Effects of Sorbents on the Partitioning and Speciation of Cu During Municipal Solid Waste Incineration

doi:10.1016/j.cjche.2014.09.030

摘要/Abstract

摘要： Oxides of silicon, aluminium and calcium are normally dominant minerals during municipal solid waste (MSW) combustion. In flue gas, SiO₂, Al₂O₃ and CaO all act as sorbents capturing heavy metals (and semi-volatile organics). To further understand the effect of sorbents during MSW combustion, the effects of SiO₂, Al₂O₃ and CaO on Cu partitioning were experimentally investigated by the combustion of synthetic MSW in a tubular furnace and their effects on Cu speciation were studied by thermodynamic equilibrium calculations using ChemKin software. The experiments show that CaO has the highest Cu sorption efficiency at 900 ℃, followed by Al₂O₃ and SiO₂. Thermodynamic equilibrium calculations show that for Cu the addition of SiO₂ and Al₂O₃ reduces the amount of liquid CuCl, which is more volatile. However, the addition of CaO has little influence on chemical sorption of Cu, indicating that the sorption of CaO is resulted from physical sorption.

关键词: Municipal solid waste, Sorbent, Heavy metal, Tubular furnace, Thermodynamic equilibrium calculation

Abstract: Oxides of silicon, aluminium and calcium are normally dominant minerals during municipal solid waste (MSW) combustion. In flue gas, SiO₂, Al₂O₃ and CaO all act as sorbents capturing heavy metals (and semi-volatile organics). To further understand the effect of sorbents during MSW combustion, the effects of SiO₂, Al₂O₃ and CaO on Cu partitioning were experimentally investigated by the combustion of synthetic MSW in a tubular furnace and their effects on Cu speciation were studied by thermodynamic equilibrium calculations using ChemKin software. The experiments show that CaO has the highest Cu sorption efficiency at 900 ℃, followed by Al₂O₃ and SiO₂. Thermodynamic equilibrium calculations show that for Cu the addition of SiO₂ and Al₂O₃ reduces the amount of liquid CuCl, which is more volatile. However, the addition of CaO has little influence on chemical sorption of Cu, indicating that the sorption of CaO is resulted from physical sorption.

Key words: Municipal solid waste, Sorbent, Heavy metal, Tubular furnace, Thermodynamic equilibrium calculation

Hui Zhou, Jin Sun, Aihong Meng, Qinghai Li, Yanguo Zhang . Effects of Sorbents on the Partitioning and Speciation of Cu During Municipal Solid Waste Incineration[J]. , 2014, 22(11/12): 1347-1351.

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