The raw biomass passes through the reactor by lifting flights inside inner shell of rotary drum. The heating gas flows in gap between inner and outer shell. It is noted that inner and outer shells rotate together when this reactor was operated [21]. This reactor was established in 2011s by Bio Energy Development North AB (SWE). Its capacity was 25,000 – 30,000 tons/year and Atmosclear in 2010s with capacity of 50,000 ton/years [4].