摘要
O3/H2O2体系能产生大量自由基,臭氧与自由基的耦合氧化作用能提高苯乙烯的氧化去除效率.采用O3/H2O2氧化高浓度苯乙烯有机废气,研究了臭氧投加量、停留时间、H2O2体积分数、循环液喷淋密度和O3/C8H8摩尔比对苯乙烯去除率的影响.结果表明,O3/H2O2气液两相氧化能高效净化苯乙烯有机废气,苯乙烯去除率可达85.7%.适宜运行条件:停留时间为20.6 s,H2O2体积分数为10%,喷淋密度为1.72 m3·(m2·h)-1,O3/C8H8摩尔比为0.46.采用GC-MS分析O3/H2O2气液两相高级氧化苯乙烯出口气样,研究结果表明苯甲醛(C6H5CHO)和苯甲酸(C6H5COOH)为O3/H2O2氧化苯乙烯的中间产物,并推测出苯乙烯的降解机制.
It can produce a large number of free radicals in O3/H2O2 system, ozone and free radical coupling oxidation can improve the styrene removal efficiency. Styrene oxidation by 03/H2O2 was investigated. Ozone dosage, residence time, H202 volume fraction, spray density and molar ratio of O3/C8H8 on styrene removal were evaluated. The experimental results showed that styrene removal efficiency achieved 85.7%. The optimal residence time, H202 volume fraction, spray density and O3/C8H8 molar ratio were 20. 6 s, 10% , 1.72 m3. （m2. h） -l and 0.46, respectively. The gas-phase degradation intermediate products were benzaldehyde（ CrH5 CHO ） and benzoic acid（ C6 H5 COOH） , which were identified by means of gas chromatography-mass spectrometry（GC-MS）. The degradation mechanism of styrene is oresented.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2013年第10期3772-3776,共5页
Environmental Science
基金
国家科技部科技型中小企业技术创新基金项目(11C2621441321)
广州市科技计划项目(2010Z2-C361)
海珠区科技计划项目(2011-C-22)
