摘要
依据气相、固相光催化特性、燃烧源一次、二次可吸入颗粒物PM10的形成机理等研究成果,对应用光催化技术防治燃烧源PM10的可行性及存在问题加以分析;指出在光催化-热催化耦合新技术降解一次PM10的气相有机前体物及PM10中可溶性有机组分SOF、室温光催化氧化二次有机气溶胶SOA及其气相前体物等方面有一定的可行性,但由于存在光催化剂的失活,紫外光强的衰减,废气中SO2、NOx的影响,SOF、SOA降解速率慢及光催化过程主要发生在催化剂表面等原因,目前,欲应用光催化技术有效解决燃烧源PM10的污染问题尚有一定难度。
The prospects and problems with photocatalytic destruction of inhalable particulates PM10 from combustion are analyzed,based on the research progress in gas phase and solid phase photocatalytic reaction,and formation mechanism of primary and secondary PM10.There exist prospects in controlling the primary particulates by catalytic degradation of its gaseous organic precursors and soluble organic fractions(SOF) on particulates with the photocatalysis coupled with thermal catalysis,reducing the formation of secondary organic aerosol(SOA) by photocatalytic oxidation of its precursors and solid-phase photocatalytic degradation of SOA.However,it is still difficult for the photocatalytic technology to effectively control the PM10 emissions at present due to the deactivation of photocatalyst,the depletion of UV photo flux,the effect of SO_2 and NOx,the very slow degradation rate of SOF and SOA,and the fact that photocatalytic process mostly occurrs at the surface of photocatalyst.
出处
《现代化工》
CAS
CSCD
北大核心
2005年第z1期5-8,共4页
Modern Chemical Industry
基金
国家重点基础研究发展规划(973)资助项目(2002CB211604)
