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Time-resolved measurements of pyrolysis and combustion products of PMMA
We studied transient chemical speciation during high-temperature solid material pyrolysis and combustion in air. Our objective was to develop a database of chemical burn signatures. The material tested was the thermoplastic PMMA (polymethylmethacrylate). Material samples were heated in an infrared furnace until they pyrolysed, ignited, and combusted in air. Time-resolved quantitative measurements of the exhaust species CO2, O2, hydrocarbons, and CO along with exhaust gas temperature were obtained. Two categories of experiments were conducted: (1) pyrolysis tests in which there was no combustion; (2) combustion tests with chemical reaction and heat release. During heating, the sample underwent numerous processes that appear as diagnostic sequences. In the pyrolysis tests, as the furnace temperature was raised, the CO and HC (hydrocarbon) signals underwent transition from one peak to two peaks. In the combustion tests, spontaneous ignition occurred at higher test temperatures as evidenced by an exothermic reaction reported by the thermocouples, leading to three-peak CO and HC profiles. The measured O2/CO2 ratio of 1.3 ± 0.1 agreed with stoichiometric methyl-methacrylate monomer decomposition. Calculations of the power output using two independent methods supported (1) that combustion was experimentally observed in the furnace, and (2) the accuracy of the combustion gas analysis.
Time-resolved measurements of pyrolysis and combustion products of PMMA
We studied transient chemical speciation during high-temperature solid material pyrolysis and combustion in air. Our objective was to develop a database of chemical burn signatures. The material tested was the thermoplastic PMMA (polymethylmethacrylate). Material samples were heated in an infrared furnace until they pyrolysed, ignited, and combusted in air. Time-resolved quantitative measurements of the exhaust species CO2, O2, hydrocarbons, and CO along with exhaust gas temperature were obtained. Two categories of experiments were conducted: (1) pyrolysis tests in which there was no combustion; (2) combustion tests with chemical reaction and heat release. During heating, the sample underwent numerous processes that appear as diagnostic sequences. In the pyrolysis tests, as the furnace temperature was raised, the CO and HC (hydrocarbon) signals underwent transition from one peak to two peaks. In the combustion tests, spontaneous ignition occurred at higher test temperatures as evidenced by an exothermic reaction reported by the thermocouples, leading to three-peak CO and HC profiles. The measured O2/CO2 ratio of 1.3 ± 0.1 agreed with stoichiometric methyl-methacrylate monomer decomposition. Calculations of the power output using two independent methods supported (1) that combustion was experimentally observed in the furnace, and (2) the accuracy of the combustion gas analysis.
Time-resolved measurements of pyrolysis and combustion products of PMMA
Ghosh, Ruby N. (author) / Wichman, Indrek S. (author) / Kramer, Cory A. (author) / Loloee, Reza (author)
Fire and Materials ; 37 ; 280-296
2013
17 Seiten, 13 Bilder, 5 Tabellen, 15 Quellen
Article (Journal)
English
Time-resolved measurements of pyrolysis and combustion products of PMMA
| British Library Online Contents | 2013
Time‐resolved measurements of pyrolysis and combustion products of PMMA
| Online Contents | 2013
Introducing StrobeLock, for time-resolved measurements
British Library Online Contents | 2013