A numerical simulation of kinetic constraint on evaporation of ammonium nitrate in diffusion denuder  

作　　者：Shen Ji Research Center for Eco Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China 

出　　处：《Journal of Environmental Sciences》1998年第1期115-123,共9页环境科学学报（英文版）

摘　　要：A numerical simulation model has been developed to investigate the diffusion and reaction in diffusion denuder for reactive gases and aerosols. The analytical equation for equilibrium and kinetic equations of NH 4NO 3, NH 3 and HNO 3 system were presented. The model results of sampling efficiencies were agree with those calculated by Gormley Kennedy equation and other models. The evaporation of NH 4NO 3 aerosol has a kinetic constraint. The kinetic constant can be estimated from evaporation data. The model results showed that an annular denuder can separate reactive gases and aerosols.A numerical simulation model has been developed to investigate the diffusion and reaction in diffusion denuder for reactive gases and aerosols. The analytical equation for equilibrium and kinetic equations of NH 4NO 3, NH 3 and HNO 3 system were presented. The model results of sampling efficiencies were agree with those calculated by Gormley Kennedy equation and other models. The evaporation of NH 4NO 3 aerosol has a kinetic constraint. The kinetic constant can be estimated from evaporation data. The model results showed that an annular denuder can separate reactive gases and aerosols.

关 键 词：kinetic constraint ammonium nitrate diffusion denuder. 

分 类 号：X13[环境科学与工程—环境科学]