Journal
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
Volume 37, Issue 6, Pages 2100-2108Publisher
WILEY
DOI: 10.1002/ep.12871
Keywords
bamboo; coal; carbonization; grindability; torrefaction
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Funding
- NRF (National Research Foundation)
- SARChl Clean Coal Technology
- University of the Witwatersrand
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Different ages of Bambusa balcooa (bamboo) were treated and tested for grindability and combustion behavior in support of a co-firing research program. The bamboo samples (1, 3, and 4+ years old) were subjected to thermal pre-treatment methods, that is, torrefaction at 250 and 280 degrees C and low temperature carbonization at 350 and 400 degrees C to improve their combustion and physicochemical properties. The grindability of bamboo was improved by thermal treatment, indicated by an increase in HGI value. In all bamboo samples (1, 3, and 4+ years old), the grindability was found to be easier as the treatment temperature increased. The raw bamboo samples exhibited calorific values ranging from 17 to 18 MJ/kg and these increased to 25-30 MJ/kg, by torrefaction and carbonization. Both raw and thermally treated bamboo had higher reactivities, and lower ignition and burnout temperatures compared with that for coal during combustion. The carbonized 4-year-old bamboo forms appear to be more suited to, and possibly the preferred alternative source of fuel for, firing alone or co-fired with coal in pulverized coal boilers such as those used in large scale power generation in South Africa. (c) 2018 American Institute of Chemical Engineers Environ Prog, 37: 1901-1907, 2018
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