spray flame
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2022 ◽  
Author(s):  
Luigi Miniero ◽  
Khushboo Pandey ◽  
Sergey Shcherbanev ◽  
Ulrich Doll ◽  
Nicolas Noiray

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6698
Author(s):  
Simon Aßmann ◽  
Bettina Münsterjohann ◽  
Franz J. T. Huber ◽  
Stefan Will

The investigation of droplet and nanoparticle formation in spray flame synthesis requires sophisticated measurement techniques, as often both are present simultaneously. Here, wide-angle light scattering (WALS) was applied to determine droplet and nanoparticle size distributions in spray flames from a standardized liquid-fed burner setup. Solvents of pure ethanol and a mixture of ethanol and titanium isopropoxide, incepting nanoparticle synthesis, were investigated. A novel method for the evaluation of scattering data from droplets between 2 µm and 50 µm was successfully implemented. Applying this, we could reveal the development of a bimodal droplet size distribution for the solvent/precursor system, probably induced by droplet micro-explosions. To determine nanoparticle size distributions, an appropriate filter and the averaging of single-shot data were applied to ensure scattering from a significant amount of nanoparticles homogeneously distributed in the measurement volume. From the multivariate analysis of the scattering data, the presence of spherical particles and fractal aggregates was derived, which was confirmed by analysis of transmission electron microscopy images. Monte Carlo simulations allowed determining the distribution parameters for both morphological fractions in three heights above the burner. The results showed relatively wide size distributions, especially for the spherical fraction, and indicated an ongoing sintering, from fractal to spherical particles.


Fuel ◽  
2021 ◽  
pp. 122445
Author(s):  
Shijie Xu ◽  
Shenghui Zhong ◽  
Ahmad Hadadpour ◽  
Yan Zhang ◽  
Kar Mun Pang ◽  
...  

2021 ◽  
Author(s):  
Alexander Keller ◽  
Irenäus Wlokas ◽  
Maximilian Kohns ◽  
Hans Hasse

The simulation of spray flame processes for the production of high-quality nanoparticles relies on thermophysical properties of the precursor solutions, for which literature data are scarce. Here, we report experimental thermophysical data of solutions of iron(III) nitrate nonahydrate (INN) in (1-propanol + water) mixed solvents. The specific density, viscosity, thermal conductivity, and isobaric heat capacity of the solutions were measured at 101.3 kPa between 288.15 and 333.15 K, solvent compositions ranging from 0.73 mol mol–1 1-propanol to pure water, and INN molalities up to 1.3 mol kg–1. Empirical correlations of the experimental data are provided.


Author(s):  
Julia Büker ◽  
Baris Alkan ◽  
Sonia Chabbra ◽  
Nikolai Kochetov ◽  
Tobias Falk ◽  
...  

2021 ◽  
Author(s):  
Hyun Jo ◽  
Yuta Kawai ◽  
Naoto Horibe ◽  
Jun Hayashi ◽  
Hiroshi Kawanabe ◽  
...  

2021 ◽  
Author(s):  
Tetsuya Aizawa ◽  
Tomoki Kinoshita ◽  
Yohei Tanaka ◽  
Tatsuki Takahashi ◽  
Yuusei Miyagawa ◽  
...  

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