摘要
利用水槽试验对苯的挥发特性进行研究,在此基础上,通过数值计算探求苯在挥发过程中热力学因素焓的变化规律.结果表明,焓变的时空变化与浓度的时空变化密切相关.随挥发时间的增加,苯浓度下降,焓变的数值也越来越小;随水流下移,苯浓度峰值下移,焓变峰值的位置也不断下移;随着铅垂高度Y的增加,苯的扩散速度增大,焓变值不断减小;而在同一时刻,在宽度Z方向,焓变的数值曲线都呈阶梯性变化.
In this paper,the volatile characteristics of benzene were studied using flume experiment.Based on numerical calculation,the laws of a thermodynamic factor,the enthalpy variation,were explored.The results showed that there were good correlations between the enthalpy and the concentration variations with time and location.The concentration of benzene decreased with time,and the enthalpy variation became smaller.The locations of peak values of both concentration and enthalpy variations moved downword.With increasing vertical height Y,the diffusion rate of benzene increased,but the enthalpy variation decreased.At the same time,all the curves of enthalpy variation were step types at width of Z.
出处
《环境化学》
CAS
CSCD
北大核心
2013年第6期1062-1066,共5页
Environmental Chemistry
基金
国家自然科学基金(51109106)
江苏省高校自然科学基金项目(11KJB570001)
江苏省高校自然科学研究重大项目(12KJA610001)资助
关键词
苯
挥发
热力学
焓变
水槽试验
benzene
volatilization
thermodynamics
enthalpy Variation
flume experiment
