Methane decomposition over Pd promoted Ni/MgAl2O4 catalysts for the production of COx free hydrogen and multiwalled carbon nanotubes

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Abstract

This article reports the synthesis, characterization and catalytic performance of Pd promoted Ni/MgAl2O4 spinel catalysts for the thermal decomposition of methane into hydrogen and carbon nanotubes. The as-synthesized catalysts were characterized for their structural, textural, morphological properties. The catalytic properties of the Ni/MgAl2O4 catalyst were found to be enhanced with Pd promoter. It effectively increased the surface area of the catalyst without affecting the pore parameters and improved the fine dispersion of NiO particles on the surface of the magnesium aluminate. The reduction temperature of Ni/MgAl2O4 was found to be lowered after Pd deposition. Moreover, the Pd promoted catalyst provided high catalytic activity and stability for methane decomposition. A maximum hydrogen yield of ∼57% was obtained over the Pd catalyst at a reaction temperature of 700 °C without any deactivation for 420 min of time on stream. Moreover highly uniform, interwoven and thin multi-walled carbon nanotubes with high graphitization degree were deposited over the catalysts.

Original languageEnglish
Pages (from-to)1320-1326
Number of pages7
JournalApplied Surface Science
Volume356
DOIs
Publication statusPublished - 30 Nov 2015

Fingerprint

Multiwalled carbon nanotubes (MWCN)
Methane
Hydrogen
Decomposition
Catalysts
Carbon Nanotubes
Carbon nanotubes
Graphitization
spinell
Magnesium
Catalyst activity
Pyrolysis
Temperature

Keywords

  • Hydrogen
  • Magnesium aluminate
  • Methane decomposition
  • Multiwalled carbon nanotubes
  • Palladium

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

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title = "Methane decomposition over Pd promoted Ni/MgAl2O4 catalysts for the production of COx free hydrogen and multiwalled carbon nanotubes",
abstract = "This article reports the synthesis, characterization and catalytic performance of Pd promoted Ni/MgAl2O4 spinel catalysts for the thermal decomposition of methane into hydrogen and carbon nanotubes. The as-synthesized catalysts were characterized for their structural, textural, morphological properties. The catalytic properties of the Ni/MgAl2O4 catalyst were found to be enhanced with Pd promoter. It effectively increased the surface area of the catalyst without affecting the pore parameters and improved the fine dispersion of NiO particles on the surface of the magnesium aluminate. The reduction temperature of Ni/MgAl2O4 was found to be lowered after Pd deposition. Moreover, the Pd promoted catalyst provided high catalytic activity and stability for methane decomposition. A maximum hydrogen yield of ∼57{\%} was obtained over the Pd catalyst at a reaction temperature of 700 °C without any deactivation for 420 min of time on stream. Moreover highly uniform, interwoven and thin multi-walled carbon nanotubes with high graphitization degree were deposited over the catalysts.",
keywords = "Hydrogen, Magnesium aluminate, Methane decomposition, Multiwalled carbon nanotubes, Palladium",
author = "Manoj Pudukudy and Zahira Yaakob and Takriff, {Mohd Sobri}",
year = "2015",
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AU - Pudukudy, Manoj

AU - Yaakob, Zahira

AU - Takriff, Mohd Sobri

PY - 2015/11/30

Y1 - 2015/11/30

N2 - This article reports the synthesis, characterization and catalytic performance of Pd promoted Ni/MgAl2O4 spinel catalysts for the thermal decomposition of methane into hydrogen and carbon nanotubes. The as-synthesized catalysts were characterized for their structural, textural, morphological properties. The catalytic properties of the Ni/MgAl2O4 catalyst were found to be enhanced with Pd promoter. It effectively increased the surface area of the catalyst without affecting the pore parameters and improved the fine dispersion of NiO particles on the surface of the magnesium aluminate. The reduction temperature of Ni/MgAl2O4 was found to be lowered after Pd deposition. Moreover, the Pd promoted catalyst provided high catalytic activity and stability for methane decomposition. A maximum hydrogen yield of ∼57% was obtained over the Pd catalyst at a reaction temperature of 700 °C without any deactivation for 420 min of time on stream. Moreover highly uniform, interwoven and thin multi-walled carbon nanotubes with high graphitization degree were deposited over the catalysts.

AB - This article reports the synthesis, characterization and catalytic performance of Pd promoted Ni/MgAl2O4 spinel catalysts for the thermal decomposition of methane into hydrogen and carbon nanotubes. The as-synthesized catalysts were characterized for their structural, textural, morphological properties. The catalytic properties of the Ni/MgAl2O4 catalyst were found to be enhanced with Pd promoter. It effectively increased the surface area of the catalyst without affecting the pore parameters and improved the fine dispersion of NiO particles on the surface of the magnesium aluminate. The reduction temperature of Ni/MgAl2O4 was found to be lowered after Pd deposition. Moreover, the Pd promoted catalyst provided high catalytic activity and stability for methane decomposition. A maximum hydrogen yield of ∼57% was obtained over the Pd catalyst at a reaction temperature of 700 °C without any deactivation for 420 min of time on stream. Moreover highly uniform, interwoven and thin multi-walled carbon nanotubes with high graphitization degree were deposited over the catalysts.

KW - Hydrogen

KW - Magnesium aluminate

KW - Methane decomposition

KW - Multiwalled carbon nanotubes

KW - Palladium

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