Comparisons between Hygroscopic Measurements and UNIFAC Model Predictions for Dicarboxylic Organic Aerosol Mixtures
Hygroscopic behavior was measured at 12°C over aqueous bulk solutions containing dicarboxylic acids, using a Baratron pressure transducer. Our experimental measurements of water activity for malonic acid solutions (0–10 mol/kg water) and glutaric acid solutions (0–5 mol/kg water) agreed to within 0....
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Wiley
2013-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2013/897170 |
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| author | Jae Young Lee Lynn M. Hildemann |
| author_facet | Jae Young Lee Lynn M. Hildemann |
| author_sort | Jae Young Lee |
| collection | DOAJ |
| description | Hygroscopic behavior was measured at 12°C over aqueous bulk solutions containing dicarboxylic acids, using a Baratron pressure transducer. Our experimental measurements of water activity for malonic acid solutions (0–10 mol/kg water) and glutaric acid solutions (0–5 mol/kg water) agreed to within 0.6% and 0.8% of the predictions using Peng’s modified UNIFAC model, respectively (except for the 10 mol/kg water value, which differed by 2%). However, for solutions containing mixtures of malonic/glutaric acids, malonic/succinic acids, and glutaric/succinic acids, the disagreements between the measurements and predictions using the ZSR model or Peng’s modified UNIFAC model are higher than those for the single-component cases. Measurements of the overall water vapor pressure for 50 : 50 molar mixtures of malonic/glutaric acids closely followed that for malonic acid alone. For mixtures of malonic/succinic acids and glutaric/succinic acids, the influence of a constant concentration of succinic acid on water uptake became more significant as the concentration of malonic acid or glutaric acid was increased. |
| format | Article |
| id | doaj-art-c5b32698df514c81a25ad31179400e02 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
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| series | Advances in Meteorology |
| spelling | doaj-art-c5b32698df514c81a25ad31179400e022025-02-03T01:20:45ZengWileyAdvances in Meteorology1687-93091687-93172013-01-01201310.1155/2013/897170897170Comparisons between Hygroscopic Measurements and UNIFAC Model Predictions for Dicarboxylic Organic Aerosol MixturesJae Young Lee0Lynn M. Hildemann1Civil & Environmental Engineering Department, Stanford University, Stanford, CA 94305, USACivil & Environmental Engineering Department, Stanford University, Stanford, CA 94305, USAHygroscopic behavior was measured at 12°C over aqueous bulk solutions containing dicarboxylic acids, using a Baratron pressure transducer. Our experimental measurements of water activity for malonic acid solutions (0–10 mol/kg water) and glutaric acid solutions (0–5 mol/kg water) agreed to within 0.6% and 0.8% of the predictions using Peng’s modified UNIFAC model, respectively (except for the 10 mol/kg water value, which differed by 2%). However, for solutions containing mixtures of malonic/glutaric acids, malonic/succinic acids, and glutaric/succinic acids, the disagreements between the measurements and predictions using the ZSR model or Peng’s modified UNIFAC model are higher than those for the single-component cases. Measurements of the overall water vapor pressure for 50 : 50 molar mixtures of malonic/glutaric acids closely followed that for malonic acid alone. For mixtures of malonic/succinic acids and glutaric/succinic acids, the influence of a constant concentration of succinic acid on water uptake became more significant as the concentration of malonic acid or glutaric acid was increased.http://dx.doi.org/10.1155/2013/897170 |
| spellingShingle | Jae Young Lee Lynn M. Hildemann Comparisons between Hygroscopic Measurements and UNIFAC Model Predictions for Dicarboxylic Organic Aerosol Mixtures Advances in Meteorology |
| title | Comparisons between Hygroscopic Measurements and UNIFAC Model Predictions for Dicarboxylic Organic Aerosol Mixtures |
| title_full | Comparisons between Hygroscopic Measurements and UNIFAC Model Predictions for Dicarboxylic Organic Aerosol Mixtures |
| title_fullStr | Comparisons between Hygroscopic Measurements and UNIFAC Model Predictions for Dicarboxylic Organic Aerosol Mixtures |
| title_full_unstemmed | Comparisons between Hygroscopic Measurements and UNIFAC Model Predictions for Dicarboxylic Organic Aerosol Mixtures |
| title_short | Comparisons between Hygroscopic Measurements and UNIFAC Model Predictions for Dicarboxylic Organic Aerosol Mixtures |
| title_sort | comparisons between hygroscopic measurements and unifac model predictions for dicarboxylic organic aerosol mixtures |
| url | http://dx.doi.org/10.1155/2013/897170 |
| work_keys_str_mv | AT jaeyounglee comparisonsbetweenhygroscopicmeasurementsandunifacmodelpredictionsfordicarboxylicorganicaerosolmixtures AT lynnmhildemann comparisonsbetweenhygroscopicmeasurementsandunifacmodelpredictionsfordicarboxylicorganicaerosolmixtures |