| 硝酸铵气溶胶挥发动力学 |
| 摘要点击 1545 全文点击 2337 投稿时间：1998-03-02 |
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| 中文关键词 NH4NO3气溶胶 挥发动力学 表观速率常数 表观活化能 |
| 英文关键词 NH4NO3 aerosols evaporation kinetics apparent rate constant apparent activation energy |
| DOI 10.13227/j.hjkx.19990122 |
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| 中文摘要 |
| 研究了单分散NH4NO3干气溶胶在流动反应器内的挥发动力学。结果表明,挥发反应符合零级反应,凝聚反应符合二级反应。NH4NO3气溶胶计算粒径为0.65μm,计算数浓度为80-120个/cm3时,挥发和凝聚反应的表观活化能分别为281.79kJ/mol和97.54kJ/mol,表观速率常数的指数前因子分别为6.81×1047μl·m-3·min-1(ppbv·min-1)和1.13×1014μl-1·m3·min-1(ppbv-1·min-1).说明NH4NO3气溶胶的挥发受化学反应控制。 |
| 英文摘要 |
| The kinetics of evaporation of monodisperse dry NH4NO3 aerosols generated by aerosol generator was studied in a flow reactor.The results showed that the evaporation obeys zero order reaction and the condensation second order reaction.For NH4NO3 aerosols with calculated particle radius 0.65μm and calculated number concentration ranging from 80 to 120cm-3,the apparent activation energies of these reactions are 281.79kJ/mol and 97.54kJ/mol respectively and the exponential factors of apparent velocity constants are 6.81×1047 ppbv·min-1 (μl·m-3 ·min-1) and 1.13×1014 ppbv-1 ·min-1 (μl-1 ·m3·min-1)respectively.Therefore,the evaporation of NH4NO3 aerosols is controlled by chemical reaction. |
