The selective oxidation of methane to ethane and ethylene over doped and un-doped rare earth oxides

S.J. Korf, J.A. Roos, J.M. Diphoorn, R.H.J. Veehof, J.G. van Ommen, J.R.H. Ross

Research output: Contribution to journalArticleAcademic

60 Citations (Scopus)
76 Downloads (Pure)

Abstract

A comparison has been made of the behaviour in the oxidative coupling of methane of the oxides of Sm, Dy, Gd, La and Tb with that of a Li/MgO material. All but the Tb4O7 (which gave total oxidation) were found to give higher yields than the Li/MgO material at temperatures up to approaching 750°C but the Li/MgO system gave better results at higher temperatures. The cubic structure of Sm2O3 was found to be responsible for its good performance while the monoclinic structure was relatively inactive and unselective. The addition of Na or Ca to cubic Sm2O3 gives a higher optimum C2 yield than that of unpromoted Sm2O3. Sm2O3 and Ca/Sm2O3 catalysts are more stable than Li/MgO, Li/Sm2O3 or Na/Sm2O3. The addition of Li or Na to Sm2O3 causes the structure to change from cubic to monoclinic; the deactivation of the Na/Sm2O3 catalysts is caused by a loss of Na coupled with the formation of the monoclinic form of Sm2O3.
Original languageUndefined
Pages (from-to)279-292
JournalCatalysis today
Volume4
Issue number3-4
DOIs
Publication statusPublished - 1989

Keywords

  • IR-70489

Cite this

Korf, S. J., Roos, J. A., Diphoorn, J. M., Veehof, R. H. J., van Ommen, J. G., & Ross, J. R. H. (1989). The selective oxidation of methane to ethane and ethylene over doped and un-doped rare earth oxides. Catalysis today, 4(3-4), 279-292. https://doi.org/10.1016/0920-5861(89)85024-2
Korf, S.J. ; Roos, J.A. ; Diphoorn, J.M. ; Veehof, R.H.J. ; van Ommen, J.G. ; Ross, J.R.H. / The selective oxidation of methane to ethane and ethylene over doped and un-doped rare earth oxides. In: Catalysis today. 1989 ; Vol. 4, No. 3-4. pp. 279-292.
@article{9d30e0ebf4704b498dc329de25ada40a,
title = "The selective oxidation of methane to ethane and ethylene over doped and un-doped rare earth oxides",
abstract = "A comparison has been made of the behaviour in the oxidative coupling of methane of the oxides of Sm, Dy, Gd, La and Tb with that of a Li/MgO material. All but the Tb4O7 (which gave total oxidation) were found to give higher yields than the Li/MgO material at temperatures up to approaching 750°C but the Li/MgO system gave better results at higher temperatures. The cubic structure of Sm2O3 was found to be responsible for its good performance while the monoclinic structure was relatively inactive and unselective. The addition of Na or Ca to cubic Sm2O3 gives a higher optimum C2 yield than that of unpromoted Sm2O3. Sm2O3 and Ca/Sm2O3 catalysts are more stable than Li/MgO, Li/Sm2O3 or Na/Sm2O3. The addition of Li or Na to Sm2O3 causes the structure to change from cubic to monoclinic; the deactivation of the Na/Sm2O3 catalysts is caused by a loss of Na coupled with the formation of the monoclinic form of Sm2O3.",
keywords = "IR-70489",
author = "S.J. Korf and J.A. Roos and J.M. Diphoorn and R.H.J. Veehof and {van Ommen}, J.G. and J.R.H. Ross",
year = "1989",
doi = "10.1016/0920-5861(89)85024-2",
language = "Undefined",
volume = "4",
pages = "279--292",
journal = "Catalysis today",
issn = "0920-5861",
publisher = "Elsevier",
number = "3-4",

}

Korf, SJ, Roos, JA, Diphoorn, JM, Veehof, RHJ, van Ommen, JG & Ross, JRH 1989, 'The selective oxidation of methane to ethane and ethylene over doped and un-doped rare earth oxides', Catalysis today, vol. 4, no. 3-4, pp. 279-292. https://doi.org/10.1016/0920-5861(89)85024-2

The selective oxidation of methane to ethane and ethylene over doped and un-doped rare earth oxides. / Korf, S.J.; Roos, J.A.; Diphoorn, J.M.; Veehof, R.H.J.; van Ommen, J.G.; Ross, J.R.H.

In: Catalysis today, Vol. 4, No. 3-4, 1989, p. 279-292.

Research output: Contribution to journalArticleAcademic

TY - JOUR

T1 - The selective oxidation of methane to ethane and ethylene over doped and un-doped rare earth oxides

AU - Korf, S.J.

AU - Roos, J.A.

AU - Diphoorn, J.M.

AU - Veehof, R.H.J.

AU - van Ommen, J.G.

AU - Ross, J.R.H.

PY - 1989

Y1 - 1989

N2 - A comparison has been made of the behaviour in the oxidative coupling of methane of the oxides of Sm, Dy, Gd, La and Tb with that of a Li/MgO material. All but the Tb4O7 (which gave total oxidation) were found to give higher yields than the Li/MgO material at temperatures up to approaching 750°C but the Li/MgO system gave better results at higher temperatures. The cubic structure of Sm2O3 was found to be responsible for its good performance while the monoclinic structure was relatively inactive and unselective. The addition of Na or Ca to cubic Sm2O3 gives a higher optimum C2 yield than that of unpromoted Sm2O3. Sm2O3 and Ca/Sm2O3 catalysts are more stable than Li/MgO, Li/Sm2O3 or Na/Sm2O3. The addition of Li or Na to Sm2O3 causes the structure to change from cubic to monoclinic; the deactivation of the Na/Sm2O3 catalysts is caused by a loss of Na coupled with the formation of the monoclinic form of Sm2O3.

AB - A comparison has been made of the behaviour in the oxidative coupling of methane of the oxides of Sm, Dy, Gd, La and Tb with that of a Li/MgO material. All but the Tb4O7 (which gave total oxidation) were found to give higher yields than the Li/MgO material at temperatures up to approaching 750°C but the Li/MgO system gave better results at higher temperatures. The cubic structure of Sm2O3 was found to be responsible for its good performance while the monoclinic structure was relatively inactive and unselective. The addition of Na or Ca to cubic Sm2O3 gives a higher optimum C2 yield than that of unpromoted Sm2O3. Sm2O3 and Ca/Sm2O3 catalysts are more stable than Li/MgO, Li/Sm2O3 or Na/Sm2O3. The addition of Li or Na to Sm2O3 causes the structure to change from cubic to monoclinic; the deactivation of the Na/Sm2O3 catalysts is caused by a loss of Na coupled with the formation of the monoclinic form of Sm2O3.

KW - IR-70489

U2 - 10.1016/0920-5861(89)85024-2

DO - 10.1016/0920-5861(89)85024-2

M3 - Article

VL - 4

SP - 279

EP - 292

JO - Catalysis today

JF - Catalysis today

SN - 0920-5861

IS - 3-4

ER -