Reactions of Propane on Supported Mo2C Catalysts

Solymosi, F.; Németh, Róbert; Óvári, László; Egri, László

doi:10.1006/jcat.2000.3000

Cited by 78 publications

(40 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The band of adsorbed methane shows an increasing trend during the reaction. There are also other peaks in these regions which are indexed to other compounds and were detected in very small amounts in GC-MS (as mentioned above): methyl formate (MF) 39,50,51 , ethyl methyl ether (EME) 52 , ethanol [53][54][55] , propane [56][57][58] and butane 59 . This can be the result of random formation in the gas phase rather than the catalyst's activity.…”

Section: Resultsmentioning

confidence: 97%

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Atakan

Erdtman

Mäkie

et al. 2018

Journal of Catalysis

View full text Add to dashboard Cite

The self-archived postprint version of this journal article is available at Linköping University Institutional Repository (DiVA): http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-147297 N.B.: When citing this work, cite the original publication.Atakan, A., Erdtman, E., Mäkie, P., Ojamäe, L., Odén, M., (2018) ABSTRACT: Time evolution of catalytic CO2 hydrogenation to methanol and dimethyl ether (DME) has been investigated in a hightemperature high-pressure reaction chamber where products accumulate over time. The employed catalysts are based on a nano-assembly composed of Cu nanoparticles infiltrated into a Zr doped SiOx mesoporous framework (SBA-15): Cu-Zr-SBA-15. The CO2 conversion was recorded as a function of time by gas chromatography-mass spectrometry (GC-MS) and the molecular activity on the catalyst's surface was examined by diffuse reflectance in-situ Fourier transform infrared spectroscopy (DRIFTS). The experimental results showed that after 14 days a CO2 conversion of 25% to methanol and DME was reached when a DME selective catalyst was used which was also illustrated by thermodynamic equilibrium calculations. With higher Zr content in the catalyst, greater selectivity for methanol and a total 9.5 % conversion to methanol and DME was observed, yielding also CO as an additional product. The time evolution profiles indicated that DME is formed directly from methoxy groups in this reaction system. Both DME and methanol selective systems show the thermodynamically highest possible conversion.

show abstract

Section: Resultsmentioning

confidence: 97%

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Atakan

Erdtman

Mäkie

et al. 2018

Journal of Catalysis

View full text Add to dashboard Cite

show abstract

“…5d) showed a pair of spin-orbit BEs http://carbonlett.org catalyst particles to prevent their agglomeration and to promote the aromatization of CH 4 at an elevated temperature. It is wellknown that the supported Mo compounds on zeolite, as well as a transition alumina, convert CH 4 into aromatic species [37][38][39]. For an Fe-Mo/MgO catalyst with a CH 4 carbon source at 900ºC, it is plausible that intermediate aromatic hydrocarbons are generated at the Mo sites [40].…”

Section: Characterization Of Cntsmentioning

confidence: 99%

Synthesis of thin-multiwalled carbon nanotubes by Fe-Mo/MgO catalyst using sol-gel method

Dubey¹,

Choi²,

Kim³

et al. 2012

Carbon letters

View full text Add to dashboard Cite

The sol-gel technique has been studied to fabricate a homogeneous Fe-Mo/MgO catalyst. Ambient effects (air, Ar, and H 2 ) on thermal decomposition of the citrate precursor have been systematically investigated to fabricate an Fe-Mo/MgO catalyst. Severe agglomeration of metal catalyst was observed under thermal decomposition of citrate precursor in air atmosphere. Ar/H 2 atmosphere effectively restricted agglomeration of bimetallic catalyst and formation of highly-dispersed Fe-Mo/MgO catalyst with high specific surface-area due to the formation of Fe-Mo nanoclusters within MgO support. High-quality thin-multiwalled carbon nanotubes (t-MWCNTs) with uniform diameters were achieved on a large scale by catalytic decomposition of methane over Fe-Mo/MgO catalyst prepared under Ar-atmosphere. The produced t-MWCNTs had outer diameters in the range of 4-8 nm (average diameter ~6.6 nm) and wall numbers in the range of 4-7 graphenes. The as-synthesized t-MWCNTs showed product yields over 450% relative to the utilized Fe-Mo/MgO catalyst, and indicated a purity of about 85%.

show abstract

“…[1][2][3] They have shown interesting catalytic properties in a number of hydrogen-involved reactions, such as hydrogenolysis of n-butane, 4 dehydrogenation of propane, 5 hydrogenation of CO 2 6 and benzene, 7 conversion of methane, 8 water-gas shift, 9 hydrodesulfurization (HDS), 10 and hydrodenitrogenation (HDN). 11, 12 Molybdenum carbide has been the most frequently studied catalyst among the large class of transition metal carbide catalysts.…”

Section: Introductionmentioning

confidence: 99%

In Situ FT-IR Spectroscopic Studies of CO Adsorption on Fresh Mo₂C/Al₂O₃Catalyst

Liang

et al. 2003

J. Phys. Chem. B

View full text Add to dashboard Cite

The surface sites of supported molybdenum carbide catalyst derived from different synthesis stages have been studied by in situ FT-IR spectroscopy using CO as the probe molecule. Adsorbed CO on the reduced passivated Mo 2 C/Al 2 O 3 catalyst gives a main band at 2180 cm -1 , which can be assigned to linearly adsorbed CO on Mo 4+ sites. The IR results show that the surface of reduced passivated sample is dominated by molybdenum oxycarbide. However, a characteristic IR band at 2054 cm -1 was observed for the adsorbed CO on MoO 3 /Al 2 O 3 carburized with CH 4 /H 2 mixture at 1033 K (fresh Mo 2 C/Al 2 O 3 ), which can be assigned to linearly adsorbed CO on Mo δ+ (0 < δ < 2) sites of Mo 2 C/Al 2 O 3 . Unlike adsorbed CO on reduced passivated Mo 2 C/Al 2 O 3 catalyst, the IR spectra of adsorbed CO on fresh Mo 2 C/Al 2 O 3 shows similarity to that on some of the group VIII metals (such as Pt and Pd), suggesting that fresh carbide resembles noble metals. To study the stability of Mo 2 C catalyst during H 2 treatment and find proper conditions to remove the deposited carbon species, H 2 treatment of fresh Mo 2 C/Al 2 O 3 catalyst at different temperatures was conducted. Partial amounts of carbon atoms in Mo 2 C along with some surface-deposited carbon species can be removed by the H 2 treatment even at 450 K. Both the surface-deposited carbon species and carbon atoms in carbide can be extensively removed at temperatures above 873 K.

show abstract

Reactions of Propane on Supported Mo2C Catalysts

Cited by 78 publications

References 24 publications

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Synthesis of thin-multiwalled carbon nanotubes by Fe-Mo/MgO catalyst using sol-gel method

In Situ FT-IR Spectroscopic Studies of CO Adsorption on Fresh Mo₂C/Al₂O₃Catalyst

Contact Info

Product

Resources

About

Reactions of Propane on Supported Mo2C Catalysts

Cited by 78 publications

References 24 publications

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Time evolution of the CO2 hydrogenation to fuels over Cu-Zr-SBA-15 catalysts

Synthesis of thin-multiwalled carbon nanotubes by Fe-Mo/MgO catalyst using sol-gel method

In Situ FT-IR Spectroscopic Studies of CO Adsorption on Fresh Mo2C/Al2O3Catalyst

Contact Info

Product

Resources

About

In Situ FT-IR Spectroscopic Studies of CO Adsorption on Fresh Mo₂C/Al₂O₃Catalyst