Ed. Wouldn't the Cl- ions arriving at the anode dissolve the MgO which is
acid soluble?
Frederick
Waiting for " Davis The Plumber" to fix the electronic pilot on the gas
furnace $80.00 service call
charge plus $50.00 "Mandatory Safety Inspection" plus Parts & Labor.
Energy Efficiency at a price. :-)
Ed Storms wrote:
>
> Nice idea, Horace, but you fail to consider one important aspect of using
Mg as
> the anode. Oxygen that forms at the anode will react to form MgO, which
is an
> insulator and is insoluble. As a result, cell resistance will increase
to
> unacceptable values. This same kind of reaction occurs when Zr or Ti are
used
> as the anode as well. A very low applied current would be the only
condition
> permitting use of Mg. The current would have to be small enough so that
the
> formation rate of MgO would have to be less than its rate of dissolution
from
> the surface.
>
> Regards,
> Ed
>
> Horace Heffner wrote:
>
> > At 1:07 AM 11/27/4, Frederick Sparber wrote:
> >
> > >Most likely, use of a Magnesium Anode (Sacrificial Cathodic
Protection) and
> > >a Palladium Cathode with a LICl-D2O electrolyte will get more CF-OU
bang
> > >for the buck
> > >than using a power supply.
> >
> > Lets play with this lead a bit. One problem with using Mg as the anode
is
> > depositing of Mg on the cathode will change its electronegativity. Mg
can
> > not be used as a separate (biasing) anode because then its potential,
> > though possibly preserving loading when the "real" anode potential is
not
> > provided, does not add to the "real" anode when it is positive. To
obtain
> > the "bias" the Mg anode must be used as "the" anode, and thus it carries
> > the full cell current and transports MG Accordingly.
> >
> > Perhaps this can be worked up into a viable concept. Suppose the add-on
> > potential comes in the form of AC produced by capacitive coupling to the
> > cell, as shown in Fig. 1 below.
> >
> > ------------
> > | |
> > IIII|IIIII | Mg bias connection
> > II MMM II |
> > II II |
> > II II |
> > | II C II | | KEY:
> > | II C II | |
> > | II C II | | M - Mg bias anode
> > | II C II | | C - Cathode
> > | II C II | | A - Current supplying anode
> > | II C II | | II - Insulating dielectric
> > | II C II | |
> > | II C II | |
> > | II C II | |
> > (AC)----------| II C--------o----(-) Cathode potential
> > | II C II |
> > | II C II |
> > | II C II |
> > | II C II |----(-AC)
> > | II C II |
> > | II C II |
> > Plate 1 | II C II | Plate 2
> > | II C II |
> > | II C II |
> > II II
> > II AAAA II
> > IIIII|IIII
> > |
> > (+) Current Anode (Anode potential)
> >
> > Fig. 1 - Diagram of Biased AC Electrolysis Cell
> > Top View, Cross section
> >
> > Perhaps elecrolysis occurs during the positive cycle for Plate 2? The
> > electode "AAAA"is necessary to provide the net current which results -
due
> > to current flowing when Plate 1 is positive and no current flowing when
> > Plate 1 is negative. Without the Current Anode the cell potential will
go
> > negative and stop all adsorbtion. Again deposition of Mg on the cathode
> > may end the bias provided by the sacrificial Mg anode. An alternative
may
> > be to use a Pt current providing anode ("AAAA") which also provides the
> > bias voltage (about 1.4 V) for the AC. The bias voltage provided by
"MMM"
> > or "AAAA" is large enough to sustain the cathode loading but small
enough
> > to avoid much evolved hydrogen. In this arrangement the interface
> > essentially acts like a diode, an "incremental diode".
> >
> > It's too good to be true. Just wishful thinking? After this long day I
> > can't call it one way or another. I suppose the possibility of
electolysis
> > improvement boils down to whether or not the current anode or bias
anode is
> > supplying current when Plate 1 is postitive.
> >
> > Regards,
> >
> > Horace Heffner
