Journal
BIORESOURCE TECHNOLOGY
Volume 172, Issue -, Pages 438-443Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.09.016
Keywords
Optimization; Torrefaction; Biomass; Gain and Loss; Regression analysis
Funding
- Priority Research Centers Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2010-002141]
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In this study, the optimal conditions for biomass torrefaction were determined by comparing the gain of energy content to the weight loss of biomass from the final products. Torrefaction experiments were performed at temperatures ranging from 220 to 280 degrees C using 20-80 min reaction times. Polynomial regression models ranging from the 1st to the 3rd order were used to determine a relationship between the severity factor (SF) and calorific value or weight loss. The intersection of two regression models for calorific value and weight loss was determined and assumed to be the optimized SF. The optimized SFs on each biomass ranged from 6.056 to 6.372. Optimized torrefaction conditions were determined at various reaction times of 15, 30, and 60 min. The average optimized temperature was 248.55 degrees C in the studied biomass when torrefaction was performed for 60 min. (C) 2014 Elsevier Ltd. All rights reserved.
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