A dual-zone, continuous feed tubular reactor is developed to assess the potential for formation of products from incomplete combustion in thermal oxidation of common polymers. Solid polymer (cellulose or polystyrene0 is feed continuously into avolatilization oven where it fragments and vaporizes. The gas-phase polymer fragments flow directly into a second, main flow reactor to undergo further reaction. Temperatures in the main flow reactor are varied independently to observe conditions neededto convert the initial polymer fragments to CO{sub}2 and H{sub}2O. Combustion products are monitored at main reactor temperatures from 400 to 850℃ and at 2.0-s total residence time with four on-line GC/FIDs; polymer reaction products and intermediatesare further identified by GC/MS analysis. Analysis of polymer decomposition fragments at 400℃encompasses complex oxygenated and aromatic hydrocarbon species, which range from high-molecular-weight intermediates of ca. 300 amu, through intermediate massranges down to C{sub}1 and C{sub}2 hydrocarbons, CO, and CO{sub}2. Approximately 41 of these species are positively identified for cellulose and 52 for polystyrene. Products from thermal oxidation of cellulose and polystyrene are shown to achieve complete combustion to CO{sub}2 and H{sub}2O at a main reactor temperature of 850℃ under fuel-lean equivalence ratio and 2.0-s reaction time.
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