Thermal characteristics of bagasse

Abstract

SYNOPSISBagasse is a solid waste that remains after crushing sugarcane. Since bagasse is used as a fuel in sugar mills, characterization of its thermal degradation is rather important in order to use it efficiently. Thermal analysis of bagasse was carried out using differential thermal analysis (DTA) and thermogravimetry (TG) under oxidizing and inert atmospheres. Kinetic studies were based on weight loss obtained from T G analysis. Thermal degradation of bagasse takes place in two stages: volatilization and carbonization. The reaction rate, activation energy, entropy change, enthalpy change, and Gibbs free energy for the two thermal stages were calculated. The results indicated that activation energy for the volatilization stage is higher than that of decarbonization stage, and that both the rate constant and activation energy for combustion are higher than those of pyrolysis.

Biomass pyrolysis kinetics: A comparative critical review with relevant agricultural residue case studies

“…The impact of an oxidative environment versus that of an inert atmosphere upon bagasse pyrolysis was investigated by several research groups [303,387,392,393]. In each case, there was an increase in apparent activation energy when the inert (N 2 ) atmosphere was replaced with an oxidative environment.…”

“…Excluding the extraordinary 1429% increase in E given by Roque-Diaz et al [303], the average increase in E a on the basis of five studies by these four groups was 47% with a standard deviation of 17%. Nassar [298,385,392] conducted his bagasse pyrolysis experiments under two different types of inert atmosphere (N 2 and He). The E a values recorded for pyrolysis under nitrogen were 87.9 kJ mol −1 and 46.7 kJ mol −1 for the low and high temperature regions, respectively, while the corresponding E a values obtained for pyrolysis under helium were 118.1 kJ mol −1 and 69.1 kJ mol −1 , respectively.…”

Bio-oil production by flash pyrolysis of sugarcane residues and post treatments of the aqueous phase

“…Apart from the kinetic studies at the bench scale [18][19][20][21], different technologies have been applied, such as fixed bed reactor [22,23,4], vacuum pyrolyzer [24,25] and rotary drum [22]. According to Bridgwater [26], fluidized beds are the most popular configurations owing to their ease of operation and scale-up.…”

Influence of Electron Beam Irradiation and Coupling Agents on the Thermal Stability of Sugar Cane Bagasse Fiber-Thermoplastics Scrape Composite

“…The last two components represent small fraction of the total weight [27] . The weight loss percent and the rate of loss (da=dt) (differential thermogravimetery) of cane bagasse fibers against temperature increment is shown in Fig.…”

“…Developments of wood flour reinforced composite of a high temperature engineering polymer (polyphenylene ether) with the aid of low molecular weight thermosetting liquid bifunctional epoxy (EPON 828) is very important due to its popularity in automotive industry [26] . Thermal degradation of sugar bagasse using TGA indicates two degradation steps, volatilization and decarbonization; the activation energy for the first is higher than the second [27] . Recent study [6] using TGA technique showed that bagasse fibers treated with silane and grafted with polystyrene and divinyl benzene remarkably increase its hydrophobicity.…”