Multiscale modeling for surface composition of spray‐dried two‐component powders

Abstract

Spray drying is a primary process for manufacturing various powder products. One of the most important properties of powders is the ability to get wet. Surface chemical composition critically influences this property. Furthermore, surface composition also influences the efficiency of production as it affects the stickiness of the powder. This work is an attempt to analyze the surface compositions of spray-dried two-component powders produced under various conditions using an innovative multiscale modeling approach. A molecular-level geometrical interpretation is seamlessly coupled with a continuum diffusion model. The predictions are compared with the measurements done on the protein-lactose system using X-ray photoelectron spectroscopy. Sample calculations for the system have demonstrated that the new approach helps reveal surface formation mechanisms much better than that explained with the monoscale continuum approach. This work provides a good basis for a fruitful area of study toward surface composition-focused powder quality control that will have a positive impact in industries.

A continuum‐approach modeling of surface composition and ternary component distribution inside low fat milk emulsions during single droplet drying

“…The approach was then implemented to model the surface composition of casein in a binary system of casein and lactose 31 . The model was further extended to include the microscale packing model with good agreement towards the experimental data of the binary system 32 .…”

Three-Dimensional Numerical Investigation of a Mono-Disperse Droplet Spray Dryer: Validation Aspects and Multi-Physics Exploration

“…As investigated previously [50,51], the particle surface composition is different from the core. For instance, for skim milk particles fat comprises of 18 wt% of the surface solids, while for the bulk particle fat content is only ≈1% [52].…”

Numerical Modelling of Formation of Highly Ordered Structured Micro- and Nanoparticles – A Review

“…Buesser and Pratsinis (2011) proposed the simulation of gas-phase synthesis of CSPs (TiO 2 -SiO 2 ) by coupling of CFD with tracking of single particle motion. An example of the application of multiscale model may be found in (Xiao and Chen, 2014). For simulation of synthesis of two components particles in the spray drying process, the molecular-level model has been coupled with a continuum diffusion approach.…”