Catalytic Decomposition of 2% Methanol in Methane over Metallic Catalyst by Fixed-Bed Catalytic Reactor

Ali Awad, Israr Ahmed, Danial Qadir, Muhammad Saad Khan and Alamin Idris
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Ali Awad: Department of Chemical Engineering, University of Faisalabad, Faisalabad 38000, Pakistan
Israr Ahmed: School of Chemical and Material Engineering, National University of Science and Technology, Islamabad 44000, Pakistan
Danial Qadir: Chemical Engineering Department, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Malaysia
Muhammad Saad Khan: Mechanical Engineering Department, Texas A&M University at Qatar, Al Rayyan 5270, Qatar
Alamin Idris: Department of Engineering and Chemical Sciences, Karlstad University, 651 88 Karlstad, Sweden

Energies, 2021, vol. 14, issue 8, 1-12

Abstract: The structure and performance of promoted Ni/Al 2 O 3 with Cu via thermocatalytic decomposition (TCD) of CH 4 mixture (2% CH 3 OH) were studied. Mesoporous Cat-1 and Cat-2 were synthesized by the impregnation method. The corresponding peaks of nickel oxide and copper oxide in the XRD showed the presence of nickel and copper oxides as a mixed alloy in the calcined catalyst. Temperature program reduction (TPR) showed that Cu enhanced the reducibility of the catalyst as the peak of nickel oxide shifted toward a lower temperature due to the interaction strength of the metal particles and support. The impregnation of 10% Cu on Cat-1 drastically improved the catalytic performance and exhibited 68% CH 4 conversion, and endured its activity for 6 h compared with Cat-1, which deactivated after 4 h. The investigation of the spent carbon showed that various forms of carbon were obtained as a by-product of TCD, including graphene fiber (GF), carbon nanofiber (CNF), and multi-wall carbon nanofibers (MWCNFs) on the active sites of Cat-2 and Cat-1, following various kinds of growth mechanisms. The presence of the D and G bands in the Raman spectroscopy confirmed the mixture of amorphous and crystalline morphology of the deposited carbon.

Keywords: alloys; carbon nanofiber; catalyst; clean energy; premixed gas (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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