Here is a 25+ year old paper from Leif Holmlid, which turned up on
another forum. It is easy to ignore, but if it represented a robust
effect of hydrogen with graphite at the femtoscale - it would rank as
one of his most important. OTOH, he has probably forgotten about it and
probably got the explanation wrong to boot.
http://www.sciencedirect.com/science/article/pii/030101049280080F?via%3Dihub
Assuming that this reaction was robust on scale-up (admittedly not
expected) there is an energy application which is elegantly simple and
should be mentioned. But as we know, scale-up of quantum reactions is
the exception, not the rule. The suggested application is low tech... as
in a converted piston engine.
In the old experiment, hydrogen goes into an excited state in contact
with graphite at 1400 K or less. This may also happen in LENR (e.g.
Cravens' NIWeek and Mizuno phenanthrene). A detector finds a signal
which gives Arrhenius plots with a slope of 1.3 eV. Quote: "It is shown
that this type of temperature variation cannot be due either to electron
emission, alkali atom or ion desorption or emission of excited alkali
states from metal or graphite surfaces, since these processes have much
larger activation energies." END
Obviously, the energy is too low to relate to Mills' Rydberg multiples.
However, the temperature equivalent of 13,000 degrees means that it
could be useful for a closed cycle gas conversion cycle, on scale up,
possibly a hybrid thermodynamic cycle.
As for theory, this is not LENR or Millsean and it hints at some kind of
Dirac/Hotson interaction with the epo field, which is the quantum vacuum
(quantum foam or aether). This epo field can be thought of essentially
as a superfluid with an internal binding energy of 6.8 eV yet not
"located" in our 3-space, except on a very short time scale. A proton
induced bleed-over into 3-space from the Dirac field in "reciprocal
space" could show up as 1.3 eV and a COP= ~9.
As for the possible application, a piston engine would be a good fit
since you want thermal pulsation at modest trigger temperature and a
complete avoidance of chemical reactions with carbon. This should be a
closed-cycle, hydrogen-filled engine, with the simple modification of a
piston crown coated with graphite. Given what we know today, it is
likely that graphene would function better, but Holmlid did not have
easy access to graphene in 1992. The carbon must be kept relatively cool
to avoid chemical reaction, if that is possible - making pulsation the
only viable method. Thus a hybrid Brayton/Otto closed-cycle is possible.
