Assessment of the Low-Temperature Nonoxidative Activation of Methane over H-Galloaluminosilicate (MFI) Zeolite: A C-13 Labelling Investigation

Naccache, C.; Mériaudeau, P.; Sapaly, G.; Tiep, Le Van; Taârit, Y. Ben

doi:10.1006/jcat.2001.3376

Cited by 27 publications

(21 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Naccache et al [213] investigated the conversion of the mixtures of propane and methane, or ethane and methane, over a Ga/H-ZSM5 catalyst at temperatures from 290 to 500 • C. Using 13 CH 4 , they confirmed the absence of methane activation, under the conditions reported by Choudhary. However, Liu et al [203] did observe C 1 incorporation via mass spectral analyses of aromatic fragments produced from the reaction of 13 CH 4 with propane as co-reactant.…”

Section: Addition Of Co-reactantsmentioning

confidence: 77%

Recent progress in methane dehydroaromatization: From laboratory curiosities to promising technology

Guo

Zhao

et al. 2013

Journal of Energy Chemistry

222

183

View full text Add to dashboard Cite

Section: Addition Of Co-reactantsmentioning

confidence: 77%

Recent progress in methane dehydroaromatization: From laboratory curiosities to promising technology

Guo

Zhao

et al. 2013

Journal of Energy Chemistry

222

183

View full text Add to dashboard Cite

“…The use of 13 CH 4 showed that a significant part of the propane produced resulted from the reaction of methane with ethylene [59], but it may have been produced in a stoichiometric rather than catalytic manner [58]. On Ga-containing zeolite ZSM-5, mainly propane and isobutane were formed at 570 K [61] and mainly aromatics at 720 K [62]. However, methane was not converted [61,62].…”

Section: Co-conversion Of Methane With Alkenesmentioning

confidence: 99%

Non‐Oxidative Activation of Alkanes

Traa

2008

Handbook of Heterogeneous Catalysis

View full text Add to dashboard Cite

The sections in this article are Introduction Thermodynamic Aspects Activation of Methane Catalytic Decomposition of Methane to Hydrogen and Carbon Conversion of Methane to Ethane and other Aliphatics Aromatization of Methane The Catalyst The Carbonaceous Deposits and Mechanistic Considerations Influence of Co‐Reactants Co‐Conversion of Methane with Alkenes Alkylation of Aromatics with Alkanes Propane as Alkylating Agent Ethane as Alkylating Agent Methane as Alkylating Agent? Other Reactions of Light Alkanes Conclusions Acknowledgments

show abstract

“…In 1997, Choudhary et al reported the conversion of methane into higher hydrocarbons over Ga/ZSM-5 by feeding a lower alkene (C 2 H 4 , C 3 H 6 or 1-butene) together with methane under non-oxidative conditions at temperatures, much lower than those required for the oxidative coupling of methane [10,11]. Naccache et al, however, reported that methane was not inserted into the hydrocarbon products in the conversion of the mixtures of 13 CH 4 and propene (or ethene) over Hgalloaluminosilicate zeolite by the use of [12].…”

Section: Introductionmentioning

confidence: 96%

Conversion of Methane over Ag+-exchanged Zeolite in the Presence of Ethene

Baba

2005

Catal Surv Asia

View full text Add to dashboard Cite

Methane is shown to react with ethene over silver-exchanged zeolites at around 673 K to form higher hydrocarbons. Methane conversion of 13.2% is achieved at 673 K over Ag-ZSM)5 catalyst. Under these conditions, H-ZSM)5 does not catalyze the methane conversion, only ethene being converted into higher hydrocarbons. Zeolites with extra-framework metal cations such as In and Ga also activate methane in the presence of ethene. Using 13 C-labeled methane as a reactant, propene is shown to be a primary product from methane and ethane. 13 C atoms were not found in benzene molecules produced, indicating that benzene is entirely originated from ethane. On the other hand, in toluene, 13 C atoms are found in both the methyl group and the aromatic ring. This implies that toluene is formed by the reaction of propene with butenes formed by the dimerization of ethene, and also by the reaction of benzene with methane. The latter path was confirmed by direct reaction of 13 CH 4 with benzene. In this case, 13 C atoms are found only in methyl groups of toluene produced. The heterolytic dissociation of methane over Ag + -exchanged zeolites is proposed as a reaction mechanism for the catalytic conversion of methane, leading to the formation of silver hydride and CH 3 d+ species, which reacts with ethene and benzene to form propene and toluene, respectively. The conversion of methane over zeolites loaded with metal cations other than Ag + is also described. The reaction of methane with benzene over indium-loaded ZSM)5 afforded toluene and xylenes in yields of up to 7.6% and 0.9% at 623 K when the reaction was carried out in a flow reactor.

show abstract

Assessment of the Low-Temperature Nonoxidative Activation of Methane over H-Galloaluminosilicate (MFI) Zeolite: A C-13 Labelling Investigation

Cited by 27 publications

References 7 publications

Recent progress in methane dehydroaromatization: From laboratory curiosities to promising technology

Recent progress in methane dehydroaromatization: From laboratory curiosities to promising technology

Non‐Oxidative Activation of Alkanes

Conversion of Methane over Ag+-exchanged Zeolite in the Presence of Ethene

Contact Info

Product

Resources

About