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@MISC{Pielsticker:992259,
author = {Pielsticker, Stefan and Hendricks, Katja and Knevels,
Christoph and Lehnertz, Marcus and Palkovits, Regina and
Kneer, Reinhold},
title = {{E}xperimental determination of quantitative yields from
polymethyl methacrylate ({PMMA}) flash pyrolysis in a
fluidized bed reactor via online {FTIR} gas analysis –
{S}upplementary dataset},
reportid = {RWTH-2024-08099},
year = {2025},
abstract = {Chemical 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.},
cin = {412610 / 154005 / 150000},
cid = {$I:(DE-82)412610_20140620$ / $I:(DE-82)154005_20140620$ /
$I:(DE-82)150000_20140620$},
pnm = {DFG project G:(GEPRIS)240954932 - Experimentelle
Untersuchung von Pyrolyse- und Koksumsatzkinetiken in einem
„Well-Stirred-Reactor“ unter atmosphärischen und
druckbeaufschlagten Bedingungen (A01) (240954932) / DFG
project G:(GEPRIS)215035359 - TRR 129: Oxyflame -
Entwicklung von Methoden und Modellen zur Beschreibung der
Reaktion fester Brennstoffe in einer Oxyfuel-Atmosphäre
(215035359) / PFKA008 - Cluster 4 Plastics Recycling
(EXS-PF-PFKA008) / EXS - Excellence Strategy (EXS) / ERS
Prep Fund - Exploratory Research Space: Prep Fund als
Anschubfinanzierung zur Schließung strategischer Lücken
(EXS-PF)},
pid = {G:(GEPRIS)240954932 / G:(GEPRIS)215035359 /
G:(DE-82)EXS-PF-PFKA008 / G:(DE-82)EXS / G:(DE-82)EXS-PF},
typ = {PUB:(DE-HGF)32},
doi = {10.18154/RWTH-2024-08099},
url = {https://publications.rwth-aachen.de/record/992259},
}
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