title: Thermal characterization and syngas production from the pyrolysis of biophysical dried and traditional thermal dried sewage sludge.
abstract: A novel method for energy recycling from sewage sludge was developed through biophysical drying coupled with fast pyrolysis. Thermal decomposition properties of biophysical-dried sludge (BDS) and thermal-dried sludge (TDS) were characterized through thermogravimetric (TG) coupled with mass spectrometry (MS) analysis. BDS exhibited typical peaks in each differential thermogravimetric (DTG) region and presented slower mass loss rates in H, C, and L regions (180-550°C) but remarkable weight loss in region I (>550°C) compared with TDS. The charring process centered at region I, was responsible for the prominent H2 emission from BDS. The pseudo multicomponent model showed that the Em values of BDS and TDS were 48.84 and 37.75 kJ/mol, respectively. Furthermore, fast pyrolysis of BDS was proven to facilitate syngas and char formation more than TDS. For the yielded syngas, the thermal conversion of BDS was characterized by high H2 and CH4 content beyond 700°C.
authors.affiliation: School of Environmental Science and Engineering, Chang'an University, Xi'an 710064, China; Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province, Xi'an 710064, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Han
authors.affiliation: Xinjiang Academy of Environmental Protection Science, Urumqi 830011, China.
authors.forename: Chenxi
authors.initials: C
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province, Xi'an 710064, China.
authors.forename: Jinwen
authors.initials: J
authors.lastname: Liu
authors.affiliation: School of Environmental Science and Engineering, Chang'an University, Xi'an 710064, China; Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province, Xi'an 710064, China.
authors.forename: Aixia
authors.initials: A
authors.lastname: Chen
authors.affiliation: School of Environment, Tsinghua University, Beijing 100084, China. Electronic address: htwang@tsinghua.edu.cn.
authors.forename: Hongtao
authors.initials: H
authors.lastname: Wang
mesh_terms: D013058:Mass Spectrometry; D012722:Sewage / Q000737:chemistry*; D018505:Waste Management
chemical_list: D012722:Sewage
keywords: Biophysical-dried sludge; Fast pyrolysis; Thermal decomposition property; Thermal-dried sludge