Drying and Crystallization of Evaporating Sodium Nitrate Aerosol Droplets.

Clicks: 241
ID: 108117
2020
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Emerging

Ranked #28 of 42 articles by views in the journal of physical chemistry b

Most read Least read

Bar heights use a square-root scale.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
The evaporation of liquid solution droplets and solute crystallization can be highly complex and is an important problem, particularly in spray drying where powdered products are produced from sprayed liquid droplets, such as in the food or pharmaceutical industries. In this work, we study the relationship between the evaporation rates of single levitated NaNO3 droplets under varying environmental conditions and the propensity for nucleation of NaNO3 crystals. We use a combination of an electrodynamic balance to study single-droplet evaporation kinetics, SEM imaging of dried particles and modelling of the internal solute distribution inside a drying droplet. We show that the aqueous NaNO3 droplets exhibit broad distributions in the time that crystal nucleation is observed, droplet-to-droplet. The distribution of nucleation time is dependent upon environmental conditions such as the drying temperature, relative humidity (RH) and solute concentration. Even when evaporating in 0 % RH, some droplets do not nucleate crystals in the time taken for all water to evaporate and dry to form an amorphous particle. We believe that this interplay between crystalline or amorphous particle formation is a result of the viscosity of aqueous NaNO3 solutions, which rises by several orders of magnitude as the concentration increases. We show that for droplets with an initial radius of ~ 25 µm the propensity for aqueous NaNO3 droplets to nucleate crystals upon drying increases with a decreasing RH, and increases with an increasing temperature in the range of 278 - 306 K. This work demonstrates the importance of the drying kinetics on the propensity of evaporating droplets to nucleate crystals.
Reference Key
gregson2020dryingthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Gregson, Florence K A;Robinson, Joshua F;Miles, Rachael E H;Royall, C Paddy;Reid, Jonathan Philip;
Journal the journal of physical chemistry b
Year 2020
DOI
10.1021/acs.jpcb.0c04079
URL
Keywords
oral submucous fibrosis areca nut and its byproduct abuse psychosocial effects

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.