Sulfuric acid nucleation: Power dependencies, variation with relative humidity, and effect of bases

119Citations
Citations of this article
51Readers
Mendeley users who have this article in their library.

Abstract

Nucleation of particles composed of sulfuric acid, water, and nitrogen base molecules was studied using a continuous flow reactor. The particles formed from these vapors were detected with an ultrafine condensation particle counter, while vapors of sulfuric acid and nitrogen bases were detected by chemical ionization mass spectrometry. Variation of particle numbers with sulfuric acid concentration yielded a power dependency on sulfuric acid of 5 ± 1 for relative humidities of 14-68% at 296 K; similar experiments with varying water content yielded power dependencies on H 2O of ∼7. The critical cluster contains about 5 H 2SO4 molecules and a new treatment of the power dependency for H 2O suggests about 12 H 2O molecules for these conditions. Addition of 2-to-45 pptv of ammonia or methyl amine resulted in up to millions of times more particles than in the absence of these compounds. Particle detection capabilities, sulfuric acid and nitrogen base detection, wall losses, and the extent of particle growth are discussed. Results are compared to previous laboratory nucleation studies and they are also discussed in terms of atmospheric nucleation scenarios. © 2012 Author(s).

Cite

CITATION STYLE

APA

Zollner, J. H., Glasoe, W. A., Panta, B., Carlson, K. K., McMurry, P. H., & Hanson, D. R. (2012). Sulfuric acid nucleation: Power dependencies, variation with relative humidity, and effect of bases. Atmospheric Chemistry and Physics, 12(10), 4399–4411. https://doi.org/10.5194/acp-12-4399-2012

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free