Gas/Aerosol Distribution of Formic and Acetic Acids |
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| Authors: | Zhaoyue Meng John H Seinfeld Pradeep Saxena |
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| Affiliation: | 1. Department of Environmental Engineering Science (Z.M.) , California Institute of Technology , Pasadena, CA, 91125;2. Department of Chemical Engineering (J.H.S.) , California Institute of Technology , Pasadena, CA, 91125;3. Electric Power Research Institute , 3412 Hillview Avenue, Palo Alto, CA, 94303 |
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| Abstract: | Data and correlations for evaluating the gas/aerosol equilibrium of formic and acetic acids are developed. The species considered include HCOOH(g), CH3COOH(g), HCOOH(aq), CH3COOH(aq), HCOO?, CH3COO?, HCOONa(s), CH3COONa(s), HCOOK(s), (HCOO)2Ca(s), and (CH3COO)2Ca(s). Based on available thermodynamic data, we show that the gas /aerosol distribution of formic and acetic acids is strongly on the gas-phase side for typical sulfate/ nitrate / ammonium / sodium / chloride / water aerosols and that dissolved formate and acetate have negligible effect on the gas/aerosol equilibrium of the other components. |
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