Title of article :
An experimental analysis on property and structure variations of agricultural wastes undergoing torrefaction
Author/Authors :
Chen، نويسنده , , Wei-Hsin and Lu، نويسنده , , Ke-Miao and Tsai، نويسنده , , Chi-Ming، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
8
From page :
318
To page :
325
Abstract :
Three agricultural wastes, consisting of coffee residue, sawdust and rice husk, undergoing torrefaction are investigated to evaluate the potential of biomass as solid fuel. Two different torrefaction temperatures (240 and 270 °C) and durations (0.5 and 1 h) are considered in the study, and the properties and structures of the raw and torrefied wastes are extensively investigated by means of proximate, elemental, fiber, calorific, thermogravimetric, SEM and FTIR analyses. A high-volatile bituminous coal and a low-volatile one are also regarded for comparison. By virtue of more hemicellulose contained in the coffee residue, it is the most active biomass to torrefaction and its higher heating value (HHV) is improved up to 38%. The empirical atomic formula of the raw wastes is expressed by CH1.54–1.76O0.65–0.89 and it changes to CH1.02–1.57O0.26–0.64 after undergoing torrefaction. The torrefied biomasses approach high-volatile coal when the torrefaction temperature and duration increase. From fuel point of view, the improved properties and changed molecular structure are conducive to the applications of biomass in industrial furnaces such as boilers and blast furnaces.
Keywords :
Empirical atomic formula , Torrefaction and pretreatment , Energy yield , Boilers and blast furnaces , Molecular formula , Agricultural waste and coal
Journal title :
Applied Energy
Serial Year :
2012
Journal title :
Applied Energy
Record number :
1605039
Link To Document :
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