The comparisons of experimental results between Runs 1 and 2 (twostage
gasifier) and between Runs 3 and 6 (three-stage gasifier)
would reveal the role of activated carbon for tar removal. The
comparisons between Runs 1 and 3 and between Runs 2 and 6
would show the performance of the three-stage gasifier in tar
removal. For evaluating the performance of a gasifier