Articles | Volume 19, issue 14
https://doi.org/10.5194/acp-19-8999-2019
https://doi.org/10.5194/acp-19-8999-2019
Research article
 | 
17 Jul 2019
Research article |  | 17 Jul 2019

H2SO4 and particle production in a photolytic flow reactor: chemical modeling, cluster thermodynamics and contamination issues

David R. Hanson, Hussein Abdullahi, Seakh Menheer, Joaquin Vences, Michael R. Alves, and Joan Kunz

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Latest update: 13 Mar 2025
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Short summary
Particle formation was studied in a flow reactor with photolytic generation of sulfuric acid. Comparisons with previous results are a mixed bag with plenty of outliers. Addition of bases (dimethylamine and ammonia) led to large increases in particle numbers. Model simulations suggest that previous dimethylamine–sulfuric acid cluster thermodynamics are good, while a new set of the free energies of ammonia–sulfuric acid clusters was needed.
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