BROWSE

Related Researcher

Author

Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

ITEM VIEW & DOWNLOAD

Mn-promoted Ni/Al2O3 catalysts for stable carbon dioxide reforming of methane

Cited 63 times inthomson ciCited 71 times inthomson ci
Title
Mn-promoted Ni/Al2O3 catalysts for stable carbon dioxide reforming of methane
Other Titles
Mn-promoted Ni/Al2O3 catalysts for stable carbon dioxide reforming of methane
Author
Seok, Seung-HoChoi, Sun HeePark, Eun DuckHan, Sung HwanLee, Jae Sung
Keywords
CO2 reforming; methane; nickel catalysts; manganese; potassium; coke deposition
Issue Date
200207
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
JOURNAL OF CATALYSIS, v.209, no.1, pp.6 - 15
Abstract
Based on previous observation that the addition of manganese onto Ni/Al2O3 catalysts reduced the coke formation in the carbon dioxide reforming of methane, effects of the preparation method for Mn-promoted Ni/Al2O3 catalysts on the catalytic activity and stability were investigated. A coprecipitated catalyst, Ni-MnOx/MnAl2O4, showed higher coke resistance and more stable activity than an impregnated Ni/MnO/gamma-Al2O3 catalyst and the well-known Ni0.03Mg0.97O catalyst at 923 K with a feed gas ratio CH4/CO2 of 1 without a diluent gas. In coprecipitated Ni-MnOx/MnAl2O4 catalysts, MnAl2O4, gamma-Al2O3, and Ni(0) were observed as major crystalline phases with XRD and potassium was detected on the surface with EPMA. Comparison of H-2 chemisorption and XRD suggested that the surface of large metallic nickel particles was partly blocked by manganese oxides, and the structure was confirmed by XAFS. For impregnated Ni/MnO/gamma-Al2O3 catalysts, addition of potassium stabilized its catalytic activity further, to the level achieved by coprecipitated Ni-MnOx/MnAl2O4 catalysts. These results indicate that very stable Ni/Al2O3 catalysts for the carbon dioxide reforming of methane can be prepared by addition of both potassium and manganese as promoters. (C) 2002 Elsevier Science (USA)
URI
Go to Link
DOI
http://dx.doi.org/10.1006/jcat.2002.3627
ISSN
0021-9517
Appears in Collections:
ECHE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU