MCM-41 supported PdNi catalysts for dry reforming of methane

Date

2009-11-09

Author

Damyanova, S.
Pawelec, B.
Arishtirova, K.
Fierro, J. L. G.
Şener, Canan
Doğu, Timur

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A series of bimetallic PdNi catalysts supported on mesoporous MCM-41 with different Ni content (Ni/Si ratio of 0.2-0.4) was synthesized. The effect of Pd addition to Ni-containing catalysts as well as the effect of the Ni content on the surface and catalytic properties of the catalysts was studied. The samples were characterized using various techniques, such as energy-dispersive X-ray spectroscopy, N(2) adsorption-desorption isotherms, X-ray diffraction, thermogravimetric and differential analyses, X-ray photoelectron spectroscopy, high resolution transmission electron microscopy and temperature-programmed reduction. Reforming of methane with carbon dioxide was used as a test reaction. The results indicated that the addition of a small amount of Pd (0.5%) to Ni-containing catalysts leads to formation of small nano-sized, easy reducible NiO particles. Agglomeration of NO as well as of metallic nickel phase over PdNi samples increased with increasing the Ni content. Formation of filamentous carbon over surface of spent monometallic Ni and bimetallic PdNi catalyst was observed. In spite of filamentous carbon deposition, the catalytic activity and stability of bimetallic PdNi catalysts are higher than those of monometaillic Ni one. Within bimetallic system, the PdNi catalyst with Ni/Si ratio of 0.3 revealed the best performance and stability caused by presence of small nickel particles well dispersed on the catalyst surface.

Subject Keywords

Dry CH4 reforming, Bimetallic PdNi catalysts, Coke, Characterization

URI

https://hdl.handle.net/11511/40256

Journal

APPLIED CATALYSIS B-ENVIRONMENTAL

DOI

https://doi.org/10.1016/j.apcatb.2009.07.032

Collections

Department of Music and Fine Arts, Article

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Citation Formats

S. Damyanova, B. Pawelec, K. Arishtirova, J. L. G. Fierro, C. Şener, and T. Doğu, “MCM-41 supported PdNi catalysts for dry reforming of methane,” APPLIED CATALYSIS B-ENVIRONMENTAL, pp. 250–261, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40256.