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000992259 0247_ $$2datacite_doi$$a10.18154/RWTH-2024-08099
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000992259 1001_ $$0P:(DE-82)IDM00633$$aPielsticker, Stefan$$b0$$urwth
000992259 245__ $$aExperimental determination of quantitative yields from polymethyl methacrylate (PMMA) flash pyrolysis in a fluidized bed reactor via online FTIR gas analysis – Supplementary dataset$$honline
000992259 260__ $$c2025
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000992259 520__ $$aChemical recycling processes, such as pyrolysis, have the potential to break down the polymer (e.g., polymethyl methacrylate, PMMA) into its main building blocks (monomers), and thus enable to preserve the full functionality in closed-loop recycling processes. In this study, products from flash pyrolysis of PMMA are quantitatively determined using an ex-situ exhaust gas analysis by means of Fourier-transform infrared (FTIR) spectroscopy. To achieve this, the FTIR is additionally calibrated for methyl methacrylate (MMA) with an MMA/N2 mixture of various concentrations. Flash pyrolysis conditions (heating rates of approximately 1000 K/s are realized with a small-scale fluidized bed reactor operated with a nitrogen atmosphere and temperatures between 573 and 873 K with a continuous feed of PMMA granules. The experiments reveal MMA yields up to 90 % at 673 K. With increasing temperature, the MMA yield drops to approximately 50 % at 873 K. In return, the yields of the MMA decomposition products such as carbon dioxide (CO2), methane (CH4), carbon monoxide (CO), propylene (C3H6), and formaldehyde (CH2O) increase. The approximated residence time of 20 to 30 seconds leads to a stronger decomposition of the MMA into its fragments (especially at higher temperatures) than in other studies, which can be well modeled with a single first-order decomposition mechanism. A detailed analysis of captured condensate reveals a high purity of MMA, which enables the feedback into the polymerization process.
000992259 536__ $$0G:(GEPRIS)240954932$$aDFG project G:(GEPRIS)240954932 - Experimentelle Untersuchung von Pyrolyse- und Koksumsatzkinetiken in einem „Well-Stirred-Reactor“ unter atmosphärischen und druckbeaufschlagten Bedingungen (A01) (240954932)$$c240954932$$x0
000992259 536__ $$0G:(GEPRIS)215035359$$aDFG project G:(GEPRIS)215035359 - TRR 129: Oxyflame - Entwicklung von Methoden und Modellen zur Beschreibung der Reaktion fester Brennstoffe in einer Oxyfuel-Atmosphäre (215035359)$$c215035359$$x1
000992259 536__ $$0G:(DE-82)EXS-PF-PFKA008$$aPFKA008 - Cluster 4 Plastics Recycling (EXS-PF-PFKA008)$$cEXS-PF-PFKA008$$x2
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000992259 536__ $$0G:(DE-82)EXS-PF$$aERS Prep Fund - Exploratory Research Space: Prep Fund als Anschubfinanzierung zur Schließung strategischer Lücken (EXS-PF)$$cEXS-PF$$x3
000992259 591__ $$aGermany
000992259 653_7 $$aChemical recycling
000992259 653_7 $$aDecomposition products
000992259 653_7 $$aFluidized bed reactor
000992259 653_7 $$aOnline FTIR gas analysis
000992259 653_7 $$aPMMA pyrolysis
000992259 7001_ $$0P:(DE-HGF)0$$aHendricks, Katja$$b1
000992259 7001_ $$0P:(DE-HGF)0$$aKnevels, Christoph$$b2
000992259 7001_ $$0P:(DE-HGF)0$$aLehnertz, Marcus$$b3
000992259 7001_ $$0P:(DE-82)IDM00101$$aPalkovits, Regina$$b4$$urwth
000992259 7001_ $$0P:(DE-82)IDM00362$$aKneer, Reinhold$$b5$$urwth
000992259 7870_ $$0RWTH-2025-02271$$aPielsticker, Stefan et.al.$$dNew York, NY [u.a.] : Elsevier, 2025$$iRelatedTo$$tExperimental determination of quantitative yields from polymethyl methacrylate (PMMA) flash pyrolysis in a fluidized bed reactor via online FTIR gas analysis
000992259 8564_ $$uhttps://publications.rwth-aachen.de/record/992259/files/Rechteeinraeumung_992259.pdf
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000992259 9201_ $$0I:(DE-82)154005_20140620$$k154005$$lInstitut für Technische und Makromolekulare Chemie$$x1
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