--- _id: '24502' abstract: - lang: eng text: Liquid atomization is expected to be a key process in Flame Spray Pyrolysis, as it determines the primary droplet size and velocity distribution, which represent initial conditions for flame shape and temperature field. A well-defined manipulation of atomization may be achieved by variation of nozzle geometry, injection parameter or fluid properties. However, change of fluid properties, e.g. varying solvents or increasing the precursor concentration, also influences the final particle properties. In this work, the influence of precursor concentration on fluid properties, spray and particle formation in Flame Spray Pyrolysis is experimentally investigated. High-speed shadowgraphy and Phase-Doppler measurements are conducted in a semi-closed combustion chamber with a well-defined burner geometry (SpraySyn burner) that is based on a coaxial atomization principle. By adding precursor to the flammable solvent, resulting spray characteristics, flame shape and appearance are changed in color, shape and mean droplet size distribution. Compared to resulting mean droplet sizes of pure solvent mixtures (D32, 22 μm), mean droplet sizes in the center of the precursor flame at 30 mm above the burner are generally smaller (D32, 18 μm). Persisting high share of small droplets in the droplet size distribution are presented, that presumably origin from an accumulation of metal organic precursor at the droplet surface during combustion, that acts as a diffusive barrier for high volatility solvent and thus reduces droplet evaporation. Sufficiently high above the nozzle exit, increasing the precursor concentration does not affect the radial distribution of mean droplet sizes but leads to increased mean particle sizes. More precursor presumably leads to higher concentrations of prime particles in the flame, thus probability of particle collusion and agglomeration. High-speed imaging at nozzle exit revealed random fluctuations of initial jet diameter, paired with jet axis shifting around 1000 Hz. These superposed fluctuations determine the initial conditions for atomization, induce pulsations in the flame and thus initiate the entire chain of the particle synthesis process. author: - first_name: M. full_name: Bieber, M. last_name: Bieber - first_name: R. full_name: Tischendorf, R. last_name: Tischendorf - first_name: M. full_name: Reddemann, M. last_name: Reddemann - first_name: H.-J. full_name: Schmid, H.-J. last_name: Schmid - first_name: R. full_name: Kneer, R. last_name: Kneer citation: ama: 'Bieber M, Tischendorf R, Reddemann M, Schmid H-J, Kneer R. Influence of precursor concentration on spray and particle formation in flame spray pyrolysis. In: ILASS (European Conference on Liquid Atomization and Spray Systems); 2019.' apa: Bieber, M., Tischendorf, R., Reddemann, M., Schmid, H.-J., & Kneer, R. (2019). Influence of precursor concentration on spray and particle formation in flame spray pyrolysis. ILASS (European Conference on Liquid Atomization and Spray Systems), Paris. bibtex: '@inproceedings{Bieber_Tischendorf_Reddemann_Schmid_Kneer_2019, title={Influence of precursor concentration on spray and particle formation in flame spray pyrolysis}, publisher={ILASS (European Conference on Liquid Atomization and Spray Systems)}, author={Bieber, M. and Tischendorf, R. and Reddemann, M. and Schmid, H.-J. and Kneer, R.}, year={2019} }' chicago: Bieber, M., R. Tischendorf, M. Reddemann, H.-J. Schmid, and R. Kneer. “Influence of Precursor Concentration on Spray and Particle Formation in Flame Spray Pyrolysis.” ILASS (European Conference on Liquid Atomization and Spray Systems), 2019. ieee: M. Bieber, R. Tischendorf, M. Reddemann, H.-J. Schmid, and R. Kneer, “Influence of precursor concentration on spray and particle formation in flame spray pyrolysis,” presented at the ILASS (European Conference on Liquid Atomization and Spray Systems), Paris, 2019. mla: Bieber, M., et al. Influence of Precursor Concentration on Spray and Particle Formation in Flame Spray Pyrolysis. ILASS (European Conference on Liquid Atomization and Spray Systems), 2019. short: 'M. Bieber, R. Tischendorf, M. Reddemann, H.-J. Schmid, R. Kneer, in: ILASS (European Conference on Liquid Atomization and Spray Systems), 2019.' conference: end_date: 2019-09-04 location: Paris name: ILASS (European Conference on Liquid Atomization and Spray Systems) start_date: 2019-09-02 date_created: 2021-09-15T10:26:54Z date_updated: 2022-01-06T06:56:26Z ddc: - '620' file: - access_level: closed content_type: application/pdf creator: ricardo date_created: 2021-09-28T08:39:12Z date_updated: 2021-09-28T08:39:12Z file_id: '25056' file_name: Influence of precursor concentration on spray and particle.pdf file_size: 2807339 relation: main_file success: 1 file_date_updated: 2021-09-28T08:39:12Z has_accepted_license: '1' keyword: - FSP - nanoparticle synthesis - in situ measurements language: - iso: eng publication_status: published publisher: ILASS (European Conference on Liquid Atomization and Spray Systems) status: public title: Influence of precursor concentration on spray and particle formation in flame spray pyrolysis type: conference user_id: '67002' year: '2019' ... --- _id: '24515' author: - first_name: Ricardo full_name: Tischendorf, Ricardo id: '67002' last_name: Tischendorf - first_name: M. full_name: Bieber, M. last_name: Bieber - first_name: R. full_name: Kneer, R. last_name: Kneer - first_name: Hans-Joachim full_name: Schmid, Hans-Joachim id: '464' last_name: Schmid citation: ama: 'Tischendorf R, Bieber M, Kneer R, Schmid H-J. Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements. In: PARTEC 2019 International Congress on Particle Technology; 2019.' apa: Tischendorf, R., Bieber, M., Kneer, R., & Schmid, H.-J. (2019). Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements. PARTEC 2019 International Congress on Particle Technology, Nürnberg. bibtex: '@inproceedings{Tischendorf_Bieber_Kneer_Schmid_2019, title={Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements}, publisher={PARTEC 2019 International Congress on Particle Technology}, author={Tischendorf, Ricardo and Bieber, M. and Kneer, R. and Schmid, Hans-Joachim}, year={2019} }' chicago: Tischendorf, Ricardo, M. Bieber, R. Kneer, and Hans-Joachim Schmid. “Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements.” PARTEC 2019 International Congress on Particle Technology, 2019. ieee: R. Tischendorf, M. Bieber, R. Kneer, and H.-J. Schmid, “Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements,” presented at the PARTEC 2019 International Congress on Particle Technology, Nürnberg, 2019. mla: Tischendorf, Ricardo, et al. Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements. PARTEC 2019 International Congress on Particle Technology, 2019. short: 'R. Tischendorf, M. Bieber, R. Kneer, H.-J. Schmid, in: PARTEC 2019 International Congress on Particle Technology, 2019.' conference: end_date: 2019-04-11 location: Nürnberg name: PARTEC 2019 International Congress on Particle Technology start_date: 2019-09-04 date_created: 2021-09-15T10:46:51Z date_updated: 2022-03-16T21:35:09Z ddc: - '620' file: - access_level: closed content_type: application/pdf creator: ricardo date_created: 2021-09-28T08:35:36Z date_updated: 2021-09-28T08:35:36Z file_id: '25054' file_name: 46.3_Tischendorf.pdf file_size: 319929 relation: main_file success: 1 file_date_updated: 2021-09-28T08:35:36Z has_accepted_license: '1' keyword: - FSP - nanoparticle synthesis - in situ measurements language: - iso: eng publication_status: published publisher: PARTEC 2019 International Congress on Particle Technology status: public title: Representative Sample Extraction from Spray Flames for SMPS and HR-TEM Measurements type: conference_abstract user_id: '67002' year: '2019' ...