Air gasification of mixed plastic wastes using calcined dolomite and activated carbon in a two-stage gasifier to reduce tar

► Stable gasification of mixed plastic wastes was conducted in a two-stage gasifier. ► Strong tar removal was achieved with the combination of activated carbon and dolomite. ► Increasing amount of activated carbon resulted in less tar and high hydrogen production. ► Chlorine in feed material was mainly transferred to char or captured by activated carbon.