N-Butane dehydrogenation over mono and bimetallic MCM-41 catalysts under oxygen free atmosphere

B. P. Ajayi; B. Rabindran Jermy; K. E. Ogunronbi; B. A. Abussaud; S. Al-Khattaf

doi:10.1016/j.cattod.2012.07.013

N-Butane dehydrogenation over mono and bimetallic MCM-41 catalysts under oxygen free atmosphere

B. P. Ajayi, B. Rabindran Jermy, K. E. Ogunronbi, B. A. Abussaud, S. Al-Khattaf^*

^*Corresponding author for this work

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

34 Scopus citations

Abstract

The present study investigates the dehydrogenation of n-butane over mono (Cr or V) and bimetal (Cr-V) loaded MCM-41 catalysts. Wet impregnation technique was used, where the metal content maintained around 4 wt.%. The unique properties of bimetal supported catalysts were evaluated by means of XRD, N ₂ adsorption, and temperature programmed analysis H₂-TPR and NH₃-TPD. The mixed oxides Cr and V impregnated MCM-41 was tested for dehydrogenation of n-butane at different temperatures ranging 525-600 °C. The catalytic evaluation shows that Cr content of 1.2 wt.% and V content of 2.8 wt.% over MCM-41 designated as 1.2Cr2.8V/M-41 exhibited the highest butane conversion of 20.1% and butenes selectivity of 88.5% at 600 °C. Monometallic forms synthesized through hydrothermal (Cr-MCM-41) and impregnation route (3.5 wt.%Cr/MCM-41 and 3.8 wt.%V/MCM-41) were found to be less active for the dehydrogenation reaction. In the presence of CO₂, the stability of 1.2Cr2.8V/M-41catalyst improved with n-butane conversion of 8.2% at 10 min to 6.5% at 180 min. The improved performance of bimetal catalysts can be correlated to synergetic effect of uniformly dispersed Cr-V-O mixed oxides over MCM-41, high reducibility and surface acidity.

Original language	English
Pages (from-to)	189-196
Number of pages	8
Journal	Catalysis Today
Volume	204
DOIs	https://doi.org/10.1016/j.cattod.2012.07.013
State	Published - 15 Apr 2013

Bibliographical note

Funding Information:
We are grateful for the support from Ministry of Higher Education, Saudi Arabia for the establishment of the Center of Research Excellence in Petroleum Refining and Petrochemicals at King Fahd University of Petroleum and Minerals (KFUPM). The authors acknowledge Japan Cooperation Center, Petroleum (JCCP) to give the opportunity of this collaborative research. Mr. Khurshid Alam is also acknowledged for his help during the experimental work.

Keywords

Bimetal
Dehydrogenation
Impregnation
MCM-41

ASJC Scopus subject areas

Catalysis
General Chemistry

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10.1016/j.cattod.2012.07.013

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@article{6d43f516ecbb4b00bc1a178133d48fe1,

title = "N-Butane dehydrogenation over mono and bimetallic MCM-41 catalysts under oxygen free atmosphere",

abstract = "The present study investigates the dehydrogenation of n-butane over mono (Cr or V) and bimetal (Cr-V) loaded MCM-41 catalysts. Wet impregnation technique was used, where the metal content maintained around 4 wt.\%. The unique properties of bimetal supported catalysts were evaluated by means of XRD, N 2 adsorption, and temperature programmed analysis H2-TPR and NH3-TPD. The mixed oxides Cr and V impregnated MCM-41 was tested for dehydrogenation of n-butane at different temperatures ranging 525-600 °C. The catalytic evaluation shows that Cr content of 1.2 wt.\% and V content of 2.8 wt.\% over MCM-41 designated as 1.2Cr2.8V/M-41 exhibited the highest butane conversion of 20.1\% and butenes selectivity of 88.5\% at 600 °C. Monometallic forms synthesized through hydrothermal (Cr-MCM-41) and impregnation route (3.5 wt.\%Cr/MCM-41 and 3.8 wt.\%V/MCM-41) were found to be less active for the dehydrogenation reaction. In the presence of CO2, the stability of 1.2Cr2.8V/M-41catalyst improved with n-butane conversion of 8.2\% at 10 min to 6.5\% at 180 min. The improved performance of bimetal catalysts can be correlated to synergetic effect of uniformly dispersed Cr-V-O mixed oxides over MCM-41, high reducibility and surface acidity.",

keywords = "Bimetal, Dehydrogenation, Impregnation, MCM-41",

author = "Ajayi, \{B. P.\} and Jermy, \{B. Rabindran\} and Ogunronbi, \{K. E.\} and Abussaud, \{B. A.\} and S. Al-Khattaf",

note = "Funding Information: We are grateful for the support from Ministry of Higher Education, Saudi Arabia for the establishment of the Center of Research Excellence in Petroleum Refining and Petrochemicals at King Fahd University of Petroleum and Minerals (KFUPM). The authors acknowledge Japan Cooperation Center, Petroleum (JCCP) to give the opportunity of this collaborative research. Mr. Khurshid Alam is also acknowledged for his help during the experimental work. ",

year = "2013",

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day = "15",

doi = "10.1016/j.cattod.2012.07.013",

language = "English",

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pages = "189--196",

journal = "Catalysis Today",

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T1 - N-Butane dehydrogenation over mono and bimetallic MCM-41 catalysts under oxygen free atmosphere

AU - Ajayi, B. P.

AU - Jermy, B. Rabindran

AU - Ogunronbi, K. E.

AU - Abussaud, B. A.

AU - Al-Khattaf, S.

N1 - Funding Information: We are grateful for the support from Ministry of Higher Education, Saudi Arabia for the establishment of the Center of Research Excellence in Petroleum Refining and Petrochemicals at King Fahd University of Petroleum and Minerals (KFUPM). The authors acknowledge Japan Cooperation Center, Petroleum (JCCP) to give the opportunity of this collaborative research. Mr. Khurshid Alam is also acknowledged for his help during the experimental work.

PY - 2013/4/15

Y1 - 2013/4/15

N2 - The present study investigates the dehydrogenation of n-butane over mono (Cr or V) and bimetal (Cr-V) loaded MCM-41 catalysts. Wet impregnation technique was used, where the metal content maintained around 4 wt.%. The unique properties of bimetal supported catalysts were evaluated by means of XRD, N 2 adsorption, and temperature programmed analysis H2-TPR and NH3-TPD. The mixed oxides Cr and V impregnated MCM-41 was tested for dehydrogenation of n-butane at different temperatures ranging 525-600 °C. The catalytic evaluation shows that Cr content of 1.2 wt.% and V content of 2.8 wt.% over MCM-41 designated as 1.2Cr2.8V/M-41 exhibited the highest butane conversion of 20.1% and butenes selectivity of 88.5% at 600 °C. Monometallic forms synthesized through hydrothermal (Cr-MCM-41) and impregnation route (3.5 wt.%Cr/MCM-41 and 3.8 wt.%V/MCM-41) were found to be less active for the dehydrogenation reaction. In the presence of CO2, the stability of 1.2Cr2.8V/M-41catalyst improved with n-butane conversion of 8.2% at 10 min to 6.5% at 180 min. The improved performance of bimetal catalysts can be correlated to synergetic effect of uniformly dispersed Cr-V-O mixed oxides over MCM-41, high reducibility and surface acidity.

AB - The present study investigates the dehydrogenation of n-butane over mono (Cr or V) and bimetal (Cr-V) loaded MCM-41 catalysts. Wet impregnation technique was used, where the metal content maintained around 4 wt.%. The unique properties of bimetal supported catalysts were evaluated by means of XRD, N 2 adsorption, and temperature programmed analysis H2-TPR and NH3-TPD. The mixed oxides Cr and V impregnated MCM-41 was tested for dehydrogenation of n-butane at different temperatures ranging 525-600 °C. The catalytic evaluation shows that Cr content of 1.2 wt.% and V content of 2.8 wt.% over MCM-41 designated as 1.2Cr2.8V/M-41 exhibited the highest butane conversion of 20.1% and butenes selectivity of 88.5% at 600 °C. Monometallic forms synthesized through hydrothermal (Cr-MCM-41) and impregnation route (3.5 wt.%Cr/MCM-41 and 3.8 wt.%V/MCM-41) were found to be less active for the dehydrogenation reaction. In the presence of CO2, the stability of 1.2Cr2.8V/M-41catalyst improved with n-butane conversion of 8.2% at 10 min to 6.5% at 180 min. The improved performance of bimetal catalysts can be correlated to synergetic effect of uniformly dispersed Cr-V-O mixed oxides over MCM-41, high reducibility and surface acidity.

KW - Bimetal

KW - Dehydrogenation

KW - Impregnation

KW - MCM-41

UR - https://www.scopus.com/pages/publications/84873716015

U2 - 10.1016/j.cattod.2012.07.013

DO - 10.1016/j.cattod.2012.07.013

M3 - Article

AN - SCOPUS:84873716015

SN - 0920-5861

VL - 204

SP - 189

EP - 196

JO - Catalysis Today

JF - Catalysis Today

ER -

N-Butane dehydrogenation over mono and bimetallic MCM-41 catalysts under oxygen free atmosphere

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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