Feasibility Analysis and Carbon Reduction Effect of Biomass Entrained Flow Gasification

In order to realize low-carbon transformation in the energy industry and achieve the "double carbon" goal as scheduled, renewable energy represented by biomass has become increasingly attractive. Biomass gasification is a thermochemical treatment technology, which has seen rapid development in recent years. It is currently the most effective method for high-grade and efficient utilization of biomass energy. In this paper, the key units involved in the entrained flow gasification process, such as pulverization, transportation, and gasification were analyzed, and the feasibility of applying airflow bed technology to biomass gasification was demonstrated. Six typical agricultural and forestry biomasses were used as raw materials. Biomass entrained flow gasification simulation was carried out with the help of the Aspen Plus chemical process simulation software, and the coal and biomass co-gasification and biomass separate gasification processes were characterized. The carbon reduction effect of biomass gasification was analyzed. The results show that when a certain amount of biomass is added into coal, a good gasification performance is retained. With the increase of biomass blending ratio, the specific coal consumption gradually decreases, and the carbon reduction effect is apparent. Compared with traditional fixed bed and fluidized bed gasification, biomass entrained flow gasification has an advantageous calorific value of synthetic gas about 10 MJ/m³. It can be used as a surrogate for natural gas heating, which has economic value in achieving carbon reduction. This study is in line with the dual-carbon policy and also provides a reference for the efficient conversion and utilization of biomass.