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Oxidative coupling of methane in a bubbling fluidized bed reactor

Andorf, R. ; Mleczko, L. ; Schweer, D. ; Baerns, M.

Canadian journal of chemical engineering, 1991-08, Vol.69 (4), p.891-897 [Periódico revisado por pares]

Hoboken: Wiley Subscription Services, Inc., A Wiley Company

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  • Título:
    Oxidative coupling of methane in a bubbling fluidized bed reactor
  • Autor: Andorf, R. ; Mleczko, L. ; Schweer, D. ; Baerns, M.
  • Assuntos: Applied sciences ; catalytic reactions ; Chemical industry and chemicals ; Exact sciences and technology ; fluidized bed reactors ; Industrial chemicals ; natural gas conversion ; Organic industry ; oxidative methane coupling
  • É parte de: Canadian journal of chemical engineering, 1991-08, Vol.69 (4), p.891-897
  • Notas: istex:C632B208B38EF70F2D18B7183C7F0EBE3A743D0A
    Commission of the European Communities - No. EN3C-0023-D
    ark:/67375/WNG-J9P27PHH-5
    ArticleID:CJCE5450690411
  • Descrição: The oxidative coupling of methane to higher hydrocarbons (C2+) was studied in a bubbling fluidized bed reactor between 700°C and 820°C, and with partial pressures of methane from 40 to 70 kPa and of oxygen from 2 to 20 kPa; the total pressure was ca 100 kPa. CaO, Na2CO3/CaO and PbO/γ‐Al2O3 were used as catalytic materials. C2+ selectivity depends markedly on temperature and oxygen partial pressure. The optimum temperature for maximizing C2+ selectivity varies between 720 and 800°C depending on the catalyst. Maximum C2+ selectivities were achieved at low oxygen and high methane partial pressures and amounted to 46% for CaO (T = 780°C; PCH4 = 70 kPa; PO2 = 5 kPa), 53% for Na2CO3/CaO (T = 760°C; PCH4 = 60 kPa; PO2 = 6 kPa) and 70% for PbO/γ‐Al2O3 (T = 720°C; PCH4 = 60 kPa; PO2 = 5 kPa). Maximum yields were obtained at low methane‐to‐oxygen ratios; they amounted to 4.5% for CaO (T = 800°C; PCH4 = 70 kPa; PO2 = 12 kPa), 8.8% for Na2CO3/CaO (T = 820°C; PCH4 = 60 kPa; PO2 = 20 kPa) and 11.3% for PbO/γ‐Al2O3 (T 2= 800°C; PCH4 = 60 kPa; PO2 = 20 kPa). On a étudié le couplage oxydant du méthane en hydrocarbures supérieures (C2+) dans un réacteur à lit fluidisé bouillonnant à des températures comprises entre 700 et 820°C et des pressions partielles comprises entre 40 et 70 kPa pour le méthane et 2 et 20 kPa pour l'oxygène, pour une pression totale de 100 kPa. On a utilisé du CaO, du Na2CO3/CaO et du PbO/γ‐Al2O3 comme matériaux catalytiques. La sélectivité en C2+ dépend dans une large mesure de la température et de la pression partielle de l'oxygène. La température optimum pour maximiser la sélectivité en C2+ varie de 720 à 800°C selon le catalyseur utilisé. Les sélectivités en C2+ maximums ont été obtenues à des pressions partielles d'oxygène faibles et des pressions partielles de méthane élevées et atteignaient 46% pour le CaO (T = 780°C; PCH4 = 70 kPa; PO2 = 5 kPa), 53% pour le Na2CO3/CaO (T = 760°C; PCH4 = 60 kPa; PO2 = 6 kPa) et 70% pour le PbO/γ‐Al2O3 (T = 720°C; PCH4 = 60 kPa; PO2 = 5 kPa). Les rendements maximums ont été obtenus à de faibles rapports méthane/oxygène; ils atteignaient 4,5% pour le CaO (T = 800°C; PCH4 = 70 kPa; PO2 = 12 kPa), 8,8% pour le Na2, CO3/CaO (T = 820°C; PCH4 = 60 kPa; PO2 = 20 kPa) et 11,3% pour le PbO/γ‐Al2O3 (T = 800°C; PCH4 = 60 kPa; PO2 = 20 kPa)
  • Editor: Hoboken: Wiley Subscription Services, Inc., A Wiley Company
  • Idioma: Inglês
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