纳秒脉冲均匀放电等离子体与催化协同脱除甲醛中OH等自由基诊断研究

项目名称： 纳秒脉冲均匀放电等离子体与催化协同脱除甲醛中OH等自由基诊断研究

项目编号： No.51207017

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电气科学与工程学科

项目作者： 贾莉

作者单位： 大连理工大学

项目金额： 26万元

中文摘要： 甲醛是可挥发性有机化合物(VOCs)中典型的空气污染物，严重危害人们身体健康。脱除率低、能耗大、二次污染等是目前各种脱除甲醛方法中的难点问题。等离子体与催化结合低温脱除甲醛是一种很有前途的新技术。在等离子体与催化脱除甲醛过程中，OH、HO2和O等自由基对脱除甲醛分子具有重要作用。本项目中我们拟采用快速ICCD摄像、发射光谱、激光诱导荧光光谱以及电压、电流测试等技术相结合对大气压纳秒脉冲均匀放电等离子体与催化剂协同效应脱除甲醛中的OH、HO2和O等自由基及各种活性物种进行诊断研究，重点研究放电参数、催化剂组成和水蒸气、氧气含量等对产生OH、HO2和O等自由基及各种活性物种浓度与甲醛脱除率之间的影响规律。通过与理论分析、数值模拟比较，深入研究OH、HO2和O等自由基及各种活性物种在等离子体与催化协同效应中与甲醛作用的微观机理。为实现低能耗、高脱除率和无二次污染脱除甲醛气体奠定科学与技术基础。

中文关键词： 等离子体；纳秒脉冲；介质阻挡放电；大气压；甲醛

英文摘要： As a typical air pollutant among volatile organic compounds (VOCs), formaldehyde has damaged seriously the human health . Presently, several difficulties, e. g. low removal efficiency, high energy consumption, and secondary pollution, etc. have been become the main problems in formaldehyde removal. Collaborative removal of formaldehyde by plasma and catalysis at low temperature is a new technique with wide application prospects. In the process, the radicals such as OH, HO2 and O play an important role in removing the formaldehyde molecules. In this project, the detection technologies of fast camera by ICCD, optical emission spectra, laser-induced florescence spectra, discharge voltage, and discharge current etc. are combined to diagnose and investigate the radicals OH, HO2, and O and the active species produced in the process of collaborative removal of formaldehyde by nanosecond pulse homogenous discharge plasma and catalyst at atmospheric pressure. The effects of discharge parameter, catalyst composition, the concentration of water vapor and oxygen on the formaldehyde removal efficiency and the concentration of radicals OH, HO2, and O etc. would be strongly focused on. Compared with theoretic analysis and numerical simulation, micro-mechanism of interaction between formaldehyde and radicals OH, HO2 and O in th

英文关键词： Plasma；Nanosecond Pulse；Dielectric Barrier Discharge；Atmospheric Pressure；Formaldehyde