Abstract
Ni contamination from crude oil in the fluid catalytic cracking (FCC) process is one of the primary sources of catalyst deactivation, thereby promoting dehydrogenation-hydrogenation and speeding up coke growth. Herein, single-particle X-ray fluorescence, diffraction and absorption (μXRF-μXRD-μXAS) tomography is used in combination with confocal fluorescence microscopy (CFM) after thiophene staining to spatially resolve Ni interaction with catalyst components and study zeolite degradation, including the processes of dealumination and Br0nsted acid sites distribution changes. The comparison between a Ni-lean particle, exposed to hydrotreated feedstock, and a Ni-rich one, exposed to non-hydrotreated feedstock, reveals a preferential interaction of Ni, found in co-localization with Fe, with the γ-Al2O3 matrix, leading to the formation of spinel-type hotspots. Although both particles show similar surface zeolite degradation, the Ni-rich particle displays higher dealumination and a clear Brønsted acidity drop.
Original language | English |
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Pages (from-to) | 3950-3955 |
Number of pages | 6 |
Journal | Advanced Materials |
Volume | 132 |
Issue number | 10 |
DOIs | |
Publication status | Published - Mar 2020 |
Bibliographical note
Funding Information:B.M.W. thanks Total and an European Research Council (ERC) Advanced Grant (grant number 321140) for financial support for this project, while F.M. acknowledges a personal VIDI grant from the Netherlands Organization for Scientific Research (NWO). Total is thanked for providing the FCC samples. We also acknowledge the Swiss Light Source (SLS) for providing access to microXAS X05LA beamline.
Funding Information:
B.M.W, thanks Total and an European Research Council (ERC) Advanced Grant (grant number 321140) for financial support for this project, while F.M. acknowledges a personal VIDI grant from the Netherlands Organization for Scientific Research (NWO). Total is thanked for providing the FCC.
Publisher Copyright:
© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Funding
B.M.W. thanks Total and an European Research Council (ERC) Advanced Grant (grant number 321140) for financial support for this project, while F.M. acknowledges a personal VIDI grant from the Netherlands Organization for Scientific Research (NWO). Total is thanked for providing the FCC samples. We also acknowledge the Swiss Light Source (SLS) for providing access to microXAS X05LA beamline. B.M.W, thanks Total and an European Research Council (ERC) Advanced Grant (grant number 321140) for financial support for this project, while F.M. acknowledges a personal VIDI grant from the Netherlands Organization for Scientific Research (NWO). Total is thanked for providing the FCC.
Keywords
- catalyst deactivation
- fluid catalytic cracking (FCC)
- heterogeneous catalysis
- X-ray microscopy
- zeolites