Dear Stovers, fuel in the form of a combustible gas seems to be a pre-requisite for an internal combustion engine. Even liquid fuels are atomised before introducing them into the cylinder of an i.c.engine. Wood gasifies when heated, but this gas is used in internal combustion engines only after filtering out the tar. Why is it necessary to filter out the tar? Tar is combustible and it is gaseous if the temperature is high. Stoves which provide secondary air with the help of a fan have shown that the wood gas can be completely burned, along with the tar, if enough air is provided to it. So why filter out the tar before using wood gas in an i.c.engine? Yours A.D.Karve
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