Synthesis of Nanocrystalline Mordenite Zeolite with Improved Performance in Benzene Alkylation and n‐Paraffins Hydroconversion

Nanocrystalline mordenite (MOR) zeolites were hydrothermally synthesized in a single step with commercial cetyltrimethylammonium (CTA) hydroxide as the sole organic template, while the aluminum source was varied in a typical synthesis gel. CTA can effectively reduce the crystal growth of MOR zeolite...

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Bibliographic Details
Published in:ChemCatChem 2022-05, Vol.14 (9), p.n/a
Main Authors: Li, Shaojie, Wu, Hanglong, Poll, Rim C. J., Joosten, Rick R. M., Kosinov, Nikolay, Hensen, Emiel J. M.
Format: Article
Language:English
Subjects:
Alkylation
Aluminum
Aluminum chloride
Benzene
benzene alkylation
cetyltrimethylammonium
Crystal growth
crystal size
Crystals
Hexadecane
Hydrocarbons
mordenite
n-paraffins hydroconversion
Nanocrystals
Paraffins
Synthesis
Unit cell
Zeolites
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Summary:Nanocrystalline mordenite (MOR) zeolites were hydrothermally synthesized in a single step with commercial cetyltrimethylammonium (CTA) hydroxide as the sole organic template, while the aluminum source was varied in a typical synthesis gel. CTA can effectively reduce the crystal growth of MOR zeolites, in some cases selectively in the a‐ and b‐directions of the unit cell. These nanocrystalline MOR zeolites do not only have a larger external surface area than their bulk counterparts prepared without CTA, but the Brønsted acid sites in the side‐pockets are also more accessible. The combination of the use of CTA and AlCl3 ⋅ 6H2O afforded the best‐performing catalyst with much improved activity in benzene alkylation and hydroconversion of n‐hexadecane (n‐C16). Modifying MOR synthesis with CTA hydroxide is a cheap and effective method to open up the one‐dimensional micropore system of mordenite, increasing the catalytic performance in hydrocarbon reactions. Nanocrystalline MOR zeolites were hydrothermally synthesized in a single step with commercial cetyltrimethylammonium (CTA) hydroxide as the sole organic template, while the aluminum source (Al(NO3)3, AlCl3 and Al(OH)3) was varied in the synthesis gel. The combination of the use of CTA and AlCl3 ⋅ 6H2O afforded the best‐performing catalyst with much improved activity in alkylation of benzene with benzyl alcohol (BA) and significantly higher isomer yield in n‐hexadecane (n‐C16) hydroconversion.
ISSN:1867-3880
1867-3899
DOI:10.1002/cctc.202101852