Surface and bulk investigation of ZSM5 and Al-MCM-41 using synchrotron XPS, XANES, and hexane cracking

P. A. Jalil; M. S. Kariapper; M. Faiz; N. Tabet; N. M. Hamdan; J. Diaz; Z. Hussain

doi:10.1016/j.apcata.2005.05.025

Surface and bulk investigation of ZSM5 and Al-MCM-41 using synchrotron XPS, XANES, and hexane cracking

P. A. Jalil, M. S. Kariapper^*, M. Faiz, N. Tabet, N. M. Hamdan, J. Diaz, Z. Hussain

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

8 Scopus citations

Abstract

We present a comparative study of ZSM5 and Al-MCM-41 catalysts using spectroscopic and chemical techniques. The analysis of conventional and synchrotron XPS spectra of these catalysts reveals the presence of a topmost surface-related Si peak in addition to the bulk peak. XANES results suggest structural modification upon heating Al-MCM-41 at 500 °C. Depth-resolved XPS data show Al depletion from the surface of Al-MCM-41 in contrast to surface enrichment of Al in ZSM5. These surface modifications could be one of the reasons for the weak acidity of Al-MCM-41 in chemical reactions such as hexane cracking at different temperatures.

Original language	English
Pages (from-to)	159-165
Number of pages	7
Journal	Applied Catalysis A: General
Volume	290
Issue number	1-2
DOIs	https://doi.org/10.1016/j.apcata.2005.05.025
State	Published - 18 Aug 2005

Bibliographical note

Funding Information:
This work was supported by the U.S. Department of Energy under contract number DE-AC03-76SF00098. PJ, MSK, MF and NT thank KFUPM for its support.

Keywords

Al-MCM-41
XANES
ZSM5

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

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10.1016/j.apcata.2005.05.025

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title = "Surface and bulk investigation of ZSM5 and Al-MCM-41 using synchrotron XPS, XANES, and hexane cracking",

abstract = "We present a comparative study of ZSM5 and Al-MCM-41 catalysts using spectroscopic and chemical techniques. The analysis of conventional and synchrotron XPS spectra of these catalysts reveals the presence of a topmost surface-related Si peak in addition to the bulk peak. XANES results suggest structural modification upon heating Al-MCM-41 at 500 °C. Depth-resolved XPS data show Al depletion from the surface of Al-MCM-41 in contrast to surface enrichment of Al in ZSM5. These surface modifications could be one of the reasons for the weak acidity of Al-MCM-41 in chemical reactions such as hexane cracking at different temperatures.",

keywords = "Al-MCM-41, XANES, ZSM5",

author = "Jalil, {P. A.} and Kariapper, {M. S.} and M. Faiz and N. Tabet and Hamdan, {N. M.} and J. Diaz and Z. Hussain",

note = "Funding Information: This work was supported by the U.S. Department of Energy under contract number DE-AC03-76SF00098. PJ, MSK, MF and NT thank KFUPM for its support.",

year = "2005",

month = aug,

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doi = "10.1016/j.apcata.2005.05.025",

language = "English",

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pages = "159--165",

journal = "Applied Catalysis A: General",

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T1 - Surface and bulk investigation of ZSM5 and Al-MCM-41 using synchrotron XPS, XANES, and hexane cracking

AU - Jalil, P. A.

AU - Kariapper, M. S.

AU - Faiz, M.

AU - Tabet, N.

AU - Hamdan, N. M.

AU - Diaz, J.

AU - Hussain, Z.

N1 - Funding Information: This work was supported by the U.S. Department of Energy under contract number DE-AC03-76SF00098. PJ, MSK, MF and NT thank KFUPM for its support.

PY - 2005/8/18

Y1 - 2005/8/18

N2 - We present a comparative study of ZSM5 and Al-MCM-41 catalysts using spectroscopic and chemical techniques. The analysis of conventional and synchrotron XPS spectra of these catalysts reveals the presence of a topmost surface-related Si peak in addition to the bulk peak. XANES results suggest structural modification upon heating Al-MCM-41 at 500 °C. Depth-resolved XPS data show Al depletion from the surface of Al-MCM-41 in contrast to surface enrichment of Al in ZSM5. These surface modifications could be one of the reasons for the weak acidity of Al-MCM-41 in chemical reactions such as hexane cracking at different temperatures.

AB - We present a comparative study of ZSM5 and Al-MCM-41 catalysts using spectroscopic and chemical techniques. The analysis of conventional and synchrotron XPS spectra of these catalysts reveals the presence of a topmost surface-related Si peak in addition to the bulk peak. XANES results suggest structural modification upon heating Al-MCM-41 at 500 °C. Depth-resolved XPS data show Al depletion from the surface of Al-MCM-41 in contrast to surface enrichment of Al in ZSM5. These surface modifications could be one of the reasons for the weak acidity of Al-MCM-41 in chemical reactions such as hexane cracking at different temperatures.

KW - Al-MCM-41

KW - XANES

KW - ZSM5

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U2 - 10.1016/j.apcata.2005.05.025

DO - 10.1016/j.apcata.2005.05.025

M3 - Article

AN - SCOPUS:22944467210

SN - 0926-860X

VL - 290

SP - 159

EP - 165

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

IS - 1-2

ER -

Surface and bulk investigation of ZSM5 and Al-MCM-41 using synchrotron XPS, XANES, and hexane cracking

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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