The continuous grow of world population has led to a substantial increase in energy demand. On the other hand, it has given rise to generating large amounts of wastes, which need to be disposed of without any damage to the environment. Such scenario has led to the idea of studying the application of gasification technology to mixtures of coal and wastes. The results obtained so far are encouraging, as they have shown that it is possible to co-gasify coal mixed with either pine or polyethylene wastes to values up to 40% (w/w) of wastes, being even possible to substitute one waste type by the other, whenever their availability are seasonal affected. However, the presence of PE wastes favoured the release of hydrocarbons, which may be reduced by either an increase in gasification temperature or in air flow.

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