Investigation of the oxygen storage capacity behaviour of three way catalysts using spatio-temporal analysis

Abstract

Investigation of the oxygen storage capacity behaviour of Three Way Catalysts using spatio-temporal analysis. Applied Catalysis B: Environmental.

Spatially-resolved investigation of the water inhibition of methane oxidation over palladium

“…In this work, the SpaciMS previously approach adopted by Queen's University Belfast (QUB) 25,29,96 is summarised in setup, the invasiveness of the probes was minimised by reducing parameters known to be crucial to invasiveness, including probe diameter, channel flow rate and capillary suction rate 29 as well as positioning the probes in the corners of the channels, demonstrated computationally to be the least invasive configuration. The probes were translated axially inside the monolith channels via a movable z-motion linear stage controlled by a Thorlabs APT Microstepping Controller (BSC101), automated with an in house Matlab program.…”

“…To access such intra-catalyst information from structured monolithic catalysts, a number of spatially resolved analytical techniques have been developed. [24][25][26][27][28][29][30][31][32][33] Spatially resolved capillary inlet mass spectrometry (SpaciMS) has proved a useful analysis technique for monolithic systems, utilising a series of minimally invasive physical probes 29 , consisting of open ended capillaries and thermocouples to map the gaseous concentration and temperature profiles occurring inside of the monolith channels.…”

“…All model assumptions associated with derivations can be found in the Electronic Supplementary Information (ESI). Based on observations made during previous studies on CO oxidation in the presence of H2O25 , carried out on a 3%Pd/Al2O3 catalyst, a further model has been derived as part of this work (model 9). Under rich conditions, H2O was found to promote the CO oxidation reaction occurring on a 3%Pd/Al2O3 monolith core, contributing a perceived additional oxygen storage-like component (OSC).The additional OSC was hypothesised to originate from the formation of a Pd(OH)x species, forming in the presence of H2O, therefore it would be prudent to expect the formation of the same species under the conditions explored in this study.…”

Thermal ageing of a commercial LNT catalyst: Effects on the structure and functionalities

“…The spatiotemporal analysis of the samples was performed with a spatially resolved capillary inlet mass spectrometer (SpaciMS). Further details of the equipment can be found elsewhere [38]. Typically, cores of 17 mm in diameter and 30 mm long were extracted from the central part of the monolith, wrapped in insulating tape, and placed in the reactor.…”

Covalent structured catalytic materials containing single-atom metal sites with controllable spatial and chemical properties: concept and application

“…Last, but not least, the material must be scalable and affordable, so that it can be used in real-life applications. 13,14 In this paper, we present the concept and application of such designable materials, using a covalent building-block and linker approach. We use functionalised phthalocyanines (Pcs) as stable synthetic porphyrin mimics, connecting these with a series of linkers into a solid network of well-defined single-atom sites.…”