Synthesis of MFI Zeolites Using DABCO and Methylamine Reagents

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Researchers at Purdue University have developed new methodologies for the synthesis of MFI zeolites. Traditional MFI zeolites typically use organic structure-directing agents such as tetraproylammonium-based solutions (TPA+) that lead to arbitrary and uncontrolled distributions of acid sites. Instead, Purdue researchers have prepared new MFI zeolites via alternative organic structure-directing agents that generate only isolated acid sites. X-ray diffraction has been employed to validate the framework topology of the new ZSM-5 zeolites. Purdue researchers have achieved this unique MFI zeolite with isolated acid sites with aluminosilicate gels containing DABCO and methylamine reagents, and have used cobalt (II) ion (Co2+) uptake as a measure of paired acid site content. This gives an indication of the potential of the MFI zeolite material for adsorption of carbon dioxide, alkanes, and water, as well as acid-catalyzed reaction capacity including for hydrocarbon cracking. The state-of-the-art crystalline MFI materials can be implemented in petrochemical applications for control of olefin oligomerization reactions.

-Isolated Binding and Active Sites
-Lower Cost
-Promising Adsorption and Catalytic Selectivity

Potential Applications:
-Petrochemical Processing
-Zeolite Research and Development

Technology Validation:
The Co2+ ion uptake has been studied in fully functional zeolites, of which the crystal structure has been validated, and indicates that MFI zeolites predominantly have isolated acid sites.

Recent Publication:
"Experimental and Theoretical Assessment of Aluminum Proximity in MFI Zeolites and Its Alteration by Organic and Inorganic Structure-Directing Agents"
Chemistry of Materials
American Chemical Society
DOI: 10.1021/acs.chemmater.0c03154
Aug 31, 2021
Utility-Gov. Funding
United States

Aug 31, 2021
PCT-Gov. Funding

Aug 31, 2020
Provisional-Gov. Funding
United States
Purdue Office of Technology Commercialization
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