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TY  - THES
AU  - Gude, Ursula
TI  - Thermochemische Beständigkeit von Carbonat-Keramik-Membranen für die CO<sub>2</sub>-Abtrennung in Wassergas-Shift-Reaktoren
VL  - 576
PB  - RWTH Aachen University
VL  - Dissertation
CY  - Jülich
M1  - RWTH-2022-06230
SN  - 978-3-95806-626-7
T2  - Schriften des Forschungszentrums Jülich. Reihe Energie & Umwelt = energy & environment
SP  - 1 Online-Ressource : Illustrationen, Diagramme
PY  - 2022
N1  - Druckausgabe: 2022. - Onlineausgabe: 2022. - Auch veröffentlicht auf dem Publikationsserver der RWTH Aachen
N1  - Dissertation, RWTH Aachen University, 2021
AB  - This dissertation investigates a membrane reactor consisting of an upstream water-gas shiftreaction and a CO2-permeable two-phase membrane to be used in an integrated gasification combined cycle (IGCC). This involves the reduction of CO2 emissions through a sensible use of power plant technology by means of a membrane reactor. Aim of this dissertation was to develop a material combination that is thermochemically stable under gasification conditions. This material combination was composed of a porous oxygen-ion conductor and a fluid moltencarbonate. Materialwise, the membrane consisted of a porous oxygen-ion conductor made from eitherCe0,8Gd0,2O2−d (CGO) or Ce0,8Sm0,2O2−d (SDC resp. CSO), and molten cabornate as a second phase. The chemical stability of CGO and CSO was investigated via exposure experiments and X-ray powder diffraction to ensure uniform membrane performance. Under the selected boundary conditions, both CGO and CSO were found to be chemically stable in an IGCC with and without H2S contamination. I calculated the vapor pressure of different molten carbonates using FactSage, both with and without syngas. On the basis of these calculations, the systems of Li2CO3/CaCO3 andLi2CO3/SrCO3 were closely examined. Differential thermal analysis (DTA) was used to determine the eutectic for both mixtures with an open ceramic and a closed platinum crucible. UnderCO2 atmosphere, the eutectic for 64 mol
LB  - PUB:(DE-HGF)11 ; PUB:(DE-HGF)3
DO  - DOI:10.18154/RWTH-2022-06230
UR  - https://publications.rwth-aachen.de/record/848708
ER  -