Use this URL to cite or link to this record in EThOS:
Title: Formation of nickel powder by decomposition
Author: Jones, L. M.
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1994
Availability of Full Text:
Access from EThOS:
This thesis describes measurements, primarily of velocity and turbulence, taken within a laboratory-scale nickel carbonyl decomposer. These measurements are part of a research programme intended to provide a fuller understanding of the formation of nickel powder by the thermal decomposition of nickel tetracarbonyl. The Laser Deppler technique was used as the only practical method available of obtaining quantitative information concerning the motion of nickel particles within the reactor. A one-component of velocity system was designed and built for this purpose and was subsequently used with a Burst Spectrum Analyzer for signal processing, to produce a map of the velocity and turbulence within the decomposer under three sets of operating conditions. Techniques for the analysis of the velocity measurements for investigating turbulent phenomena by spectral methods were also explored. Nickel powder particles generated by the reaction provided ample seeding for laser anemometry and under some operating conditions it was found that the Doppler signal quality deteriorated because the seeding density was so high. Some correlation was found between signal quality and powder properties. The measurements have highlighted the importance of turbulence, particularly in the decomposer inlet and have indicated that the flow in much of the decomposer is dominated by large scale flow structures.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available