Investigation of the deactivation of a washcoated monolith using a spatially resolved technique

Wang, Yuhan; Stere, Cristina; McCullough, Geoffrey; Li, Mingyang; Goguet, Alexandre

doi:10.1039/d2cy01961b

Cited by 2 publications

(3 citation statements)

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“…[15] Goguet et al more recently investigated CO oxidation within a commercially aged Pd/Al 2 O 3 monolith catalyst using SpaciMS, discovering that deactivation significantly affected the diffusion parameters, with molecular and Knudsen diffusion being dominant in the substrate and washcoat respectively. [16] Deutschmann et al studied total and partial oxidation reactions on Pt/Pd/Al 2 O 3 and Rh-based catalytic monoliths, establishing correlations between catalytic activity, surface area, and aging effects. [17][18][19] Schmidt and Horn et al developed a distinct capillary technique for minimally perturbing the concentration, flow, and temperature fields in foam monolith catalysts during spatial profiling.…”

Section: Gas-phase Profiling: Probing Local Chemical Compositionmentioning

confidence: 99%

“…Goguet et al. more recently investigated CO oxidation within a commercially aged Pd/Al 2 O 3 monolith catalyst using SpaciMS, discovering that deactivation significantly affected the diffusion parameters, with molecular and Knudsen diffusion being dominant in the substrate and washcoat respectively [16] . Deutschmann et al.…”

Section: Catalyst Characterization In the 21st Century: From ‘Still L...mentioning

confidence: 99%

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Unlocking the Mysteries of Technical Catalyst Deactivation: A View from Space

Sharma,

Maurer,

Lott

et al. 2024

ChemCatChem

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Modern analytical techniques enable researchers to study heterogeneous catalytic systems at extended length scales and with local probing methods which were previously impractical. Such spatially‐resolved analyses are ideal for exploring the complex dynamics governing catalytic activity, and more specifically, deactivation. Here we highlight significant experimental concepts and milestones in the spatially‐resolved analysis of technical catalysts, where it is now possible to study catalyst behavior even up to industrially relevant scale. At such extended length scales and in contrast to many model systems, spatial heterogeneities in solid catalyst bodies may play a crucial role in controlling catalytic properties and may be closely linked to catalyst deactivation. Spatially‐resolved studies can therefore provide a unique source of information about such local phenomena. Researchers can gain a deeper insight into the operational life of a catalyst by understanding deactivation patterns, which are one of many factors influencing the dynamics of catalytic reactions. In turn, this information promotes the design of more robust and sustainable catalytic systems. We therefore outline the current state of spatially‐resolved characterization, together with its role in deconvoluting the complexity of technical catalysts and their deactivation.

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Section: Gas-phase Profiling: Probing Local Chemical Compositionmentioning

confidence: 99%

Section: Catalyst Characterization In the 21st Century: From ‘Still L...mentioning

confidence: 99%

Unlocking the Mysteries of Technical Catalyst Deactivation: A View from Space

Sharma,

Maurer,

Lott

et al. 2024

ChemCatChem

View full text Add to dashboard Cite

show abstract

“…Such axially resolved insights enabled to monitor and understand a wide variety of phenomena relevant for methane oxidation catalysts, i.e. water inhibition, 9,37 aging-induced deactivation, 38 or the formation of potentially beneficial temperature and particle size gradients along the catalyst. 33,39…”

Section: Introductionmentioning

confidence: 99%