Polymer Pyrolysis and Oxidation Studies in a Continuous Feed and Flow Reactor: Cellulose and Polystyrene
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- 作者：Byung-Ik Park ; Joseph W. Bozzelli ; Michael R. Booty ; Mary J. Bernhard ; Karel Mesuere ; Charles A. Pettigrew ; Ji-Chun Shi ; and Staci L. Simonich
- 刊名：Environmental Science & Technology
- 出版年：1999
- 出版时间：August 1, 1999
- 年：1999
- 卷：33
- 期：15
- 页码：2584 - 2592
- 全文大小：122K
- 年卷期：v.33,no.15(August 1, 1999)
- ISSN：1520-5851
文摘
A dual-zone, continuous feed tubular reactor is developedto assess the potential for formation of products fromincomplete combustion in thermal oxidation of commonpolymers. Solid polymer (cellulose or polystyrene) is fedcontinuously into a volatilization oven where it fragments andvaporizes. The gas-phase polymer fragments flow directlyinto a second, main flow reactor to undergo furtherreaction. Temperatures in the main flow reactor are variedindependently to observe conditions needed to convertthe initial polymer fragments to CO2 and H2O. Combustionproducts are monitored at main reactor temperaturesfrom 400 to 850 
C and at 2.0-s total residence time withfour on-line GC/FIDs; polymer reaction products andintermediates are further identified by GC/MS analysis.Analysis of polymer decomposition fragments at 400 Cencompasses complex oxygenated and aromatic hydrocarbonspecies, which range from high-molecular-weightintermediates of ca. 300 amu, through intermediate massranges down to C1 and C2 hydrocarbons, CO, and CO2.Approximately 41 of these species are positively identifiedfor cellulose and 52 for polystyrene. Products fromthermal oxidation of cellulose and polystyrene are shownto achieve complete combustion to CO2 and H2O at amain reactor temperature of 850 C under fuel-leanequivalence ratio and 2.0-s reaction time.
C and at 2.0-s total residence time withfour on-line GC/FIDs; polymer reaction products andintermediates are further identified by GC/MS analysis.Analysis of polymer decomposition fragments at 400 Cencompasses complex oxygenated and aromatic hydrocarbonspecies, which range from high-molecular-weightintermediates of ca. 300 amu, through intermediate massranges down to C1 and C2 hydrocarbons, CO, and CO2.Approximately 41 of these species are positively identifiedfor cellulose and 52 for polystyrene. Products fromthermal oxidation of cellulose and polystyrene are shownto achieve complete combustion to CO2 and H2O at amain reactor temperature of 850 C under fuel-leanequivalence ratio and 2.0-s reaction time.