Anomalous steady-state and spatio-temporal features of methane oxidation on Pt/Pd/Al2O3 monolith spanning lean and rich conditions

Lean-Burn Natural Gas Engines: Challenges and Concepts for an Efficient Exhaust Gas Aftertreatment System

“…Since the development of materials and catalyst formulations that permanently withstand the negative impact of these species proceeds only slowly, rationally designed process control and reaction engineering approaches pose possible alternatives to ensure high catalytic conversion. Any procedure for catalyst reactivation needs to be an optimized process that takes engine operation and catalyst operation parameters into account, as methane conversion over Pd-based catalysts is particularly sensitive towards the feed gas composition [22]. Rich treatment, for instance, can remove adsorbed surface species blocking the catalyst's active sites, which allows to regenerate catalysts that were deactivated by water or poisoned by sulfur [20,23,24].…”

A High-Throughput Screening Approach to Identify New Active and Long-Term Stable Catalysts for Total Oxidation of Methane from Gas-Fueled Lean–Burn Engines

“…The catalytic total oxidation of methane has been in the focus of research for quite some time [4,5]. Many recent publications focus on palladium-containing catalysts or try to find other precious metal (PM) [12,[39][40][41][42][43][44][45] and PM-free catalysts [46][47][48][49][50][51][52][53][54][55].…”

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

“…Nevertheless by employing such analysis techniques, crucial intra-catalyst information is often lost within the monolith, especially regarding reaction profiles, intermediate formation, catalyst deactivation, reaction pathways and temperature evolution. To overcome such limitations a number of spatially resolved analysis techniques employing physical measurement probes have been developed, including fixed bed applications using IR, MS or GC analysis [30][31][32][33][34][35], monolith catalyst testing using spatially resolved capillary-inlet mass spectroscopy (SpaciMS) [36][37][38] modified with IR [39,40], or applied to foams [41], and other spatially resolved techniques including catalytic plate reactors [42,43] stagnation flow reactors (SFR) [44], scanning mass spectrometry (SMS) on microstructures [45,46], and other SpaciMS like techniques [47][48][49]. Although the insertion of physical probes can be considered invasive in some configurations, it has been shown via 3D CFD modelling that the probes can be considered non-invasive under specific conditions and configurations i.e.…”