Enhanced decoking of a coked zeolite catalyst using a glow discharge in Ar-O2 gas mixture

M. A. Khan; A. A. Al-Jalal

doi:10.1016/j.apcata.2004.05.027

Enhanced decoking of a coked zeolite catalyst using a glow discharge in Ar-O₂ gas mixture

M. A. Khan^*
, A. A. Al-Jalal

^*Corresponding author for this work

Department of Physics

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

19 Scopus citations

Abstract

We have recently reported decoking of a coked zeolite catalyst in a glow discharge in O₂ gas. Spectroscopic monitoring of the atomization of O₂ and the accompanying conversion of coke to CO, CO₂ and other gaseous products was used in conjunction with X-ray photoelectron spectroscopy (XPS) to determine the rate and extent of decoking. We have now investigated several different gas mixtures, including N₂-O ₂, He-O₂ and Ar-O₂ mixtures with different compositions, to study possible enhancements in the decoking process. The He-O₂ and Ar-O₂ gas mixtures provided significantly large enhancements in the decoking process. However, the best results were from the Ar-O₂ gas mixture: over 600% increase in the atomization of O ₂ and up to 350% increase in the CO yield, associated with the decoking process, were recorded.

Original language	English
Pages (from-to)	141-149
Number of pages	9
Journal	Applied Catalysis A: General
Volume	272
Issue number	1-2
DOIs	https://doi.org/10.1016/j.apcata.2004.05.027
State	Published - 28 Sep 2004

Bibliographical note

Funding Information:
This work is a part of the Research Project SABIC-2000-11. The support from King Fahd University of Petroleum and Minerals and the Research Institute is gratefully acknowledged. Dr. Tabet and Mr. Iftikhar Khattak of the Physics Department, KFUPM carried out the XPS analysis for us and we deeply appreciate their cooperation. The help of Mr. I.A. Bakhtiari and Mr. Pillai in some decoking experiments is also gratefully acknowledged.

Keywords

CO monitoring
Catalyst regeneration
Enhanced decoking
Glow discharge
Visible region spectroscopy

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

Access to Document

10.1016/j.apcata.2004.05.027

Cite this

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title = "Enhanced decoking of a coked zeolite catalyst using a glow discharge in Ar-O2 gas mixture",

abstract = "We have recently reported decoking of a coked zeolite catalyst in a glow discharge in O2 gas. Spectroscopic monitoring of the atomization of O2 and the accompanying conversion of coke to CO, CO2 and other gaseous products was used in conjunction with X-ray photoelectron spectroscopy (XPS) to determine the rate and extent of decoking. We have now investigated several different gas mixtures, including N2-O 2, He-O2 and Ar-O2 mixtures with different compositions, to study possible enhancements in the decoking process. The He-O2 and Ar-O2 gas mixtures provided significantly large enhancements in the decoking process. However, the best results were from the Ar-O2 gas mixture: over 600\% increase in the atomization of O 2 and up to 350\% increase in the CO yield, associated with the decoking process, were recorded.",

keywords = "CO monitoring, Catalyst regeneration, Enhanced decoking, Glow discharge, Visible region spectroscopy",

author = "Khan, \{M. A.\} and Al-Jalal, \{A. A.\}",

note = "Funding Information: This work is a part of the Research Project SABIC-2000-11. The support from King Fahd University of Petroleum and Minerals and the Research Institute is gratefully acknowledged. Dr. Tabet and Mr. Iftikhar Khattak of the Physics Department, KFUPM carried out the XPS analysis for us and we deeply appreciate their cooperation. The help of Mr. I.A. Bakhtiari and Mr. Pillai in some decoking experiments is also gratefully acknowledged. ",

year = "2004",

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doi = "10.1016/j.apcata.2004.05.027",

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AU - Khan, M. A.

AU - Al-Jalal, A. A.

N1 - Funding Information: This work is a part of the Research Project SABIC-2000-11. The support from King Fahd University of Petroleum and Minerals and the Research Institute is gratefully acknowledged. Dr. Tabet and Mr. Iftikhar Khattak of the Physics Department, KFUPM carried out the XPS analysis for us and we deeply appreciate their cooperation. The help of Mr. I.A. Bakhtiari and Mr. Pillai in some decoking experiments is also gratefully acknowledged.

PY - 2004/9/28

Y1 - 2004/9/28

N2 - We have recently reported decoking of a coked zeolite catalyst in a glow discharge in O2 gas. Spectroscopic monitoring of the atomization of O2 and the accompanying conversion of coke to CO, CO2 and other gaseous products was used in conjunction with X-ray photoelectron spectroscopy (XPS) to determine the rate and extent of decoking. We have now investigated several different gas mixtures, including N2-O 2, He-O2 and Ar-O2 mixtures with different compositions, to study possible enhancements in the decoking process. The He-O2 and Ar-O2 gas mixtures provided significantly large enhancements in the decoking process. However, the best results were from the Ar-O2 gas mixture: over 600% increase in the atomization of O 2 and up to 350% increase in the CO yield, associated with the decoking process, were recorded.

AB - We have recently reported decoking of a coked zeolite catalyst in a glow discharge in O2 gas. Spectroscopic monitoring of the atomization of O2 and the accompanying conversion of coke to CO, CO2 and other gaseous products was used in conjunction with X-ray photoelectron spectroscopy (XPS) to determine the rate and extent of decoking. We have now investigated several different gas mixtures, including N2-O 2, He-O2 and Ar-O2 mixtures with different compositions, to study possible enhancements in the decoking process. The He-O2 and Ar-O2 gas mixtures provided significantly large enhancements in the decoking process. However, the best results were from the Ar-O2 gas mixture: over 600% increase in the atomization of O 2 and up to 350% increase in the CO yield, associated with the decoking process, were recorded.

KW - CO monitoring

KW - Catalyst regeneration

KW - Enhanced decoking

KW - Glow discharge

KW - Visible region spectroscopy

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