Hi GF,
There has to be a minute available to make comment on this subject;
I found the information quite enlightening in The Linsay Publication Issue
of:
“Gas Engine& producer Gas Plants” By R.E.Mathot.
This book describes various systems of early gasification processes.
There was one item which seems to have been neglected in the construction
of the modern equivalents.
It played an important role on “Pressure” gasifiers and was also included
on “suction systems of many types.
The enrichment of the gas produced by cracking water was highly valued;
notes are included of BTU improvement of gas quality, using calorimeters.
The inclusion of the VAPORIZER seems to be of little importance today.
Without splitting hairs, most of those historic gasifiers were coal or
charcoal, to which the addition of steam improved their gas quality. Biomass
gasification based on more recent experience, shows it is not required. You
can of course find exceptions to this rule of thumb, where-by, the very dry
dead wood of ring barked eucalyptus in Australia, did work better if a bit
of steam was added. Steam works best into incandescent carbon beds.
Our modern gasification technologies separate steam gasification into the
pressurized Syngas plants which we all know is far superior in BTU content,
compared to producer gas. While many working with gasifiers describe their
work making "syngas", it is in fact fraudulent to do so, when the difference
is like night and day.
With the high exhaust temperatures of gasifier fuelled ICE combos
It would be a simple modification to wrap a few turns of metal tube around
the exhaust manifold and meter water according to demand, there through
and conduct said flow of >super heated steam to the reaction area of the
gasifier.
This is a description of how Brisbane Taxi drivers in the 1940's improved
their engine performance on rationed gasoline. Mobile gasifiers are usually
mounted some distance from the engine, and if charcoal, which is the
smallest and lightest choice of gasifiers design is used, then heat losses
are not an issue, but need the addition of steam to provide H2.
In this way it would be possible to claim some waste heat from the engine
and use it to cancel out the endothermic losses of the FT reaction.
I am not sure if you are still talking gasification or liquid fuels with
this comment, but it is easy to be in awe of the waste heat from engines.
Doug Williams.
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