LAUSR

T he co -co mbustion characteristics and kinetics of torrefied sugarcane bagasse (TB) , lignite (L) , and their blended samples were experimentally investigated using thermogravimetric analysis (TGA) and derivative thermogravimetry (DTG) based on the Coat s- Redfern method for kinetic estimatio n. Their physicochemical properties were also investigate d. Raw bagasse was thermally treated in a laboratory - scale torrefactor at 275 °C with a torrefaction time of 60 min under an inert nitrogen environmen t. Then, the torrefied bagasse was blended with Thai lignite as a co-f uel at ratios of 5 0: 50 (TB50L50) , 7 0;30 (T B70L3 0) , and 9 0:10 (T B90L1 0) , respectivel y.  Torrefaction improved the fuel properties and heating value of the raw bagasse as well as reducing the O / C and H/C ratio s. In addition, the blending of torrefied bagasse with lignite improved the combustion behavio r. The TGA and DTG results indicated that the ignition and burnout temperatures stepped downwards with different increasing ratios of torrefied bagass e. The co - combustion behavior at the maximum burning rate showed that the burnout temperatures of TB50L50, TB70L30, and TB90L10 were 532, 529, and 528 °C, respectively, indicating a slight decrease with an increasing torrefied bagasse blending rati o. These results were sufficient to provide comprehensive guidelines in terms of the design and operation of the combustion system for adding torrefied bagasse into the co-f iring proces s.