Binary collision of a burning droplet and a non-burning droplet of xylene: Outcome regimes and flame dynamics

Xiong, Gang; Gandhi, Rahul; Zhong, Xiangbin; Mädler, Lutz; Tse, Stephen D.

doi:10.1016/j.proci.2018.06.198

Cited by 5 publications

(3 citation statements)

References 46 publications

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“…77,78,168,169 SD reactors simplify the complex environment of a reactive spray and can be seen as an invaluable tool to derive fundamental growth mechanisms of nanoparticles in reactive sprays (as discussed below in section 3). More recently, multiple SD reactors have been combined to study binary interactions between a burning and non-burning xylene droplet 170 or two burning xylene droplets. 171 These double droplet concepts are currently adapted to precursor−solvent mixtures for metal oxide nanoparticle synthesis.…”

Section: T H Imentioning

confidence: 99%

“…However, the relatively small sample yield might be insufficient for common powder X-ray diffraction (XRD) and Brunauer–Emmett–Teller (BET) analysis and restricting the analysis of SD-made nanoparticle reactors thus far to time-/labor-intensive electron microscopy. ,,, SD reactors simplify the complex environment of a reactive spray and can be seen as an invaluable tool to derive fundamental growth mechanisms of nanoparticles in reactive sprays (as discussed below in section ). More recently, multiple SD reactors have been combined to study binary interactions between a burning and non-burning xylene droplet or two burning xylene droplets . These double droplet concepts are currently adapted to precursor–solvent mixtures for metal oxide nanoparticle synthesis.…”

Section: Process Overview Of Flame Aerosol-based Manufacturingmentioning

confidence: 99%

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Synthesis of Metal Oxide Nanoparticles in Flame Sprays: Review on Process Technology, Modeling, and Diagnostics

Meierhofer

Fritsching

2021

Energy Fuels

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The gas synthesis of nanoparticles has gained major interest by different industries and research groups for the development of new materials and their subsequent implementation in numerous devices and applications. Actually, there are numerous research and application activities in flame-based nanoparticle production, mainly focusing on the process and its development, the in situ and ex situ analyses in experiments and simulations and new material and material combination developments. This review provides an overview on the flame synthesis of metal oxide nanoparticles and focuses in particular on the process design of flame spray pyrolysis (FSP). The first part of this review describes the historical background of flame-based particle production and further summarizes the emerging developments, achievements, and trends during the past 2 decades. The second part covers a general process overview of the flame aerosol-based manufacturing by explaining the key aspects of synthesis (chemical raw materials, metal precursors, solvents, and reactor configurations), in situ conditioning approaches, and powder and byproduct collection, along with additional post-processing steps (storage, handling, and modification). Applications of flame-made nanoparticles involve catalysts, gas sensors, energy storage materials, and nanotoxicity studies, among others, which will not be discussed in detail but are overviewed by listing the latest reviews of the respective field. The third part focuses on the growth mechanisms of solid particle products in liquid droplet/spray pyrolysis (liquid-to-particle and gas-to-particle conversion). The concept of characteristic process times is then exemplified for a lab-scaled FSP reactor, while afterward, particle dynamics and continuum models for reactor simulation are reviewed. The fourth part is a survey of more than 20 different diagnostic techniques that are commonly employed for characterization of reactive sprays and flame-made powders. We briefly explain the metrology basics of each method, indicate advantages and limitations, and present exemplary measurement results that have been acquired on flame reactor facilities for particle synthesis. Finally, we summarize the review and address some current challenges that might potentially shape the near future of nanoparticle synthesis in flame sprays.

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Section: T H Imentioning

confidence: 99%

Section: Process Overview Of Flame Aerosol-based Manufacturingmentioning

confidence: 99%

Synthesis of Metal Oxide Nanoparticles in Flame Sprays: Review on Process Technology, Modeling, and Diagnostics

Meierhofer

Fritsching

2021

Energy Fuels

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“…Droplet collisions are ubiquitous in natural phenomena and industrial applications. − Since the current method enables independent control of the droplet size and ejection velocity, it can be applied to improve the control flexibility of droplet collision process. Preliminary test is conducted here.…”

Section: Resultsmentioning

confidence: 99%

Droplet Ejection by Pulsatile Airflow

Wang,

Xia,

Zhu

2024

Ind. Eng. Chem. Res.

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Droplet ejection is a promising technology for a variety of biological and chemical processes. In its applications, an important and challenging issue is the precise control on the droplet size, frequency and velocity. Herein, a pulsatile perturbation strategy is proposed to improve the control of droplet parameters. Using this active method, the ejection frequency is synchronized with applied pulsation disturbance. Both the droplet volume and ejection velocity are independently and linearly tunable. Moreover, it expands the regulation range of droplet size, and the generated droplets are highly monodisperse. The relative standard deviation (RSD) of the droplet volume and ejection velocity is 3.5 and 3.9%, respectively. The applicable fluid viscosity is up to 100 mPa•s. The influences of the pulsation amplitude, frequency, duty cycle, and the liquid viscosity are also investigated. The improved control flexibility will greatly facilitate potential applications of the droplet ejection technology.

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Experimental research of the vapor zone between two coalescing droplets of heated water

Кузнецов

Piskunov

Shlegel

et al. 2021

International Communications in Heat and Mass Transfer

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Binary collision of a burning droplet and a non-burning droplet of xylene: Outcome regimes and flame dynamics

Cited by 5 publications

References 46 publications

Synthesis of Metal Oxide Nanoparticles in Flame Sprays: Review on Process Technology, Modeling, and Diagnostics

Synthesis of Metal Oxide Nanoparticles in Flame Sprays: Review on Process Technology, Modeling, and Diagnostics

Droplet Ejection by Pulsatile Airflow

Experimental research of the vapor zone between two coalescing droplets of heated water

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