title: Potential method for gas production: high temperature co-pyrolysis of lignite and sewage sludge with vacuum reactor and long contact time.
abstract: Lignite and sewage sludge were co-pyrolyzed in a vacuum reactor with high temperature (900°C) and long contact time (more than 2h). Beneficial synergetic effect on gas yield was clearly observed. Gas yield of blend fuel was evidently higher than that of both parent fuels. The gas volume yield, gas lower heating value (LHV), fixed carbon conversion and H2/CO ratio were 1.42 Nm(3)/kg(blend fuel), 10.57 MJ/Nm(3), 96.64% and 0.88% respectively, which indicated this new method a feasible one for gas production. It was possible that sewage sludge acted as gasification agents (CO2 and H2O) and catalyst (alkali and alkaline earth metals) provider during co-pyrolysis, promoting CO2-char and H2O-char gasification which, as a result, invited the improvement of gas volume yield, gas lower heating value and fixed carbon conversion.
authors.affiliation: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Yang
authors.affiliation: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
authors.forename: Chengyong
authors.initials: C
authors.lastname: Yuan
authors.affiliation: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China. Electronic address: xujiaohh@163.com.
authors.forename: Jiao
authors.initials: J
authors.lastname: Xu
authors.affiliation: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
authors.forename: Weijiang
authors.initials: W
authors.lastname: Zhang
mesh_terms: D001709:Biotechnology / Q000295:instrumentation* / Q000379:methods*; D002606:Charcoal; D003031:Coal / Q000032:analysis*; D005740:Gases / Q000138:chemical synthesis*; D006358:Hot Temperature; D012722:Sewage / Q000737:chemistry*; D013997:Time Factors; D014618:Vacuum
chemical_list: D003031:Coal; D005740:Gases; D012722:Sewage; D002606:Charcoal
keywords: Co-pyrolysis; Gas production; Lignite; Sewage sludge; Synergetic effect