Abstract
During biomass combustion, alkali metals are partly released to the gas phase and form low melting point compound, which may enrich to the heat exchangers and cause heavy sinters in the incinerator. The aim of this study is to obtain quantitative data on the migration of sodium by measuring the content of sodium remained in the combustion products using AAS. Three groups of biomass ashes were produced respectively to investigate the influence of combustion temperature, fuel thickness and kaolin addition. The results indicate that, rising temperature enhances Na release from the biomass to the gas phase, while increasing the fuel thickness does the opposite. The reaction of kaolin and Na to generate a high melting point material inhibits the migration of Na, which reduces the biomass sintering in the incinerator.
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