Methane dehydro-aromatization on Mo/ZSM-5: About the hidden role of Brønsted acid sites

Tessonnier, Jean‐Philippe; Louis, Benoît; Rigolet, Séverinne; Ledoux, Marc J.; Pham‐Huu, Cuong

doi:10.1016/j.apcata.2007.08.026

Cited by 163 publications

(132 citation statements)

References 27 publications

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“…This coke formation blocks the channels of zeolites and thus leads to catalyst deactivation. It is believed to happen due to the acid sites on zeolite external surface [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Aromatization of Methane Over Mo-Fe/ZSM-5 Catalysts

2009

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Two groups of samples were studied for the aromatization of methane over Mo-Fe/ZSM-5 catalysts. The first group contains fixed loading (5 wt%) and variable Mo/Fe ratio. The second group was prepared with fixed Mo/Fe ratio and variable loading. The samples were characterized by TGA, S BET , XRD, NH 3 -TPD and TPO analysis. NH 3 -TPD results indicate that the strength of strong acid sites increases when Mo/Fe ratio decreases for samples with fixed loading. The amount of strong sites decreases and new intermediate acid sites appear on samples containing both Mo and Fe. XRD results show the presence of iron molybdate for samples impregnated with both Mo and Fe. The catalytic properties of these samples were related not only to the amount and strength of acid sites but also to the iron molybdate phase.

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Section: Introductionmentioning

confidence: 99%

Aromatization of Methane Over Mo-Fe/ZSM-5 Catalysts

2009

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“…Tessonnier et al [86,87] quantified both the amount and the location of Mo ions in Mo/ZSM-5 by means of BET, XRD, 27 Al MAS NMR, NH 3 -TPD, and H/D isotopic exchange techniques. They found the anchoring mode of molybdenum to be strongly influenced by Si/Al ratio in ZSM-5.…”

Section: State and Location Of Mo In Zeolite Matrix And Active Mo Spmentioning

confidence: 99%

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

Guo

Zhao

et al. 2013

Journal of Energy Chemistry

227

183

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“…However, TPO conditions were expected to oxidize not only carbonaceous residues but also the carbided molybdenum usually proposed as the active Mo species [25,26] are expected from the oxidation of carbonaceous residues, but weight increases are expected from the oxidation of carbided molybdenum or ruthenium. In fact, sample MV produced weight gains around 366 and 427 ∘ C, respectively (see Figure 3, curves a and e).…”

Section: Resultsmentioning

confidence: 99%

Comparison of Two Preparation Methods on Catalytic Activity and Selectivity of Ru-Mo/HZSM5 for Methane Dehydroaromatization

Petkovic

Ginosar

2014

Journal of Fuels

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Catalytic performance of Mo/HZSM5 and Ru-Mo/HZSM5 catalysts prepared by vaporization-deposition of molybdenum trioxide and impregnation with ammonium heptamolybdate was analyzed in terms of catalyst activity and selectivity, nitrogen physisorption analyses, temperature-programmed oxidation of carbonaceous residues, and temperature-programmed reduction. Vaporizationdeposition rendered the catalyst more selective to ethylene and coke than the catalyst prepared by impregnation. This result was assigned to lower interaction of molybdenum carbide with the zeolite acidic sites.

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Methane dehydro-aromatization on Mo/ZSM-5: About the hidden role of Brønsted acid sites

Cited by 163 publications

References 27 publications

Aromatization of Methane Over Mo-Fe/ZSM-5 Catalysts

Aromatization of Methane Over Mo-Fe/ZSM-5 Catalysts

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

Comparison of Two Preparation Methods on Catalytic Activity and Selectivity of Ru-Mo/HZSM5 for Methane Dehydroaromatization

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