Dual effects of supported W catalysts for dehydroaromatization of methane in the absence of oxygen

Kusmiyati; N. A.S. Amin

doi:10.1007/s10562-005-5205-7

Dual effects of supported W catalysts for dehydroaromatization of methane in the absence of oxygen

Kusmiyati
, N. A.S. Amin^*

^*Corresponding author for this work

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

16 Scopus citations

Abstract

The screening of a series of W-based catalysts on different supports i.e. HZSM-5, Hβ, USY and Al₂O₃ for the dehydroaromatization of methane (DHAM) revealed that HZSM-5 emerged as the best support. Next, the performance of W/HZSM-5 and W-H₂SO ₄/HZSM-5 catalysts for the DHAM reaction was compared to study the effect of acidic treatment in the impregnation method. The results showed that the optimum activity of W-H₂SO₄/HZSM-5 catalyst exceeded that of W/HZSM-5 catalyst. Finally, the influence of Si/Al ratio in the W-H ₂SO₄/HZSM-5 catalyst was studied and the catalyst with Si/Al ratio = 30 was found to be the most promising for the DHAM reaction. The remarkable activity of the catalyst is attributed to the presence of dual effects: suitable content of octahedral polymeric and tetrahedral monomeric tungstate species accompanied by proper amount and strength of acid sites in the catalyst.

Original language	English
Pages (from-to)	69-78
Number of pages	10
Journal	Catalysis Letters
Volume	102
Issue number	1-2
DOIs	https://doi.org/10.1007/s10562-005-5205-7
State	Published - Jul 2005
Externally published	Yes

Keywords

Dehydroaromatization
Methane
Tungstate species
W-based catalysts

ASJC Scopus subject areas

Catalysis
General Chemistry

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10.1007/s10562-005-5205-7

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title = "Dual effects of supported W catalysts for dehydroaromatization of methane in the absence of oxygen",

abstract = "The screening of a series of W-based catalysts on different supports i.e. HZSM-5, Hβ, USY and Al2O3 for the dehydroaromatization of methane (DHAM) revealed that HZSM-5 emerged as the best support. Next, the performance of W/HZSM-5 and W-H2SO 4/HZSM-5 catalysts for the DHAM reaction was compared to study the effect of acidic treatment in the impregnation method. The results showed that the optimum activity of W-H2SO4/HZSM-5 catalyst exceeded that of W/HZSM-5 catalyst. Finally, the influence of Si/Al ratio in the W-H 2SO4/HZSM-5 catalyst was studied and the catalyst with Si/Al ratio = 30 was found to be the most promising for the DHAM reaction. The remarkable activity of the catalyst is attributed to the presence of dual effects: suitable content of octahedral polymeric and tetrahedral monomeric tungstate species accompanied by proper amount and strength of acid sites in the catalyst.",

keywords = "Dehydroaromatization, Methane, Tungstate species, W-based catalysts",

author = "Kusmiyati and Amin, \{N. A.S.\}",

year = "2005",

month = jul,

doi = "10.1007/s10562-005-5205-7",

language = "English",

volume = "102",

pages = "69--78",

journal = "Catalysis Letters",

issn = "1011-372X",

publisher = "Kluwer Academic Publishers",

number = "1-2",

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TY - JOUR

T1 - Dual effects of supported W catalysts for dehydroaromatization of methane in the absence of oxygen

AU - Kusmiyati,

AU - Amin, N. A.S.

PY - 2005/7

Y1 - 2005/7

N2 - The screening of a series of W-based catalysts on different supports i.e. HZSM-5, Hβ, USY and Al2O3 for the dehydroaromatization of methane (DHAM) revealed that HZSM-5 emerged as the best support. Next, the performance of W/HZSM-5 and W-H2SO 4/HZSM-5 catalysts for the DHAM reaction was compared to study the effect of acidic treatment in the impregnation method. The results showed that the optimum activity of W-H2SO4/HZSM-5 catalyst exceeded that of W/HZSM-5 catalyst. Finally, the influence of Si/Al ratio in the W-H 2SO4/HZSM-5 catalyst was studied and the catalyst with Si/Al ratio = 30 was found to be the most promising for the DHAM reaction. The remarkable activity of the catalyst is attributed to the presence of dual effects: suitable content of octahedral polymeric and tetrahedral monomeric tungstate species accompanied by proper amount and strength of acid sites in the catalyst.

AB - The screening of a series of W-based catalysts on different supports i.e. HZSM-5, Hβ, USY and Al2O3 for the dehydroaromatization of methane (DHAM) revealed that HZSM-5 emerged as the best support. Next, the performance of W/HZSM-5 and W-H2SO 4/HZSM-5 catalysts for the DHAM reaction was compared to study the effect of acidic treatment in the impregnation method. The results showed that the optimum activity of W-H2SO4/HZSM-5 catalyst exceeded that of W/HZSM-5 catalyst. Finally, the influence of Si/Al ratio in the W-H 2SO4/HZSM-5 catalyst was studied and the catalyst with Si/Al ratio = 30 was found to be the most promising for the DHAM reaction. The remarkable activity of the catalyst is attributed to the presence of dual effects: suitable content of octahedral polymeric and tetrahedral monomeric tungstate species accompanied by proper amount and strength of acid sites in the catalyst.

KW - Dehydroaromatization

KW - Methane

KW - Tungstate species

KW - W-based catalysts

UR - https://www.scopus.com/pages/publications/21244494765

U2 - 10.1007/s10562-005-5205-7

DO - 10.1007/s10562-005-5205-7

M3 - Article

AN - SCOPUS:21244494765

SN - 1011-372X

VL - 102

SP - 69

EP - 78

JO - Catalysis Letters

JF - Catalysis Letters

IS - 1-2

ER -

Dual effects of supported W catalysts for dehydroaromatization of methane in the absence of oxygen

Abstract

Keywords

ASJC Scopus subject areas

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