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Effects of metal support interaction on dry reforming of methane over Ni/ Ce‐Al 2 O 3 catalysts
Author(s) -
Adamu Sagir,
Bawah AbdulRashid,
Muraza Oki,
Malaibari Zuhair,
Hossain Mohammad M.
Publication year - 2020
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.23769
Subject(s) - carbon dioxide reforming , syngas , catalysis , methane , thermogravimetric analysis , nickel , crystallite , materials science , temperature programmed reduction , methane reformer , chemistry , chemical engineering , inorganic chemistry , steam reforming , metallurgy , hydrogen production , organic chemistry , engineering
Dry (CO 2 ) reforming of methane is conducted over two newly synthesized Ni20/Ce‐γAl 2 O 3 and Ni20/Ce‐meso‐Al 2 O 3 catalysts. The x‐ray diffraction (XRD) patterns indicated that Ni20/Ce‐meso‐Al 2 O 3 exhibits a better dispersion of nickel, while Ni20/Ce‐γAl 2 O 3 has larger amounts of nickel crystallites. The temperature programmed desorption (TPD) kinetics analysis indicated that Ni20/Ce‐meso‐Al 2 O 3 had a lesser metal‐support interaction than the Ni20/Ce‐γAl 2 O 3 . The thermal gravimetric analysis (TGA) indicated that the incorporation of ceria into the Al 2 O 3 matrix helps to stabilize Ni20/Ce‐meso‐Al 2 O 3 during dry reforming of methane. The temperature programmed reduction (TPR) indicated that the synthesized catalysts were sufficiently reducible below 750 °C. A fixed bed reactor evaluation (at 750 °C) showed that both catalysts can facilitate methane reforming to syngas with minimal coking throughout the 30 hours time‐on‐stream (TOS). However, Ni20/Ce‐meso‐Al 2 O 3 is more promising in terms of prolonged stability for dry reforming applications. Moreover, the syngas yield for Ni20/Ce‐γAl 2 O 3 is close to equilibrium prediction during the first 1 hour of reaction time.