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- W2076406052 abstract "Abstract The combustion characteristics of PVC (a chlorinated polymer) and poly (ethylene) (PE) (the non-chlorinated counterpart of PVC) were studied at conditions pertinent to municipal waste incinerators i.e., ambient temperatures in the range of 1050–1400 K and heating rates in the order of 10,000 K/s, in air. Spherical or quasi-spherical particles in the range of 90–250 μm in diameter were used. A three-color near infrared-pyrometer and a high speed cinematographic camera were used to simultaneously monitor the complete combustion of single particles, during their free flight in an electrically-heated drop-tube furnace. In contrast to PVC particles, which burned with large, yellow and very bright envelope flames, PE particles experienced longer ignition delays and burned with faint and bluish flames. Despite their shorter ignition delays, PVC particles experienced higher mass loss prior to ignition (at least 55%) as attested by their lower terminal velocities. Upon extinction of the volatile flames a lengthy char combustion period was observed in the case of PVC only. Flame/char temperatures were measured to range between 1800–2500 K. At any given ambient temperature, the burning times of both PVC and PE particles were found to increase almost linearly with the particle size. While higher ambient temperatures resulted in shorter combustion times for the PE particles as expected, the opposite was true for PVC particles. The irregular behavior of PVC was thought to be due to the high concentration of chlorine in the volatiles that escaped initially. Time integrated spatially-average soot volume fractions during burnout of PVC particles were found to be 30–60 ppm and 15–30ppm for particles that burned at 1250 K. and 1400, respectively, while for PE were an order of magnitude lower. Fluctuations in the calculated instantaneous spatially-average soot volume fraction profiles in the flame of PVC suggested temporal evolution of species of different sooting tendencies. This was supported qualitatively by TGA experiments where three distinctive pyrolysis steps were detected during gasification of PVC, but only one for PE." @default.
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- W2076406052 date "1996-01-01" @default.
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- W2076406052 title "Observations on the Combustion of Pulverized PVC and Poly(ethylene)" @default.
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- W2076406052 doi "https://doi.org/10.1080/00102209608951952" @default.
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