Journal
FUEL
Volume 85, Issue 7-8, Pages 1125-1130Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2005.10.010
Keywords
biofuels; co-combustion; deposition; entrained flow reactor
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Specified mixtures of peat with bark and peat with straw were burned in a lab-scale entrained flow reactor that simulates conditions in the superheater region of a conventional biomass-fired boiler. The deposition rates were recorded on an air-cooled probe that was inserted into the reactor at the outlet. For both mixtures, the deposition behaviour followed a non-linear pattern, which suggests that physico-chemical interaction between the types of ash has taken place. Peat seems to act as a cleansing agent in all mixtures with straw, while it acts as a cleansing agent in mixtures with bark only up to a share of 50 wt% bark. Between 50 and 100 wt% bark, it seems that peat adds to the deposition. The results indicate that it is possible to burn up to 30 wt% bark (renewable biofuel and pulp mill waste) and up to 70 wt% straw (renewable biofuel and agricultural waste) in mixtures with peat (CO2-neutral fossil fuel) without encountering increased deposition rates. (c) 2005 Elsevier Ltd. All rights reserved.
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