EUBCE 2024 - Jiyeon PARK - Behavioral Changes of Alkali Metal Components in Bagasse by Co-Combustion of Bagasse Biomass and Aluminosilicate-Based Fuel Additive

Behavioral Changes of Alkali Metal Components in Bagasse by Co-Combustion of Bagasse Biomass and Aluminosilicate-Based Fuel Additive

Short Introductive summary

The combustion of biomasses causes the formation of chloride compounds through reactions with alkali components inherent in the biomass, resulting in contamination and corrosion of a combustor or boiler. This study used an aluminosilicate-based fuel additive to reduce the tendencies of corrosion and contamination of a biomass combustor or boiler by changing the behavior of alkali components. The aluminosilicate-based fuel additive reacted with alkali components in bagasse, forming compounds, such as kalsilite, microline, and lomonosovite, having higher melting points than the ash compounds formed by solely bagasse combustion. Alkali chloride was reduced to 37.8%, and the melting point of the initial deformation temperature improved to 38.9%. At the optimal condition of 7% of the fuel additive mixing co-combustion, the tendencies of fouling, slagging viscosity, and bed agglomeration formation decreased 18.33%, 37.57%, and 80%, respectively. Furthermore, the base and acid ratio index, representing the risk of slagging, exhibited 26.67% reduced tendency. Ultimately, these will reduce the possibility of corrosion of biomass boilers and combustors.

J.Y. Park, Korea Institute of ceramic engineering&technology, Cheongju-si, REPUBLIC OF KOREA
B.I. Sang, Chemical Engineering Department, Seoul, REPUBLIC OF KOREA
J.H. Lee, Korea Institute of ceramic engineering&technology, Cheongju-si, REPUBLIC OF KOREA