title: Effects of carbonization and solvent-extraction on change in fuel characteristics of sewage sludge.
abstract: Urban sewage sludge was carbonized at 300-500°C for 1h, and combustible components were extracted through the solvent-extraction process. N-methyl-2-pyrrolidinone (NMP) was used as the solvent for extraction, and the extraction temperature was fixed at 360°C. The atomic ratios of the solvent-extracted sludge of CS300 (ECS300) were shown to be 1.04 for H/C and 0.11 for O/C, which represented the characteristics of its coal band. Thus, its coal band was similar to that of a high-rank fuel such as bituminous coal. FT-IR analysis showed that the absorbance band of ECS300 was considerably different from that of dried sludge (RS) or the carbonized sludge at 300°C (CS300) but similar to that of coal, although the ash content absorbance band of 800-1200 cm(-1) was of very low intensity. The combustion profile showed that combustion of ESC300 occurred at a temperature higher than the ignition temperature (T(i)) or maximum weight loss rate (DTG(max)) of coal.
authors.affiliation: Department of Environmental Engineering, Hanbat National University, Daejeon 305-719, Republic of Korea. bigsw21@gmail.com
authors.forename: Sang-Woo
authors.initials: SW
authors.lastname: Park
authors.forename: Cheol-Hyeon
authors.initials: CH
authors.lastname: Jang
mesh_terms: D002244:Carbon / Q000737:chemistry*; D012722:Sewage; D012997:Solvents / Q000737:chemistry*
chemical_list: D012722:Sewage; D012997:Solvents; D002244:Carbon