Hydrogen Yield from CO 2 Reforming of Methane: Impact of La 2 O 3 Doping on Supported Ni Catalysts

Ahmed Abasaeed, Samsudeen Kasim, Wasim Khan, Mahmud Sofiu, Ahmed Ibrahim, Anis Fakeeha and Ahmed Al-Fatesh
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Ahmed Abasaeed: Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
Samsudeen Kasim: Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
Wasim Khan: Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
Mahmud Sofiu: Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
Ahmed Ibrahim: Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
Anis Fakeeha: Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
Ahmed Al-Fatesh: Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia

Energies, 2021, vol. 14, issue 9, 1-14

Abstract: Development of a transition metal based catalyst aiming at concomitant high activity and stability attributed to distinguished catalytic characteristics is considered as the bottleneck for dry reforming of methane (DRM). This work highlights the role of modifying zirconia (ZrO 2 ) and alumina (Al 2 O 3 ) supported nickel based catalysts using lanthanum oxide (La 2 O 3 ) varying from 0 to 20 wt% during dry reforming of methane. The mesoporous catalysts with improved BET surface areas, improved dispersion, relatively lower reduction temperatures and enhanced surface basicity are identified after La 2 O 3 doping. These factors have influenced the catalytic activity and higher hydrogen yields are found for La 2 O 3 modified catalysts as compared to base catalysts (5 wt% Ni-ZrO 2 and 5 wt% Ni-Al 2 O 3 ). Post-reaction characterizations such as TGA have showed less coke formation over La 2 O 3 modified samples. Raman spectra indicates decreased graphitization for La 2 O 3 catalysts. The 5Ni-10La 2 O 3 -ZrO 2 catalyst produced 80% hydrogen yields, 25% more than that of 5Ni-ZrO 2 . 5Ni-15La 2 O 3 -Al 2 O 3 gave 84% hydrogen yields, 8% higher than that of 5Ni-Al 2 O 3 . Higher CO 2 activity improved the surface carbon oxidation rate. From the study, the extent of La 2 O 3 loading is dependent on the type of oxide support.

Keywords: Al 2 O 3; CO 2 reforming; La 2 O 3; CH 4; ZrO 2 (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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