The existence of tar—a byproduct of coal gasification reduces the utilization value of gasifyed fuel gas. The affecting factors upon tar splitting decomposition

including kind of catalyzers

temperature of reaction

and time of retention etc.

have been presented. Study shows that: the catalyzer has very big promoting effect for tar splitting decomposition; the temperature raising is beneficial for tar’s splitting decomposition reaction; increase of contact time is advantageous to reducing quantity of tar formation.