Thermal stability and SO2 resistance of Pd/Rh-perovskite based three-way catalyst wash-coated on cordierite monoliths

Date

2022-01-01

Author

Bayram, Bilal
Önal, Işık
Külah, Görkem

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

225
views

0
downloads

The effect of hydrothermal aging and SO2 poisoning on the three-way catalytic performance of dispersed Pd/Rh-based and Pd/Rh perovskite-based catalysts were studied by using a dynamic activity test system that simulates redox fluctuations of gasoline engine exhaust conditions. Both catalysts were supported on ceria-zirconia-alumina and wash-coated on cordierite monoliths and were characterized by ICP-OES, BET, XRD, TEM-EDX, DRIFTS, and CO chemisorption. Their performance was very close when the catalysts were fresh but, after 3 h of hydrothermal aging at 1000 degrees C, the dispersed Pd/Rh-based catalyst lost its performance especially with respect to C3H8 and NO conversions; however, the Pd/Rh perovskite-based catalyst kept its activity. Parallel to that, CO uptake capacity losses after hydrothermal aging were 85% and 30% for the dispersed metallic catalyst and the perovskite-based catalyst, respectively. Moreover, 20 ppm SO2 exposure decreased CO uptake capacities by 61% and 48% for the two catalysts, respectively.

Subject Keywords

Rh-Pd-Perovskite, SO2 poisoning, three-way catalysts, thermal stability, SELF-REGENERATION, OXIDATION CATALYST, PHASE-COMPOSITION, CARBON-MONOXIDE, CO OXIDATION, PD, TEMPERATURE, EXHAUST, OXIDE, DEACTIVATION

URI

https://hdl.handle.net/11511/95986

Journal

CHEMICAL ENGINEERING COMMUNICATIONS

DOI

https://doi.org/10.1080/00986445.2022.2030727

Collections

Department of Chemical Engineering, Article

Suggestions

OpenMETU
Core

Development of three way catalytic converter for automotive exhaust gas Bayram, Bilal; Külah, Görkem; Önal, Işık; Department of Chemical Engineering (2021-7-9) In this study, a novel perovskite-based three-way catalyst (LaFe0.57Co0.37Pd0.06O3/Ce0.8Zr0.2O2/Al2O3) with high performance, thermal stability and SO2 poisoning resistance was developed. The performance of the developed catalyst was compared to a standard catalyst based on dispersed metal (Pd/Rh/ Ce0.8Zr0.2O2 / Al2O3). Performance evaluations were carried out in a dynamic activity test system that simulates redox fluctuations in the exhaust of gasoline engines. ICP-OES, BET surface area, X-ray diffraction,...
Thermal characterization and model-free kinetics of biodiesel sample Kök, Mustafa Verşan (2015-11-01) In this study, combustion and pyrolysis behaviours of methanol route biodiesel were investigated using thermal analysis techniques known as simultaneous thermogravimetry and differential scanning calorimetry (DSC) at different heating rates. Reaction regions, peak temperatures, mass loss and heat flow rates of the biodiesel sample are determined using TG-DTG and DSC data. It was found that as the heating rate of the reactions increased, peak temperatures of the reactions shifted higher temperatures, implyin...
Thermal characterization, combustion and kinetics of different origin crude oils Gundogar, Asli S.; Kök, Mustafa Verşan (2014-05-01) In this research, the combustion behavior of six Turkish crude oils (light and medium type) was investigated by thermogravimetry/derivative thermogravimetry (TG/DTG) and differential scanning calorimetry (DSC) methods under atmospheric air in the absence of rock matrix. Two main reaction intervals were observed on all thermograms known as low temperature oxidation (LTO) and high temperature oxidation (HTO) regions. The resulting curves showed that the mass loss under combustion is accompanied by exothermic ...
HYBRID CATALYTIC COMBUSTION OF METHANE/HYDROGEN MIXTURES Cimino, S.; Allouis, Christophe Gerard; Mancino, G.; Nigro, R. (2014-05-01) Hybrid catalytic combustion technology, which is a staged process comprising a preliminary catalytic partial oxidation (CPO) step followed by a homogeneous flame combustion with interstage heat removal, was tested for the first time with mixtures of methane and hydrogen. Short contact time CPO experiments were run to elucidate the effect of the progressive substitution of methane with H-2 in the fuel feed to the structured catalytic reactor, which was operated under self-sustained conditions at high tempera...
Experimental investigation of CO tolerance in high temperature PEM fuel cells DEVRİM, YILSER; Albostan, Ayhan; Devrim, Huseyin (Elsevier BV, 2018-10-04) In the present work, the effect of operating a high temperature proton exchange membrane fuel cell (HT-PEMFC) with different reactant gases has been investigated throughout performance tests. Also, the effects of temperature on the performance of a HT-PEMFC were analyzed at varying temperatures, ranging from 140 degrees C to 200 degrees C. Increasing the operating temperature of the cell increases the performance of the HT-PEMFC. The optimum operating temperature was determined to be 160 degrees C due to th...

Citation Formats

B. Bayram, I. Önal, and G. Külah, “Thermal stability and SO2 resistance of Pd/Rh-perovskite based three-way catalyst wash-coated on cordierite monoliths,” CHEMICAL ENGINEERING COMMUNICATIONS, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/95986.