Sugarcane Bagasse Torrefaction for Fluidized Bed Gasification

Abstract

Sugarcane bagasse has a great potential to be used as biofuel; however, its use as feedstock in fluidized bed reactors is hampered due to its fibrous nature, low apparent density, high moisture content, and difficulties with its fluidization. The present study evaluated the torrefaction of sugarcane bagasse to propose suitable process conditions that balance the properties of the fuel obtained in the torrefaction and the process’s energy requirements. Based on the thermogravimetric analysis and previous reports, two final process temperatures (230 °C and 280 °C) and residence times (35 and 45 min) for the same heating rate (5 °C/min) and nitrogen flow (1 L/min) were evaluated. Within the experimental conditions evaluated, it can be concluded that for 30 min of residence time, the average target temperature of 230 °C should be high enough to produce a stable torrefacted bagasse with a 3.41% reduction in the volatile content and obtain 98.85% of energy yield. Higher temperatures increase the feedstock’s carbon content and energy density, but the reduction in energy yield and the fraction of volatiles do not justify higher temperatures or longer residence times for pretreating the sugarcane bagasse.

Proxy quality control of biomass particles using thermogravimetric analysis and Gaussian process regression models

“…Torrefaction conditions of biomass conversion are based largely upon the degradation of hemicellulose from 225 to 325 °C. [2][3][4] The heating rate varied from 5 to 30 °C/min, based on reasonable biomass torrefaction and slow pyrolysis reactors; [31][32][33] maximum temperature and heat rate were selected as previously identified components for optimizing biomass products. 34,35…”

Improving Lignocellulosic and Non-Lignocellulosic Biomass Characteristics through Torrefaction Process

“…Similarly, Chang et al [48] studied the torrefaction of oil palm solid waste by Fourier transform infrared spectroscopy (FTIR) analysis. Torrefaction efficiency was analyzed during the process of sugarcane bagasse [55,56]. Chen et al [57] researched the impact of the torrefaction process of sewage sludge that contains the element mercury (Hg) in the sample on the environment.…”