Alkalis in alternative biofuels

作者: Thomas R Miles , Thomas R Miles Jr , Richard W Bryers , Larry L Baxter , Bryan M Jenkins

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摘要: The alkali content of annually produced biofuels severely limits their use for energy. When fired in conventional boilers the reacts with other inorganic elements to agglomerate fluidized beds, forms slag on grates and creates flyash that sticks refractory deposits convection surfaces. This paper describes results from a cooperative project between biomass industry National Renewable Energy Laboratory investigate extent nature these look potential solutions. chemistry firing characteristics more than 26 fuels were investigated laboratory full scale industrial tests. Many different analytical methods used characterize deposits. Urban wood fuels, agricultural residues, energy crops included database. Effects are described which may influence fuel selection boiler operation. While transformation inorganics mechanisms deposit information can be explained, some high will require special furnace designs.

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