Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
Volume 16, Issue 7, Pages 2989-3000Publisher
SPRINGER
DOI: 10.1007/s13762-018-1864-y
Keywords
Ash melting behaviour; Biomass co-firing; Design of experiments; Slagging hazard determination
Categories
Funding
- Ministry of Science and Higher Education under the Iuventus Plus Program for 2015-2016 [IP2014 041073]
- European Institute of Innovation and Technology (EIT), the body of the European Union's Horizon 2020 Research and Innovation Programme, Project: BIOCOAL FOR POWER GENERATION (BIOPOGEN) [07_2013_IP57_BIOPOGEN]
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This study presents research that was conducted to determine the impact of biomass chemical composition on the characteristic ash melting behaviour of a biomass-coal blend made for use in the co-firing of power plants. It was conducted using two different types of biomass: wood biomasspine (Pinus sylvestris L.) residue from sawmill, and agrarian biomassmiscanthus (Miscanthus giganteus). The design-of-experiments matrix was prepared using the simplex-lattice design method with four independent variables (i.e. coal A and B and biomass A and B). The characteristic melting points of ash (ash fusibility temperatures, i.e. the sintering, softening, melting and flowing temperatures) were used as the dependent variables, which were analysed under two atmospheres (e.g. oxidative and reductive). The analysis of the ash fusibility temperatures in oxidized and reduced atmospheres was conducted under accredited standards and test procedures using a PR-25/1750 furnace that was capable of reaching a maximum temperature of 1650 degrees C at a heating rate of 30Kmin(-1) to 1200 degrees C and 10Kmin(-1) between 1200 and 1650 degrees C, which provided an adequate zone of uniform temperature. In addition to the analyses of the ash melting point, full characterization of the physico-chemical properties of the applied fuels and their mixtures was performed. Based on the results of these analyses, the ash deposit behaviour was calculated, and its impact was discussed.
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