Author: David Jeffries RohaPublisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 604
Book Description
Effects of Suspended Particles on the Rate of Mass Transfer to a Rotating Disk Electrode
Author: David Jeffries RohaPublisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 604
Book Description
Effects of Suspended Particles on the Rate of Mass Transfer to a Rotating Disk Electrode. [Ferric Cyanide].
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Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Limiting currents for the reduction of ferric cyanide at a rotating disk were determined in the presence of 0 to 40 percent by volume of spherical glass beads. Experiments were conducted with six different particle diameters, and with rotation speeds in the range of 387 to 270 rpm, usong both a 0.56 cm and a 1.41 cm radius disk electrode. It was established that at a given rpm upon addition of glass beads in the limiting current, i/sub L/, may increase to more than three times its value without solids. This increase in limiting current density is greater at high rotation speeds and with the larger disk electrode. i/sub L/ as a function of particle diameter yields at maximum at approx. 10 .mu.m. Two mass transfer models are offered to explain this behavior, both of which assume that the beads are in contact with the disk electrode and moving parallel to its surface. In the surface renewal model it is assumed that complete mixing takes place with the passage of each bead and the boundary layer is replaced with fresh bulk solution. While with the particle film model it is assumed the bead and a clinging film of fluid rotate together. The film promotes mass transfer by alternately absorbing and desorbing the diffusing species. The particle film model best explains the observed behavior of the limiting current density. Calculations of stirring power required verses i/sub L/ observed, show that adding beads to increase i/sub L/ consumes less additional power than simply increasing the rotation speed alone and even permits a decrease in the amount of stirring energy required per unit reactant consumed, at limiting current conditions.
The Effect of Suspended Particles on the Rate of Mass Transfer to a Rotating Cylinder Electrode
Author: Daniel William GibbonsPublisher:
ISBN:
Category :
Languages : en
Pages : 242
Book Description
The Effect of Suspended Solids on Mass Transfer in Electrochemical Systems
Author: Paul Kirk AndersenPublisher:
ISBN:
Category : Mass transfer
Languages : en
Pages : 246
Book Description
Scientific and Technical Aerospace Reports
Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 976
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Proceedings of the Symposium on Transport Processes in Electrochemical Systems
Author: Electrochemical Society. Battery DivisionPublisher: Pennington, N.J. : Electrochemical Society
ISBN:
Category : Electrochemistry
Languages : en
Pages : 292
Book Description
Energy Research Abstracts
Author: Current Awareness in Particle Technology
Author: Materials and Molecular Research Division Annual Report
Author: Lawrence Berkeley Laboratory. Materials and Molecular Research DivisionPublisher:
ISBN:
Category : Materials
Languages : en
Pages : 340
Book Description
Directory of Graduate Research
Author: American Chemical Society. Committee on Professional TrainingPublisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 1294
Book Description