模化城市生活垃圾衍生燃料制备及热解特性的研究

On the basis of total survey on the composition of municipal solid waste (MSW) in China, a formulation was determined for preparation of an artificial refuse derived fuel (aRDF) with the aim both to represent the typical specifications of MSW and to reproduce it easily. Hence, when the aRDF was used in some investigations, the results would be of significance and comparability. An aRDF was synthesized in this way in this paper. Then it was investigated by proximate/ultimate analysis and by TG-FTIR techniques. It is demonstrated that the aRDF well “duplicates” the typical composition and characterization of MSW in China. The results show that during pyrolysis under controlled condition the HCl evolves and aromatic compounds occur at different temperature ranges, which strongly suggests that the formation of polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans (PCDD/Fs) be partly or even completely prevented when gases from different temperature zones in heat treatment apparatus are separately utilized. It is obvious that only Cl source and dioxin precursors (mainly aromatic compounds) appear simultaneously can PCDD/Fs be synthesized. Besides, aRDF pyrolysis can be described as the first order reaction and their activation energies calculated by Freeman-Carroll method fall into the range of 64.6 kJ/mol～136 kJ/mol.