【摘要】 低温等离子体是一种能有效降解挥发性有机化合物(VOCs)的新技术。在降解过程中,由于有机气体分子结构的不同,降解效率出现差异。为了研究分子结构对低温等离子体降解VOCs的影响,以苯、甲苯、二甲苯、戊烷、正己烷和环己烷6种VOCs作为实验对象,分析比较了电离能、氢含量和沸点对闭环芳香烃和开链烷烃降解的影响。实验结果表明:1)电离能是影响芳烃和烷烃2类VOCs降解效率的重要参数,电离能越大,降解效率越低; 2)氢含量由于受到单键数量的影响,对于芳香烃,氢含量越大,降解效率越高,而对烷烃来说则相反; 3)沸点也是影响这2类VOCs降解的一个相关因素,随着沸点增大,其降解效率也增大。更多还原

【Abstract】 Non-thermal plasma( NTP) is a novel technology that can effectively decompose volatile organic compounds( VOCs). In the process of VOCs decomposition by NTP,the decomposition efficiency of VOCs will become different due to their different molecule structures. For unfolding the effect of molecular structure on the VOCs decomposition,six VOCs including benzene,toluene,xylene,pentane,n-hexane and cyclohexane were selected as the experimental objects,and the influence of ionization energy, hydrogen content and boiling point on the decomposition of the closed-loop aromatic hydrocarbons and the open-chain alkanes was analyzed and compared. The experimental results indicated that ionization energy was an important parameter affecting the decomposition efficiency of these two types of VOCs,and the larger the ionization energy was,the lower the degradation efficiency would be. The hydrogen content had different rules in the two types of VOCs due to the influence of single bond number: for aromatic hydrocarbons,the higher the hydrogen content was,the higher decomposition efficiency would be,while the situation for alkane was just on the opposite. The boiling point was also a relevant factor affecting decomposition of VOCs,and for aromatic hydrocarbons or alkanes,the decomposition efficiency increased as the boiling point increased.更多还原