Experimental study on the nucleation of water vapor sulfuric acid binary system

Abstract

The formation of aerosols in a gaseous mixture of water and sulfuric acid was studied experimentally. The formation of particles having been demonstrated during previous experiments, an experimental device was developed which would make it possible to determine the rate of nucleation for different values of partial pressure of water vapor and sulfuric acid. These results were compared with the numerical values given by Mirabel and Katz on the one hand, and by Kiang and Stauffer on the other hand; it was found that the most satisfactory correlation is obtained when the value of 3.5×10−4 torr is adopted for the pressure of the sulfuric acid saturating vapor at a temperature of 20 °C.

Homogeneous nucleation of sulfuric acid and water mixture: experimental setup and first results

“…Similar experiments were conducted by Boulaud et al (1977) in a reactor study, Mirabel and Clavelin (1978) in a thermal diffusion cloud chamber, and Friend et al (1980) in a laminar flow reactor. More recent experiments include those made by Wyslouzil et al (1991), Viisanen et al (1997), Ball et al (1999), Zhang et al (2004), Berndt et al (2006), Benson et al (2008), and Young et al (2008).…”

Enthalpy and entropy changes in formation of gas phase sulfnric acid monohydrates and dihydrates as a result of fitting to experimental pressure data

“…The classical nucleation theory (including certain variants) is presently the only practical approach for predicting sulfuric acid/water nucleation rates. Unfortunately, the predictions of the theory for this system have not been reliably tested so far, as the various laboratory measurements are not in quantitative agreement [Boulaud et al, 1977 hydrates (small clusters of acid and water molecules) in the gas phase. The hydrates stabilize the vapor.…”

Binary nucleation of sulfuric acid-water: Monte Carlo simulation

“…Comparisons of the classical predictions with experimental data for H 2 SO 4 /H 2 O nucleation, while not extensive, yield conflicting results as to the validity of the classical theory. 19,28,29,31,32 Thus, it is of great interest on both fundamental and practical grounds, to seek a molecular level description of binary H 2 SO 4 /H 2 O nucleation.…”

“…One of the most important binary nucleating systems is H 2 SO 4 /H 2 O, to which numerous papers are devoted on both theoretical [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] and experimental [27][28][29][30][31][32] fronts. Comparisons of the classical predictions with experimental data for H 2 SO 4 /H 2 O nucleation, while not extensive, yield conflicting results as to the validity of the classical theory.…”