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Title: Coke formation in a zeolite crystal during the methanol-to-hydrocarbons reaction as studied with atom probe tomography

Journal Article · · Angewandte Chemie (International Edition)
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  1. Utrecht Univ., Utrecht (Netherlands)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)

Understanding the formation of carbon deposits in zeolites is vital to developing new, superior materials for various applications, including oil and gas conversion processes. Herein, atom probe tomography (APT) has been used to spatially resolve the 3D compositional changes at the sub-nm length scale in a single zeolite ZSM-5 crystal, which has been partially deactivated by the methanol-to-hydrocarbons reaction using 13C-labeled methanol. The results reveal the formation of coke in agglomerates that span length scales from tens of nanometers to atomic clusters with a median size of 30–60 13C atoms. These clusters correlate with local increases in Brønsted acid site density, demonstrating that the formation of the first deactivating coke precursor molecules occurs in nanoscopic regions enriched in aluminum. Here, this nanoscale correlation underscores the importance of carefully engineering materials to suppress detrimental coke formation.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1324189
Journal Information:
Angewandte Chemie (International Edition), Vol. 55, Issue 37; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 63 works
Citation information provided by
Web of Science

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Cited By (18)

Nanoskalige chemische Bildgebung von Zeolithen durch Atomsondentomographie journal June 2018
Nanoscale Chemical Imaging of Zeolites Using Atom Probe Tomography journal July 2018
Visualization of Structural Changes During Deactivation and Regeneration of FAU Zeolite for Catalytic Fast Pyrolysis of Lignin Using NMR and Electron Microscopy Techniques journal August 2018
Probing the Location and Speciation of Elements in Zeolites with Correlated Atom Probe Tomography and Scanning Transmission X‐Ray Microscopy journal October 2018
Selective Conversion of Syngas to Aromatics over a Mo−ZrO 2 /H‐ZSM‐5 Bifunctional Catalyst journal February 2019
Morphology‐Controlled Synthesis of H‐type MFI Zeolites with Unique Stacked Structures through a One‐Pot Solvent‐Free Strategy journal July 2019
Transport Phenomena in Zeolites in View of Graph Theory and Pseudo‐Phase Transition journal August 2019
Acidity enhancement through synergy of penta- and tetra-coordinated aluminum species in amorphous silica networks journal January 2020
Recent trends and fundamental insights in the methanol-to-hydrocarbons process journal June 2018
Discerning the Location and Nature of Coke Deposition from Surface to Bulk of Spent Zeolite Catalysts journal November 2016
Boosting the turnover number of core–shell Al-ZSM-5@B-ZSM-5 zeolite for methanol to propylene reaction by modulating its gradient acid site distribution and low consumption diffusion journal January 2019
Atom Probe Tomography for Catalysis Applications: A Review journal July 2019
Acidity enhancement through synergy of penta- and tetra-coordinated aluminum species in amorphous silica networks text January 2020
Engineering of Transition Metal Catalysts Confined in Zeolites journal May 2018
Nonoxidative Dehydrogenation of Methanol to Methyl Formate through Highly Stable and Reusable CuMgO-Based Catalysts journal January 2019
Isolating Clusters of Light Elements in Molecular Sieves with Atom Probe Tomography journal June 2018
Nanoscale tomography reveals the deactivation of automotive copper-exchanged zeolite catalysts journal November 2017
Interpreting nanovoids in atom probe tomography data for accurate local compositional measurements journal February 2020