title: Pretreatment of biomass by torrefaction and carbonization for coal blend used in pulverized coal injection.
abstract: 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°C or carbonized at temperatures below 500°C, the pretreated biomass can be blended with coals for PCI.
authors.affiliation: Iron and Steel Research and Development Department, China Steel Corporation, Kaohsiung 812, Taiwan, ROC.
authors.forename: Shan-Wen
authors.initials: SW
authors.lastname: Du
authors.affiliation: Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan, ROC. Electronic address: weihsinchen@gmail.com.
authors.forename: Wei-Hsin
authors.initials: WH
authors.lastname: Chen
authors.affiliation: Department of Chemical Engineering, University of Newcastle, Newcastle, Australia.
authors.forename: John A
authors.initials: JA
authors.lastname: Lucas
mesh_terms: D018533:Biomass; D002606:Charcoal / Q000737:chemistry*; D003031:Coal; D019684:Magnoliopsida / Q000737:chemistry*
chemical_list: D003031:Coal; D002606:Charcoal
keywords: Biomass and biochar; Blast furnace; Burnout and ignition; Pulverized coal injection (PCI); Torrefaction and carbonization