I'm curious about the effects of trying to achieve the multiple
objectives of char production and producer gas. One combustion engineer
I've spoken to who has done a lot of work in gasification stated that
from his perspective char was a sign of an inefficient gasification
process. If the inefficiency is just a reduced yield of producer gas
then this might be OK for a particular application. But if the
inefficiency results in a gas that needs more filtering/volume this may
adversely affect the economics.
I haven't found any mixed char and producer gas systems in operation
that meet Knoef's commercial criteria which makes me wonder if detuning
the gasification in favour of char does affect the quality of the gas.
Is anyone aware of mixed char and producer gas systems in operation that
meet Knoef's criteria? Perhaps a good paper that summarises the producer
gas characteristics over a range of char manufacturing percentage?
Thanks
David
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