Characterization of reticulate,three — dimensional electrodes |
| |
Authors: | A Tentorio U Casolo-Ginelli |
| |
Affiliation: | (1) Divisione Ricerca e Svilippo, Istituto Ricerche G. Donegani, Montedison Via del Lavoro, 4, 28100 Novara, Italy |
| |
Abstract: | A study has been made of the mass transfer characteristics of a reticulate, three-dimensional electrode, obtained by metallization of polyurethane foams. The assumed chemical model has been copper deposition from diluted solutions in 1 M H2SO4. Preliminary investigations of the performances of this electrode, assembled in a filter-press type cell, have given interesting results: with 0.01 M CuSO4 solutions the current density is 85 mA cm–2 when the flow rate is 14 cm s–1.List of symbols
a
area for unit volume (cm–1)
-
C
copper concentration (mM cm–3)
-
c
L
copper concentration in cathode effluent (mM cm–3)
-
c
0
copper concentration of feed (mM cm–3)
-
C
0
0
initial copper concentration of feed (mM cm–3)
-
d
pore diameter (cm)
-
D
diffusion coefficient (cm2s–1)
-
F
Faraday's constant (mcoul me
q
–1
)
-
i
electrolytic current density on diaphragm area basis (mA cm–2)
-
I
overall current (mA)
-
K
m
mass transfer coefficient (cm s–1)
-
n
number of electrons transferred in electrode reaction (meq mM–1)
-
P ]
volumetric flux (cm3s–1)
-
Q
total volume of solution (cm3)
- (Re)
Reynold's number
-
S
section of electrode normal to the flux (cm2)
- (Sc)
Schmidt's number
- (Sh)
Sherwood's number
-
t
time
-
T
temperature
-
u
linear velocity of solution (cm s–1)
-
V
volume of electrode (cm3)
-
divergence operator
-
void fraction
-
u/K
m
a (cm)
-
electrical specific conductivity of electrolyte ( –1 cm–1)
-
S
potential of the solution (mV)
-
density of the solution (g cm–3)
-
v
kinematic viscosity (cm2s–1) |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|