Co-gasification Reactivity of Coal and Woody Biomass in High-Temperature Gasification

While biomass has been co-fired at pulverized coal boilers in power stations for it high-efficiency use of biomass, there have been few reports on the co-gasification using entrained flow gasifiers, which are adopted for the major integrated gasification combined cycle plants, In this work, two bituminous coals, cedar bark, and the mixtures of coal and cedar bark were gasified with carbon dioxide at high temperature using it drop tube furnace, As it result, distinguished synergy between coal and cedar bark to improve their gasification reactivity was not observed through the high-temperature co-gasification. The product yields during the co-pyrolysis in nitrogen gas at high temperature agreed with the equilibrium yields, and the char reactivity of the mixtures of coal and biomass was almost the same its that of single coals at the high-temperature gasification. In the case of low-temperature gasification. however, a little improvement of the char gasification reactivity of the mixtures was found because of the catalysis of alkaline and alkaline-earth metal species in biomass.