Journal
BIORESOURCE TECHNOLOGY
Volume 161, Issue -, Pages 333-339Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.03.090
Keywords
Torrefaction and carbonization; Biomass and biochar; Burnout and ignition; Pulverized coal injection (PCI); Blast furnace
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To evaluate the utility potential of pretreated biomass in blast furnaces, the fuel properties, including fuel ratio, ignition temperature, and burnout, of bamboo, oil palm, rice husk, sugarcane bagasse, and Madagascar almond undergoing torrefaction and carbonization in a rotary furnace are analyzed and compared to those of a high-volatile coal and a low-volatile one used in pulverized coal injection (PCI). The energy densities of bamboo and Madagascar almond are improved drastically from carbonization, whereas the increase in the calorific value of rice husk from the pretreatment is not obvious. Intensifying pretreatment extent significantly increases the fuel ratio and ignition temperature of biomass, but decreases burnout. The fuel properties of pretreated biomass materials are superior to those of the low-volatile coal. For biomass torrefied at 300 degrees C or carbonized at temperatures below 500 degrees C, the pretreated biomass can be blended with coals for PCI. (C) 2014 Elsevier Ltd. All rights reserved.
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