摘要
研究了真空紫外光催化(TiO2/VUV)对低浓度甲烷的去除效果及影响因素.结果表明,该法的去除速率随甲烷进口浓度、流量、相对湿度(RH)的增加而达到一个最大值,去除效果明显高于单独真空紫外(VUV).尾气中臭氧不随甲烷进口浓度的变化而变化,但随RH和流量的增加而降低.添加H2O2和NOx不利于甲烷的降解,但显著地降低了臭氧的浓度.降解过程中甲醛的产率小于0.5%,并随RH增大而下降.
The photocatalytic degradation of low level methane by vacuum ultraviolet （TiO2/VUV） was investigated. The removal rate of methane by TiO2/VUV first increased and reached a maximum with increase of initial methane concentration, flux, relative humidity＇ （RH） and then kept constant, the outlet ozone concentration hardly changed with initial methane concentration, and it decreased with increase of RH and flux. Addition of H2O2 and NOx was not favorable for the methane removal, but significantly reduced the outlet ozone concentration. Formaldehyde formed as an intermediate when methane degraded by TiO2/VUV, its yield was less than 0.5% and decreased with increase of RH. The removal effect of TiO2/VUV on methane was much higher than vacuum ultraviolet （VUV）.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2006年第6期653-656,共4页
China Environmental Science
基金
新世纪优秀人才支持计划(NCET-04-0090)
关键词
真空紫外光
光催化
甲烷
室内空气
vacuum ultraviolet
photocatalysis
methane
indoor air
