title: Chemical looping combustion: A new low-dioxin energy conversion technology.
abstract: Dioxin production is a worldwide concern because of its persistence and carcinogenic, teratogenic, and mutagenic effects. The pyrolysis-chemical looping combustion process of disposing solid waste is an alternative to traditional solid waste incineration developed to reduce the dioxin production. Based on the equilibrium composition of the Deacon reaction, pyrolysis gas oxidized by seven common oxygen carriers, namely, CuO, NiO, CaSO4, CoO, Fe2O3, Mn3O4, and FeTiO3, is studied and compared with the pyrolysis gas directly combusted by air. The result shows that the activity of the Deacon reaction for oxygen carriers is lower than that for air. For four typical oxygen carriers (CuO, NiO, Fe2O3, and FeTiO3), the influences of temperature, pressure, gas composition, and tar on the Deacon reaction are discussed in detail. According to these simulation results, the dioxin production in China, Europe, the United States, and Japan is predicted for solid waste disposal by the pyrolysis-chemical looping combustion process. Thermodynamic analysis results in this paper show that chemical looping combustion can reduce dioxin production in the disposal of solid waste.
authors.affiliation: School of Environment, Tsinghua University, Beijing 100084, China. Electronic address: huaxnchn@163.com.
authors.forename: Xiuning
authors.initials: X
authors.lastname: Hua
authors.affiliation: School of Environment, Tsinghua University, Beijing 100084, China. Electronic address: solid@tsinghua.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
mesh_terms: D000393:Air Pollutants / Q000737:chemistry / Q000302:isolation & purification*; D002713:Chlorine / Q000737:chemistry; D003198:Computer Simulation; D004147:Dioxins / Q000737:chemistry / Q000302:isolation & purification*; D006358:Hot Temperature; D017745:Incineration / Q000379:methods*; D010100:Oxygen / Q000737:chemistry; D011312:Pressure; D012037:Refuse Disposal / Q000379:methods*; D013816:Thermodynamics
chemical_list: D000393:Air Pollutants; D004147:Dioxins; D002713:Chlorine; D010100:Oxygen
keywords: Chemical looping combustion; Deacon reaction; Dioxin; Oxygen carrier; Pyrolysis; Solid waste