页
Industrial Water Treatment
基金
鄂尔多斯市科技重大专项项目(2021ZD工46-9)。
关键词
臭氧微气泡
紫外光
氧化
费托合成水
ozone microbubble
ultraviolet light
oxidation
Fischer-Tropsch synthetic water
