正负电晕放电改性白松木表面形貌和润湿特性

为了探明放电活性粒子改性木材表面形貌和润湿特性及其机理,采用针-板电极产生正电晕和负电晕改性白松木表面,然后通过扫描电子显微镜、接触角测量仪、拉曼光谱仪和红外光谱仪分别获取参数,最后分析了放电处理后的白松木表面形貌、润湿特性和化学组成变化情况.研究表明,增加放电电压和作用时间,白松木表面的粗糙度和润湿性随之增加,纤维素...     

湖北省铁水联运发展现状及对策研究

在对湖北省铁水联运现状概况进行深入调研和总结的基础上,分析湖北省铁水联运目前存在的主要问题,包括铁水联运相关职能部门分工不明确、铁路铁水联运专用线发展滞后、铁水集疏运设施布局不合理等,提出铁水联运节点统筹规划、疏通全省铁水联运物流大通道、加快建设铁水联运信息平台、打造铁水联运标准化工程等针对湖北省铁水联运发展现状与问题的发展对策和建设思路。     

Regulation characteristics of oxide generation and formaldehyde removal by using volume DBD reactor

Discharge plasmas in air can be accompanied by ultraviolet(UV) radiation and electron impact,which can produce large numbers of reactive species such as hydroxyl radical(OH·),oxygen radical(O·),ozone(O3),and nitrogen oxides(NOx),etc.The composition and dosage of reactive species usually play an important role in the case of volatile organic compounds(VOCs) treatment with the discharge plasmas.In this paper,we propose a volume discharge setup used to purify formaldehyde in air,which is configured by a plate-to-plate dielectric barrier discharge(DBD) channel and excited by an AC high voltage source.The results show that the relative spectral-intensity from DBD cell without formaldehyde is stronger than the case with formaldehyde.The energy efficiency ratios(EERs) of both oxides yield and formaldehyde removal can be regulated by the gas flow velocity in DBD channel,and the most desirable processing effect is the gas flow velocity within the range from2.50 to 3.33 m s-1.Moreover,the EERs of both the generated dosages of oxides(O3 and NO2) and the amount of removed formaldehyde can also be regulated by both of the applied voltage and power density loaded on the DBD cell.Additionally,the EERs of both oxides generation and formaldehyde removal present as a function of normal distribution with increasing the applied power density,and the peak of the function is appeared in the range from 273.5 to 400.0 W l-1.This work clearly demonstrates the regulation characteristic of both the formaldehyde removal and oxides yield by using volume DBD,and it is helpful in the applications of VOCs removal by using discharge plasma.