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

Energies

Danial Qadir¹  Ali Awad²  Alamin Idris³  MuhammadSaad Khan⁴  Israr Ahmed⁵ 

[1] Chemical Engineering Department, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Malaysia;Department of Chemical Engineering, University of Faisalabad, Faisalabad 38000, Pakistan;Department of Engineering and Chemical Sciences, Karlstad University, 651 88 Karlstad, Sweden;Mechanical Engineering Department, Texas A&M University at Qatar, Al Rayyan 5270, Qatar;School of Chemical and Material Engineering, National University of Science and Technology, Islamabad 44000, Pakistan;

关键词: alloys;    carbon nanofiber;    catalyst;    clean energy;    premixed gas;   

DOI  :  10.3390/en14082220

来源: DOAJ

【 摘 要 】

The structure and performance of promoted Ni/Al₂O₃ with Cu via thermocatalytic decomposition (TCD) of CH₄ mixture (2% CH₃OH) 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% CH₄ 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.

【 授权许可】

Unknown