Influence of layer structure preservation on the catalytic properties of the pillared zeolite MCM-36

Sudeep Maheshwari; Cristina Martínez; M. Teresa Portilla; Francisco J. Llopis; Avelino Corma; Michael Tsapatsis

doi:10.1016/j.jcat.2010.04.011

Influence of layer structure preservation on the catalytic properties of the pillared zeolite MCM-36

Sudeep Maheshwari, Cristina Martínez, M. Teresa Portilla, Francisco J. Llopis, Avelino Corma, Michael Tsapatsis

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

77 Scopus citations

Abstract

MCM-36 is a catalytically active material made by swelling and subsequent pillaring of a layered zeolite precursor, MCM-22(P). However, the swelling procedures lead to significant destruction of layer structure and alteration of framework silicon/aluminum (Si/Al) ratio, which are likely to influence the acidity and catalytic activity of the final materials. We report a milder swelling and pillaring process to prevent such structural destruction. The resulting pillared materials show higher crystallinity and improved retention of the zeolitic layer structure when compared to the ones prepared by the previously reported methods involving more aggressive treatments. Implications of such structural preservation on the physicochemical, acidic and catalytic properties of the materials have been investigated using a variety of characterization methods. The milder swelling results in catalytic materials with stronger acid sites and, at similar Si/Al ratios, higher acid site density and higher catalytic activity when compared to the MCM-36 materials produced using the previously reported more aggressive swelling process.

Original language	English (US)
Pages (from-to)	298-308
Number of pages	11
Journal	Journal of Catalysis
Volume	272
Issue number	2
DOIs	https://doi.org/10.1016/j.jcat.2010.04.011
State	Published - Jun 15 2010

Bibliographical note

Funding Information:
We gratefully acknowledge Sandeep Kumar for the TEM images and Dr. Sonjong Hwang for the NMR spectra of the MCM-36 materials. We thank Professor Frank Bates for his input since the early stages of this work and Professor Aditya Bhan for suggestions during the writing of this manuscript. This work was made possible with the financial support from the NSF (CBET-0403574 (NIRT) and 0327811), and PROMETEO and Consolider from Generalitat Valenciana and Ministerio de Ciencia e Innovación. Parts of this work were carried out in the University of Minnesota I.T. Characterization facility, which receives partial support from the NSF through the NNIN program. M.T. Portilla gratefully acknowledges CSIC for JAE fellowship.

Keywords

Alkylation
Cracking
Layered zeolites
MCM-36
MWW zeolite
Pillaring
Swelling
Xylene isomerization

Access

10.1016/j.jcat.2010.04.011

OpenUrl availability

Full text

Cite this

@article{965ed13c4c584df6aa9e48be2eb66c3c,

title = "Influence of layer structure preservation on the catalytic properties of the pillared zeolite MCM-36",

abstract = "MCM-36 is a catalytically active material made by swelling and subsequent pillaring of a layered zeolite precursor, MCM-22(P). However, the swelling procedures lead to significant destruction of layer structure and alteration of framework silicon/aluminum (Si/Al) ratio, which are likely to influence the acidity and catalytic activity of the final materials. We report a milder swelling and pillaring process to prevent such structural destruction. The resulting pillared materials show higher crystallinity and improved retention of the zeolitic layer structure when compared to the ones prepared by the previously reported methods involving more aggressive treatments. Implications of such structural preservation on the physicochemical, acidic and catalytic properties of the materials have been investigated using a variety of characterization methods. The milder swelling results in catalytic materials with stronger acid sites and, at similar Si/Al ratios, higher acid site density and higher catalytic activity when compared to the MCM-36 materials produced using the previously reported more aggressive swelling process.",

keywords = "Alkylation, Cracking, Layered zeolites, MCM-36, MWW zeolite, Pillaring, Swelling, Xylene isomerization",

author = "Sudeep Maheshwari and Cristina Mart{\'i}nez and {Teresa Portilla}, M. and Llopis, {Francisco J.} and Avelino Corma and Michael Tsapatsis",

note = "Funding Information: We gratefully acknowledge Sandeep Kumar for the TEM images and Dr. Sonjong Hwang for the NMR spectra of the MCM-36 materials. We thank Professor Frank Bates for his input since the early stages of this work and Professor Aditya Bhan for suggestions during the writing of this manuscript. This work was made possible with the financial support from the NSF (CBET-0403574 (NIRT) and 0327811), and PROMETEO and Consolider from Generalitat Valenciana and Ministerio de Ciencia e Innovaci{\'o}n. Parts of this work were carried out in the University of Minnesota I.T. Characterization facility, which receives partial support from the NSF through the NNIN program. M.T. Portilla gratefully acknowledges CSIC for JAE fellowship.",

year = "2010",

month = jun,

day = "15",

doi = "10.1016/j.jcat.2010.04.011",

language = "English (US)",

volume = "272",

pages = "298--308",

journal = "Journal of Catalysis",

issn = "0021-9517",

publisher = "Academic Press Inc.",

number = "2",

}

TY - JOUR

T1 - Influence of layer structure preservation on the catalytic properties of the pillared zeolite MCM-36

AU - Maheshwari, Sudeep

AU - Martínez, Cristina

AU - Teresa Portilla, M.

AU - Llopis, Francisco J.

AU - Corma, Avelino

AU - Tsapatsis, Michael

N1 - Funding Information: We gratefully acknowledge Sandeep Kumar for the TEM images and Dr. Sonjong Hwang for the NMR spectra of the MCM-36 materials. We thank Professor Frank Bates for his input since the early stages of this work and Professor Aditya Bhan for suggestions during the writing of this manuscript. This work was made possible with the financial support from the NSF (CBET-0403574 (NIRT) and 0327811), and PROMETEO and Consolider from Generalitat Valenciana and Ministerio de Ciencia e Innovación. Parts of this work were carried out in the University of Minnesota I.T. Characterization facility, which receives partial support from the NSF through the NNIN program. M.T. Portilla gratefully acknowledges CSIC for JAE fellowship.

PY - 2010/6/15

Y1 - 2010/6/15

N2 - MCM-36 is a catalytically active material made by swelling and subsequent pillaring of a layered zeolite precursor, MCM-22(P). However, the swelling procedures lead to significant destruction of layer structure and alteration of framework silicon/aluminum (Si/Al) ratio, which are likely to influence the acidity and catalytic activity of the final materials. We report a milder swelling and pillaring process to prevent such structural destruction. The resulting pillared materials show higher crystallinity and improved retention of the zeolitic layer structure when compared to the ones prepared by the previously reported methods involving more aggressive treatments. Implications of such structural preservation on the physicochemical, acidic and catalytic properties of the materials have been investigated using a variety of characterization methods. The milder swelling results in catalytic materials with stronger acid sites and, at similar Si/Al ratios, higher acid site density and higher catalytic activity when compared to the MCM-36 materials produced using the previously reported more aggressive swelling process.

AB - MCM-36 is a catalytically active material made by swelling and subsequent pillaring of a layered zeolite precursor, MCM-22(P). However, the swelling procedures lead to significant destruction of layer structure and alteration of framework silicon/aluminum (Si/Al) ratio, which are likely to influence the acidity and catalytic activity of the final materials. We report a milder swelling and pillaring process to prevent such structural destruction. The resulting pillared materials show higher crystallinity and improved retention of the zeolitic layer structure when compared to the ones prepared by the previously reported methods involving more aggressive treatments. Implications of such structural preservation on the physicochemical, acidic and catalytic properties of the materials have been investigated using a variety of characterization methods. The milder swelling results in catalytic materials with stronger acid sites and, at similar Si/Al ratios, higher acid site density and higher catalytic activity when compared to the MCM-36 materials produced using the previously reported more aggressive swelling process.

KW - Alkylation

KW - Cracking

KW - Layered zeolites

KW - MCM-36

KW - MWW zeolite

KW - Pillaring

KW - Swelling

KW - Xylene isomerization

UR - http://www.scopus.com/inward/record.url?scp=77954212415&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77954212415&partnerID=8YFLogxK

U2 - 10.1016/j.jcat.2010.04.011

DO - 10.1016/j.jcat.2010.04.011

M3 - Article

AN - SCOPUS:77954212415

SN - 0021-9517

VL - 272

SP - 298

EP - 308

JO - Journal of Catalysis

JF - Journal of Catalysis

IS - 2

ER -

Influence of layer structure preservation on the catalytic properties of the pillared zeolite MCM-36

Abstract

Bibliographical note

Keywords

Access

OpenUrl availability

Other files and links

Fingerprint

Cite this