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

Shaojie Li; Hanglong Wu; Rim C.J. van de Poll; Rick R.M. Joosten; Nikolay Kosinov; Emiel J.M. Hensen

doi:10.1002/cctc.202101852

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

Shaojie Li, Hanglong Wu, Rim C.J. van de Poll, Rick R.M. Joosten, Nikolay Kosinov, Emiel J.M. Hensen (Corresponding author)

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Abstract

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.

Original language	English
Article number	e202101852
Number of pages	14
Journal	ChemCatChem
Volume	14
Issue number	9
DOIs	https://doi.org/10.1002/cctc.202101852
Publication status	Published - 6 May 2022

Bibliographical note

Funding Information:
Shaojie Li acknowledges financial support from the China Scholarship Council (201706450039). The authors thank A. M. Elemans‐Mehring for ICP‐OES analysis.

Funding

Shaojie Li acknowledges financial support from the China Scholarship Council (201706450039). The authors thank A. M. Elemans‐Mehring for ICP‐OES analysis.

Keywords

benzene alkylation
cetyltrimethylammonium
crystal size
mordenite
n-paraffins hydroconversion

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title = "Synthesis of Nanocrystalline Mordenite Zeolite with Improved Performance in Benzene Alkylation and n-Paraffins Hydroconversion",

abstract = "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 Br{\o}nsted 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.",

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note = "Funding Information: Shaojie Li acknowledges financial support from the China Scholarship Council (201706450039). The authors thank A. M. Elemans‐Mehring for ICP‐OES analysis. ",

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AU - Joosten, Rick R.M.

AU - Kosinov, Nikolay

AU - Hensen, Emiel J.M.

N1 - Funding Information: Shaojie Li acknowledges financial support from the China Scholarship Council (201706450039). The authors thank A. M. Elemans‐Mehring for ICP‐OES analysis.

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N2 - 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.

AB - 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.

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

Abstract

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Center for Multiscale Electron Microscopy (CMEM)

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

Abstract

Bibliographical note

Funding

Keywords

Access to Document

Other files and links

Fingerprint

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Center for Multiscale Electron Microscopy (CMEM)

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