ISIS Neutron and Muon Source Data Journal

Understanding the effect of catalyst ageing on small molecule diffusion in NOx abatement catalysis

Abstract: We aim to study using QENS the effect of catalyst ageing small molecule (water) mobility in CHA zeolite catalysts used in selective catalytic reduction (SCR) process for emission control technology. QENS measurements will take place at 273, 288, 303 K, and 10 K. The samples will be a fresh CHA catalyst, and a catalyst aged for 200 hours at 523 K in a humid stream, which hydrothermally damages the zeolite framework. The diffusivities obtained using QENS will be compared to macroscopic gravimetry measurements carried out at the Johnson Matthey technology centre (showing significant differences in diffusivity between fresh and aged catalysts) which measure mass transport over larger scales than the nanoscale probed by QENS. We aim to understand the relative importance of nanoscale mobility, and macroscopic mobility in the resulting deactivation of SCR catalysts after the ageing process.

Principal Investigator: Dr Andrew York
Local Contact: Dr Ian Silverwood
Experimenter: Dr Iain Hitchcock
Experimenter: Dr Alexander O'Malley

DOI: 10.5286/ISIS.E.RB1720218

ISIS Experiment Number: RB1720218

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Andrew York et al; (2017): Understanding the effect of catalyst ageing on small molecule diffusion in NOx abatement catalysis , STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1720218

Data is released under the CC-BY-4.0 license.