The effect of suspended solids on mass transfer to a rotating disk

Journal Article · Wed Feb 01 00:00:00 EST 1989 · J. Electrochem. Soc.; (United States)

OSTI ID:5927218

Razaq, M; Razaq, A; Yeager, E; DesMarteau, D D; Singh, S

The enhancement of limiting currents by inert suspended solids was studied using a rotating-disk electrode (RDE). The suspensions contained glass or polymer particles in various sizes (1-100 /mu/m) and concentrations (up to 40 v/o solids). Solid particles the same size as, or smaller than, the thickness of the mass-transfer boundary layer create small-scale microconvective vortices. Particles much larger than the boundary-layer thickness appear to enhance transport by a different mechanism, possibly involving the formation of particle-free wall layers. Disk-torque measurements show that substantial increases in the limiting current require significantly less stirring power using the suspensions than by increasing the rotation rate without solids.

• Research Organization: Case Western Reserve Univ., Cleveland, OH (USA). Dept. of Chemistry; Clemson Univ., SC (USA). Dept. of Chemistry
• OSTI ID: 5927218
• Journal Information: J. Electrochem. Soc.; (United States), Vol. 136:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
30 DIRECT ENERGY CONVERSION
SOLIDS
MASS TRANSFER
SUSPENSIONS
PARTICLE SIZE
BOUNDARY LAYERS
ELECTRODES
EXPERIMENTAL DATA
GLASS
POLYMERS
ROTATING DISK REMOVAL SYSTEMS
DATA
DISPERSIONS
EQUIPMENT
INFORMATION
LAYERS
NUMERICAL DATA
POLLUTION CONTROL EQUIPMENT
SIZE
400400* - Electrochemistry
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Mass Transfer & Thermodynamics