Fuels and Combustion
Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its

All of these
Flue gas has lower dew point thereby facilitating more waste heat recovery
Sulphur content is lower
Emissivity factor is higher

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Fuels and Combustion
Producer gas containing least amount of tar is produced by the

High pressure gasification of coal (e.g. in Lurgi gasifier)
Partial combustion of large size (< 50 mm) coke
Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier)
Partial combustion of coal

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