Numerical analysis of particle radial distribution during spray pyrolysis of dual-solute precursor

Shengfeng,Luo; Mengzhao,Chang; Lun'’ang,Li; Bo,Zhou

2024-01-15

10.1016/j.powtec.2023.119266

Powder Technology   影响因子和分区

0032-5910

1873-328X

This study investigates the droplet-to-particle formation process in spray pyrolysis, focusing on interactions between low-solubility precursor A (KNO) and high-solubility precursor B (NaNO). A numerical model simulates evaporation, multi-component transport, and precipitation in droplets, and is validated with experimental data. The numerical results reveal that the preferential precipitation of KNO near the surface hinders NaNO, lowering its surface molar concentration. The radial distribution of NaNO varies with parameters, exhibiting monotonic or non-monotonic trends. The presence of a small amount of low-solubility KNO decreases NaNO near the surface, while a higher KNO proportion forms a shell layer, increasing NaNO from the center to the surface. The results also show that environmental factors influence particle size and component structure. Adjusting the precipitation rate of KNO, along with reduced temperature and droplet size, leads to smaller particles, enhancing NaNO accumulation inside and decreasing surface concentration. This work deepens understanding of pyrolysis droplet evolution, supporting customizable particle design for improved droplet-based technologies.

Droplet-to-particle formation Evaporation Multiple precursors Numerical modeling Radial distribution Spray pyrolysis

EI ; SCI

英语

第一 ; 通讯

Elsevier BV

CHEMISTRY

2-s2.0-85179892372

人工提交

Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen; 518055, China

Shengfeng,Luo,Mengzhao,Chang,Lun'’ang,Li,et al. Numerical analysis of particle radial distribution during spray pyrolysis of dual-solute precursor[J]. Powder Technology,2024,433:119266.

Shengfeng,Luo,Mengzhao,Chang,Lun'’ang,Li,&Bo,Zhou.(2024).Numerical analysis of particle radial distribution during spray pyrolysis of dual-solute precursor.Powder Technology,433,119266.

Shengfeng,Luo,et al."Numerical analysis of particle radial distribution during spray pyrolysis of dual-solute precursor".Powder Technology 433(2024):119266.