Ammonium Sulfate Bertram

Effects of sulfuric acid and ammonium sulfate coatings on …

The onset conditions for ice nucleation on H2SO4 coated, (NH4)2SO4 coated, and uncoated kaolinite particles at temperatures ranging from 233 to 246 K were studied. We …

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Effects of molecular weight and temperature on …

at 273K and 290K for particles containing ammonium sul-fate and 1,2,6-hexanel (Bertram et al., 2011). Schill and Tolbert, 2013 reported that SRH results were similar for tem-peratures …

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Strong dependence of cubic ice formation on droplet ammonium to sulfate

ammonium-sulfate-nitrate particles on global aerosol direct radiative for- ... A. K. Bertram (2006), Measurements of the vapor pressure of cubic ice. and their implications for …

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Viscosity and physical state of sucrose mixed with ammonium sulfate …

Abstract. Although knowledge of the physical state of aerosol particles is essential to understand atmospheric chemistry model and measurements, information on the viscosity …

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[PDF] Predicting the relative humidities …

Abstract. Individual particles that on a mass basis consist dominantly of the components ammonium sulfate, oxygenated organic material, and water are a common class of submicron …

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Granulation by spray coating aqueous solution of ammonium sulfate …

Spherical 2–4 mm granules of ammonium sulfate (NH 4) 2 SO 4 are promising fertilizer for practical use, though only much smaller grains are being produced in industry. …

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Liquid-liquid phase separation in particles containing …

In the following we studied liquid-liquid phase separation in particles containing organics mixed with the following salts: ammonium sulfate, ammonium bisulfate, ammonium …

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Heterogeneous Drop Freezing in the …

The model results for the freezing temperatures T f,s of drops containing ammonium sulfate, as well as the freezing point depression ΔT f, are listed in Table 3 together with the …

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Hygroscopic and phase separation properties of …

Crystalline ammonium sulfate has been shown to be a poor nucleus for 15 subsequent heterogeneous nucleation of organics, which may serve to explain why certain 16 organics …

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Liquid–liquid phase separation in particles containing …

mixed with ammonium sulfate, ammonium bisulfate, ammonium nitrate or sodium chloride Y. You, L. Renbaum-Wolff, and A. K. Bertram ... Bertram et al., 2011; Reid et al., 2011; Song et al., …

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ACP

As the relative humidity varies from high to low values in the atmosphere, particles containing organic species and inorganic salts may undergo liquid–liquid phase separation. The majority …

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(PDF) Predicting the relative humidities of liquid …

Here we use (1) the organic-to-sulfate (org:sulf) mass ratio of the overall particle and (2) the oxygen-to-carbon (O:C) elemental ratio of the organic component as input variables in...

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ACP

Specifically these variables were used to predict the critical relative humidity of liquid-liquid phase separation (SRH), efflorescence (ERH), and deliquescence (DRH). Experiments were …

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Deliquescence and Crystallization of Ammonium Sulfate …

The deliquescence and crystallization of ammonium sulfate particles internally mixed with water-soluble organic material have been studied, restricted to an organic mass fraction of less than …

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Publications | Bertram Research Group

A.K. Bertram, and S.T. Martin, Deliquescence, efflorescence, and phase miscibility of mixed particles of ammonium sulfate and isoprene-derived secondary organic material.

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Viscosity and physical state of sucrose …

Abstract. Although knowledge of the physical state of aerosol particles is essential to understand atmospheric chemistry model and measurements, information on the …

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Ice nucleation in sulfuric acid and ammonium sulfate …

effective for measuring ice nucleation in sulfate aerosol [Bertram et al., 1996; Cziczo and Abbatt, 1999]. We deviate from earlier FTIR studies, however, in our method of ... ammonium sulfate …

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Liquid–liquid phase separation in particles containing …

Abstract. As the relative humidity varies from high to low values in the atmosphere, particles containing organic species and inorganic salts may undergo liquid–liquid phase …

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Strong dependence of cubic ice formation on droplet ammonium to sulfate

[1] We show that the phase of ice that crystallizes in solution droplets, under conditions relevant for the upper troposphere (UT) and tropopause region (typically >188 K), is …

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Raman spectra of (a) a pure ammonium sulfate …

The Cryo- TEM results indicate that ammonium sulfate particles (or particles at least dominated by ammonium sulfate) are mixed with a secondary compound that separated during freezing in the TEM ...

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Liquid–liquid phase separation in particles containing …

You, Y, Renbaum-Wolff, L, Bertram, AK: Journal: Atmospheric Chemistry and Physics: Volume: 13: Pagination: ... ammonium sulfate, ammonium bisulfate, ammonium nitrate and sodium …

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Phase State and Deliquescence Hysteresis of Ammonium-Sulfate …

The particles were composed of ammonium sulfate ([NH 4] 2 SO 4) seed and a secondary organic matter (SOM) shell formed from oxidized α-pinene or isoprene. The …

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Effects of sulfuric acid and ammonium sulfate coatings on …

[1] The onset conditions for ice nucleation on H 2 SO 4 coated, (NH 4) 2 SO 4 coated, and uncoated kaolinite particles at temperatures ranging from 233 to 246 K were …

WhatsApp: +86 18221755073

Strong dependence of cubic ice formation on droplet ammonium to sulfate …

We show that the phase of ice that crystallizes in solution droplets, under conditions relevant for the upper troposphere (UT) and tropopause region (typically >188 K), is strongly dependent on …

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[PDF] Deliquescence, efflorescence, and phase miscibility of …

Efflorescence and deliquescence phase transitions, as well as phase separation, in particles composed of toluene-derived SOM, ammonium sulfate, and water were studied by …

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Effects of Different Types of Sulphates and …

C. Sodium Sulphate (Na 2SO 4): The anhydrous form of sodium sulphate was used in the experiment, with a molar mass of 142.04g/mol and a percentage purity of 99%. Sodium …

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Images reveal that atmospheric particles can …

In a first set of measurements focused on the laboratory samples, we investigated the phase behavior of particles consisting of ammonium sulfate mixed with SOM that had been produced for conditions designed to simulate …

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phase-separated organic-sulfate particles: eﬀect of …

of ammonium sulfate (Bertram et al., 2011; Smith et al., 2011). Past work has shown that phase-separated particles containing two liquids can as- sume a number of partially engulfed …

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Phase State and Deliquescence Hysteresis of …

of Ammonium-Sulfate-Seeded Secondary Organic Aerosol Erkka Saukko,1 Soeren Zorn,2 Mikinori Kuwata,3 Jorma Keskinen,1 and Annele Virtanen4 ... ratio (Bertram et al. 2011 and …

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