Drying Technology· 2026Q2
Feed temperature as a rheological modulator: Coupling viscosity, atomization, and drying kinetics to control particle morphology in spray drying of aqueous extracts
- 1citations
- Q2SCImago
- 2026year
Short summary
Increasing feed temperature from 293.15 K to 353.15 K for Ziziphus jujuba aqueous extracts reduced apparent viscosity (13.9 ± 0.4 kJ·mol−1 activation energy), predicted a 27.4% smaller droplet diameter, and increased powder yield to 94.6% at 323.15 K, leading to finer, more uniform particles.
AI-generated from the title and abstract; the full text is not read.
Key points
- Feed temperature significantly impacts viscosity, atomization, drying kinetics, and particle morphology in spray drying.
- Apparent viscosity of Ziziphus jujuba aqueous extracts decreased with temperature, with a viscous-flow activation energy of 13.9 ± 0.4 kJ·mol−1.
- Higher feed temperatures (up to 323.15 K) led to finer, more uniform particles and a maximum powder yield of 94.6%.
- Excessively high feed temperatures (>323.15 K) increased particle adhesion and broadened particle-size distribution.
AI-generated from the title and abstract; the full text is not read.
Abstract
Spray drying of aqueous extracts is often limited by wall deposition and particle agglomeration. Using Ziziphus jujuba aqueous extracts, this study investigated how feed temperature (293.15–353.15 K) affects viscosity, atomization, drying, powder yield, and particle morphology. Apparent viscosity decreased with temperature, giving a viscous-flow activation energy of 13.9 ± 0.4 kJ·mol−1. Incorporating the measured viscosity-temperature relationship into atomization analysis predicted a 27.4% reduction in normalized initial droplet diameter, a trend qualitatively supported by the measured 56% decrease in moisture ratio and finer, more uniform particles at moderate feed temperatures. Powder yield first increased and then decreased, reaching 94.6% at 323.15 K. Lower temperatures favored wet adhesion, whereas higher temperatures increased particle adhesion and agglomeration. Further heating broadened the particle-size distribution. These results show that feed temperature regulates spray drying through coupled effects on rheology, atomization, drying, and particle formation.
The authors' abstract, as published at the source. Drying Technology, 2026 · DOI ↗
Continue with a free account
Ask the paper: 3 free questions a day about this paper; save it, get its citation, new summaries every day for your field. Takeaways are Premium.
Continue free on the webSign in with Google or Apple; no card needed. You come back to this paper.
On your phone:
Field: Food Science
Food ScienceAgricultural and Biological Sciences