Preparation of cobalt/nickel molybdenum sulfide catalysts supported by aqueous media soluable multiwall carbon nanotubes
Multi-walled carbon nanotubes (MWCNTs) have been subjected to chemical treatment in order to introduce hydrophilic functional groups on their surfaces. These covalently bonded groups did enhance the solubility of MWCNTs in aqueous media as expected. Functionalized MWCNTs were characterized using FTIR, Raman spectroscopy, TGA, X-ray diffraction, dispersion test and TEM. Then, functionalized MWCNTs were incorporated in the hydrothermal synthesis method of transition metal sulfide catalysts (CoMo, NiMo, and Ethylenediamine-CoMo Sulfides). Catalysts were characterized using X-ray diffraction, TEM, SEM, N2 Gas adsorption-desorption, elemental analysis, and Hydrodesulfurization (HDS) reaction of dibenzothiophene (DBT). The objective was to study the functionalized MWCNTs' effect; being used as a catalyst support; on the efficiency of the catalysts in the process of HDS of DBT. Results showed that CoMoS2 and NiMoS2 catalysts supported by functionalized MWCNTs demonstrated higher selectivity towards hydrogenation of DBT than unsupported catalysts. While in the case of Ethylenediamine-CoMoS2 the chelating agent had no additional benefit over the catalytic activity as was desired.^
Chemistry, Inorganic|Engineering, Petroleum
Bleibel, Hassan Ahmad, "Preparation of cobalt/nickel molybdenum sulfide catalysts supported by aqueous media soluable multiwall carbon nanotubes" (2013). ETD Collection for University of Texas, El Paso. AAI1545151.